eChapters

Introduction

Dry lands cover nearly one-third of the earth’s total surface and characterized by high climatic variability in rainfall and temperature along with higher potential of wind and water erosion (Mainguet, 1991; Okin, 2000). Wind erosion has been identified as one of the overriding factors of desertification in regions characterized by strong and persistent winds through out an annual dry season (Le Houerou, 1996). Clear sweep of strong winds across sandy desert is the great hindrance in sustenance and progress of agricultural activities. The strong blowing winds on one hands takes away top fertile soil thus causing irreparable loss to soil productivity, on the other hand deposition of airborne soil particles (sand, silt and clay) block the roads, railways, water bodies, open canals and burry agricultural fields (Gupta and Aggrawal,1978; Prasad et al, 2004). To minimize erosion hazards of speedy winds and optimize production of agricultural crops, various efforts have been made in the past by adopting different soil conservation measures among which the windbreak/ shelterbelt plantations rank high due to their expected effects on wind velocity, microclimate and productivity. 

Abstract: This article gives an overview of the possibility and scope of successful cultivation of medicinal and aromatic herbs as intercrops with multipurpose tree species under agroforestry conditions. The challenges are many. Sustainable production under any agroforestry system is the main goal to be achieved through short and long term strategies. Diversification of the existing conventional cropping sequences coupled with developing of suitable technology packages is the need of the hour to cope up with ever increasing demand for diversified products. The hypothesis is, if intercropping of annuals, biennials and perennial medicinal plants in association with fuel, fodder, timber, pulp, fruit trees including tree species with medicinal values on the farmland, an alternate land use system; can provide economically viable option for sustainable systems. This chapter describes the potential and benefits of medicinal plants based agroforestry. Our experience is that planting timber, fuel and fodder or fruit tree species in combination with medicinal crops paves the way for diversified products and better economic returns to the farmers. Multipurpose tree species outside the forest have played very important role in catering to the day to day requirements of the rural population. Different farming systems consisting of crops + trees have yielded encouraging results and have not only helped diversification but enhanced productivity of land per unit area. Intercropping medicinal and aromatic herb species further makes agroforestry more remunerative.

Abstract: The Santhals of Orissa raise Teak (Tectona grandis) and Cashew nut(Anacardium occidentale) on their marginal and wastelands randomly to meet their contingencies. Upland is utilized for short duration upland paddy cultivation for food. The sporadically grown Teak and Cashew is used as insurance crops for meeting the high risk of dry land paddy. This work is unique and innovative as it was carried out in participatory mode on the pooled land from 14 Santhal households.  It is a maiden attempt in Orissa to develop Agroforestry models using forestry (teak) and horticulture (cashewnut) interventions into the paddy cultivation on uplands by Santhals without much alteration in their age old traditional agricultural practice. The basic objective of this research is to develop most profitable Agroforestry system(s) to provide best land use option for the risk prone dry land paddy cultivation to improve the farmers’ economy with simultaneous natural resource conservation.
 
The Agroforestry models Silvi-horticulture (Teak and Cashewnut)  Agri-silviculture (Paddy and Teak), Agri-horticulture (Paddy and Cashewnut) and Agri-silvi-horticulture (Teak, Cashew nut and Paddy) were developed by the Santhal tribe in Mayurbhanj District of Orissa. The inputs and planting material were sponsored by a leading NGO- Gamin Vikas Trust, which is working on poverty alleviation through Natural Resource Management of the State.

1.    The concept of agribusiness was born in Harvard University in the year____________.

(a) 1947

(b) 1956

(c) 1967

(d) 2006

2.    In agriculture education system, the concept of “Agribusiness” was first time used by

(a) John Davis

(b) P F Drucker

(c) Henery Foyal

(d) F.W. Taylor

Section-A : Write True / False

Q.1 A better and more beautiful way to present the data in a more visual form can be done by means of diagram.

Q.2 Description of data through diagrams and graphs is better for layman.

Q.3 Diagram does not register a meaningful impression almost before we start to think about it.

Q.4 Diagrams are never used by the business man and government agencies for advertisement and educating people.

Q.5 Diagrams do not give visual presentation of data.

Q.6 The diagrams put a rememberance for a longer time in mind of human being.

Q.7 Diagrams facilitate comparison and reveal pattern of data.

Q.8 Diagrams show approximate values of items in data.

Q.9 Diagrams are more attractive, appealing and impressive than tables.

Q.10 Diagrams can be more easily compared and interpreted than the tables.

Q.11 Tables contain precise figures while diagrams indicate approximate figures.

ABSTRACT
Methanogenesis is an important biogeochemical process takes place in anaerobic ecological sites. It is the last step of terminal electron accepting process of anaerobic respiration. Methanogens synthesise CH₄ using acetate and CO₂ as precursor molecules. Former types of methanogens are referred as acetoclastic methanogens and the later ones as hydrogenotrophic methanogens. After biogenesis of CH₄, it is emitted to atmosphere and causes global warming. In aerobic ecosystem CH₄ is oxidised by methanotrophs to CO₂ a less global warming molecule. However, in anoxic environment CH4 acts as an electron donor and interacts with various electron acceptors. Methane modulates denitrification, Fe reduction, SO₄ reduction and organic matter decomposition. Manuscript elucidates methanogenesis and highlights the pathways of interaction between methanogenesis and cycling of electron acceptors in various anaerobic ecosystems in relation to global C and N balance.

3.1    Competitive and Collaborative Research
    
3.2    The Strategy to Protecting Plants : Plant Variety Protection Act
    
3.3    IPR Issues in Biotechnological Patents Haldi, Neem and Basmati Rice
    
3.4    Patent Litigation

Semen collection is the most important component of any frozen semen production programme as a high quality end product is not possible unless the raw material is of excellent quality. Therefore, all care should be taken to collect semen aseptically with the aim to harvest the best quality neat semen for processing. The person collecting semen should understand bull’s behaviour and should be friendly with him. Professional bull management results in increasing sperm output and enhancing productive life of the bulls. One must know potentials and limitations of the reproductive capacity of bulls. A highly professional and dedicated team of bull handlers and semen collectors is required for this purpose. The persons involved in bull management should be familiar with bull’s sexual behavior and male reproductive physiology. Preferably a veterinarian should collect semen.

The analysis of chromosome behaviour at meiosis can provide valuable information about the genomic composition of both species and hybrids. The basis for this analysis is the idea that chromosomes that pair and undergo chiasma formation are homologous. Where two genomes are present, as in diploids, the expectation is that only bivalents will be observed and where there are multiple genomes, as in polyploids, two general patterns of pairing are possible. In autopolyploids, configurations of multiple chromosomes are to be expected since all the component genomes are homologous and have the possibility of pairing with each other, whereas in allopolyploids, with different genomes, bivalent formation is the expectation. Thus, meiotic analysis can provide an oversight for genome analysis to investigate genetic relationships between the species. Further, chromosomal rearrangements are correlated with pollen fertility in species and F₁ hybrids.  Observations on pollen formation, size and viability can provide useful information, as low pollen viability is often indicative of meiotic irregularities and large sized pollen can indicate the formation of unreduced gametes. In addition, the occurrence of nucleolar dominance has been recorded in many interspecific hybrids.

Introduction and Importance of active site

Proteins are polymers of amino acids coupled by peptide bonds. The constituency of a protein that interacts with a ligand is habitually referred to as the “active site.” Ligands can be proteins, DNA or smaller molecules, such as pharmaceutical compounds [1]. The active site generally lies on the surface of the protein. In some cases, the active site is buried within the protein. Residues with reactive groups (ASP, GLU, SER, CYS, HIS, LYS, ARG) tend to be profuse in protein active sites [2]. The SER-HIS-ASP (sometimes SER-HIS-GLU) named as “catalytic triad” which is a motif, generally found in enzyme active site. Enzymes chip in a significant role in scheming the flow of metabolites within a cell, they catalyze virtually all of the reactions that make and modify the molecules mandatory for biological pathways [3]. The identification of catalytic residues is a key step in recognizing the function of enzymes. The site on the surface of an enzyme molecule that binds and acts on the substrate molecule are called as active site.

13.1    Biochemical Changes During Banana Ripening
    
13.2    Commercial Ripening

Q.1.    What is an experiment ?

    Answer
    
    An experiment is a means of getting an answer to the question that an experimentor (researcher) has in mind. This may be to decide which of the several pain relieving drugs that are available in the market, is the most effective or whether they are equqlly effective.
    
    An experiment may be planned to compare the yield of different varieties of wheat. so that the varity giving the maximum yield may be recommended to the farmers to increase their production.

INTRODUCTION

Phalsa, Grewia subinaequalis DC (syn. Grewia asiatica L.) is native to the Indian sub-continent and South-East Asia and belongs to family Tiliaceae, to which jute, our major money earning fiber crop, also belongs.Phalsa has been mentioned in our Vedic books and is native to India and other parts of southeast Asia, including Pakistan, Sri Lanka and Bangladesh. It is known by many names viz., Hindi (Phalsa, Shukri, Tadachi, Dhaman, Parusha); English (Indian phalsa, phalsa); Bengali (Phalsa, Shunkri); Kannada(Phulsa), Telegu (Phutiki), Tamil (Unnu), Malayalam (Chadicha) Gujarati (Shukri), Filipino (Bariuangulod) and Thai (Potaohai,Yapkheethao,Malai,Laikhon). The plant is commonly known as Gangeran. Grewia species is one of the best examples of multipurpose fruit species which are useful source of food, fodder, fiber, fuelwood, timber and a range of traditional medicines which cure a number of diseases (Sharma and Patni, 2012). 

Today, when the collection of biological data has been increasing at explosive rate, the processing of these data is needed. It would be extremely valuable if the specialists who know what the data mean were also able to imagine ways to collect, process and exploit these data. Biological and agricultural scientists should note that concepts from computer science, discrete mathematics and statistics are being used increasingly to study and describe biological systems. The specialists, who know the subjects of mathematics, statistics and computer programming, are needed for solving the computational problems in biology. Statistical data mining approaches seem ideally suited for bioinformatics, since it is data rich, but lacks a comprehensive theory of life organization at molecular level, or in the words of I.E. Alcamo “ Keeping up with the directions and application of DNA is a never ending job.” Starting with possible definitions of statistical data mining and bioinformatics, this chapter will give a general side view of both the fields on the statistical data mining part and its technologies and discuss how statistical data mining may be used in bioinformatics.

The development of bio-informatics started with the working of computers and accumulation of data on genes and proteins. There are 100,000 proteins in the human body or 1 million. In the last decade the number of protein sequences gathered in databases increased tremendously, but the key to understand the function of a protein is not its sequence but its structure. Experimental determination of 3 dimensional native folded structure of a protein usually can be done via crystallography techniques. But such experiments are time consuming. Currently there are hundreds of different fully automated approaches to protein 3D structure prediction.

All proteins are polymers of Amino acids. The polymers also known as polypeptides consist of a sequence of 20 different L-m-amino acids also referred to as residues. For chains under 40 residues the term peptide is frequently used instead of protein. To be able to perform their biological function, proteins fold into one that is driven by a number of non covalent interactions such as hydrogen bonding, ionic interaction, Vander Waal’s forces and hydrophobic packing. In order to understand the functions of proteins at a molecular level, it is often necessary to determine the three dimensional structure of proteins. The modern Information Technology techniques like Artificial Intelligence have opened new pathways to researchers. Once ANN has been trained it is capable of producing accurate output for the unknown inputs. Many researchers have tried to analyze the large sequence sized gene to determine the protein, predict the secondary structure of the protein and model its three dimensional (3D) view [11].

ANALYSIS OF CODON USAGE VARIATION

Multivariate analysis methods such as Correspondence Analysis and Principle Component Analysis have often been used to identify major trends of variation in synonymous codon usage among inter or intra specific genes. Genetic codes are degenerate meaning most of amino acids can be encoded by more than one codon (triplet of nucleotides); such codons are synonymous and usually differ by one nucleotide in the third position. The alternative synonymous codons are not used with similar frequency and their usage varies among different genes. Hence there is the presence of Relative Synonymous Codon Usage values. 

SEQUENCE DATA

The gene sequences downloaded from Genbank of National Center for Biotechnology Information that is the nucleotide sequence repository known worldwide, serves as the secondary data used for analysis. Relative synonymous codon usage value of each gene is extracted separately using the Codon Usage software of Sequence Manipulation Suite. These are the raw data which needs to be normalized to be used before application of various multivariate analysis.

SYSTEMS BIOLOGY

The ultimate goal of any biological experiment is to understand biological systems in sufficient detail to enable accurate, quantitative predictions about the behavior of the systems, including predictions of the effects of modifications of the systems. To precisely simulate the behavior of the system using a computer model is one of the ways to achieve the above goal and in this venture we are nowhere close to the goal. Systems biology will help us to get closer to this goal and it is expected that biologists to adopt to take advantage of the power of systems biology approach. Systems biology is an emergent field that aims at system-level understanding of biological systems. Systems Biology is the study of the interactions between the components of biological systems, and how these interactions give rise to the function and behavior of that system. For example, theenzymes and metabolites in a metabolic pathway.With the progress of genome sequence projects and range of other molecular biology projects that accumulate in-depth knowledge of molecular nature of biological system, we are now at the stage to seriously look into possibility of system-level understanding of solidly grounded on molecular-level understanding.Unlike molecular biology which focus on molecules, such as sequence of nucleic acids and proteins, systems biology focus on systems that are composed of molecular components. Although systems are composed of matters, the essence of system lies in dynamics and it cannot be described merely by enumerating components of the system.

1.     Centrifuge
    
2.     Spectrophotometer
    
3.     Microscope

3.1. INTRODUCTION

Heterosis is the superiority of the F1s over the parental forms. The term heterosis was first used by Shull (1910) to describe the interpretation of increased vigour, size, fruitfulness, speed of development, resistance to diseases and insect pests or some other characteristics manifested by out-breeding organisms as compared to corresponding inbreds. Exploitation of heterosis is gaining momentum due to increased yield, quality, uniformity, better desirable traits and management of biotic stresses. The future of most of the economic crops will be for hybrids for sustainable development of higher economic returns to the farmers. Sustainable increase in area under hybrid crops is witnessed by its popularity and adoption by the farmers.

The Intergovernmental Panel on Climate Change (IPCC) in its fifth assessment report (AR5) stated that warming of the climate system is unequivocal and is more pronounced since the 1950s. The atmosphere and oceans warmed, the amounts of snow and ice have diminished, and rise in sea level is noticed. Each of the last three decades has been successively warmer at the earth’s surface than any preceding decade since 1850 and the globally averaged combined land and ocean surface temperature data show a warming of 0.85°C over the period 1880 to 2012. The recent years viz., 2015, 2016 and 2017 were the hottest years on record. The warming trend in India since 1961 has indicated an increase of 0.9°C, which is likely to impact many crops, negatively impacting food production. There are already evidences of negative impacts on yields of wheat and paddy in northern India due to increased temperature, water stress, and reduction in number of rainy days. Coastal agriculture has the onus of providing livelihood to nearly 20 % of Indian population. The water logging and coastal salinity are the major factors affecting the agricultural output from the regions.

Tamil Nadu has unique physiography with western and eastern Ghats on the west and northwest, Bay of Bengal in the east and Indian Ocean to the south. Tamil Nadu has high dependence on natural resources and hence faces the threat of climate change and its impacts. Available evidence shows that there is high probability of increase in the frequency and intensity of climate related natural hazards (Stephen, 2012). Out of 13 million hectares of geographical area, about 7 million hectares of land is under cultivation. Of this 55 per cent is irrigated and rest is under rain fed / dry lands. In Tamil Nadu, ground water has been harnessed fully and dry land productivity is found oscillating with ruling variability in seasonal monsoon rain and hence agricultural productivity is always under stake.

Introduction

Agroforestry, the word coined in the early seventies, has made its place in all the developed and the developing countries of the world and is now recognized as an important approach to ensuring food security and rebuilding resilient rural environments (Luedeling et al. 2014).  Agroforestry applies to private agricultural and forest lands and communities that also include highly erodible, flood-prone, economically marginal and environmentally sensitive lands (Continents 1986). The typical situation is agricultural, where trees are added to create desired benefits. Agroforestry allows for the diversification of farm activities and makes better use of environmental resources (Taylor et al. 2007). Agroforestry is defined as a land use system which integrates trees and shrubs on farmlands and rural landscapes to enhance productivity, profitability, diversity and ecosystem sustainability. It is a dynamic, ecologically based, natural resource management system that, through the integration of woody perennials on farms and in the agricultural landscape, diversifies and sustains production and builds social institutions. India has been an all-time leader in agroforestry (Chavan et al. 2015).

Introduction

Arid lands are among the world’s most fragile ecosystems, made more so by periodic droughts and increasing over exploitation of meagre resources. Arid and semi-arid lands cover around one-third of the world’s land area and are inhabited by about one billion people, a large proportion of whom are among the poorest in the world (Malagnoux et al. 2007). Arid environments are extremely diverse in terms of their land forms, soils, fauna, flora, water, and human activities. Aridity is usually expressed as ratio of mean annual precipitation (P) to the mean annual potential evapotranspiration (EPT) where potential evapotranspiration is calculated by method of Penman, taking into account atmospheric humidity, solar radiation, and wind speed. UNEP (1997) has recognized four main classes of aridity: hyper-arid (P/EPT < 0.03), arid (0.03 < P/EPT < 0.20), semi-arid (0.20 < P/EPT < 0.50), and dry sub-humid (0.50 < P/EPT < 0.65). Of the total land area of the world, the hyper-arid zone covers 4.2 %, the arid zone 14.6 %, and the semi-arid zone 12.2 % (FAO 1989). Therefore, almost one-third of the total area of the world is “arid land”. 

Introduction

There is a growing interest in the role of different types of land use systems in stabilizing the atmospheric CO₂ concentration and reducing the CO₂ emissions or on increasing the carbon sink of forestry and agroforestry systems. Forestry has been recognized as a means to reduce CO₂ emissions as well as enhancing carbon sinks. There is considerable interest to increase the carbon storage capacity of terrestrial vegetation through land-use practices such as afforestation, reforestation, and natural regeneration of forests, silvicultural systems and agroforestry (Brown 1996; Canadell and Raupach 2008). Agroforestry systems are very important given the area currently under agriculture, the number of people who depend on land for their livelihoods, and the need for integrating food production with environmental services (Garrity 2004; Makundi and Sathaye 2004).

Introduction

The literatures and researcher data showed that there is negative impacts of agricultural expansion, landscape modification and deforestation on biodiversity, ecosystem services, alteringthe species composition and their ecological functions (Tscharntke et al. 2005; Priess et al. 2007; Flynn et al. 2009; Senior et al. 2013; Deguines et al. 2014; Kumar 2016) which can lead to considerable changes in critical ecosystem processes. On the other hand, an increasingly industrialized global economy, rapid population growth, land degradation, land use pattern and role of various human activities have led to dramatically increased the pressure on the natural resources such as the available land for sustaining the livelihoods, and with over exploitation and extraction of the natural resources the ecosystems are becoming unsustainable and fragile since last century (Kumar 2017). Standardization of cultural practices is one of the primary objectives to make the system ecologically, sustainable and economically viable (Gill et al.2009).

Introduction

The vast majority of climate change impacts and the overall impact of climate change on rice production are likely to be negative. Overwhelming scientific research and evidence have shown that the climate is ongoing. According to the International Food Policy Research Institute (IFPRI) report Climate Change: Impact on Agriculture and Costs of Adaptation forecasts there will be an increase in the net price of rice between 32 and 37% as a result of climate change by 2050. They also show that yield losses in rice could be between 10 and 15%. While there is still ongoing scientific exploration into climate change, IRRI recognizes two universal trends predicted by all climate change models viz., temperatures will increase, resulting in more heat stress and rising sea levels and there will be more frequent and severe climate extremes.

Introduction

Arunachal Pradesh is the largest hill state of North Eastern Himalayan Region having the total geographical area of 83,743 Sq Km, stretching between 26o28’ to 29o28’ N latitude and 91^º35’ to 97^º27’ E longitude and is endowed with a unique geo-physiography. Topographically, Arunachal Pradesh is generally a hilly region, with entire state lies on the mighty Himalayan and Patkoi ranges. The elevation of the hills ranges from 60 meters to over 7000 meters. Mt. Kangto (7090 m), Mt. Nyegi Kangsang (7050 m) and Mt. Gorichen (6488 m) are three highest peaks of Arunachal Pradesh. The Himalayan mountain system divides the state mainly into five river valleys: the Kameng, the Subansiri, the Siang, the Lohit and the Tirap. These rivers, along with innumerable rivulets traversing through innumerable hill systems treading through the rugged terrains, steep hills, valleys and ultimately drain down to from two major river systems and valleys of the region__ the Brahmaputra and the Barak. The state has rich biological as well as cultural diversity.

Introduction

Climate is a measure of the average pattern of variation in temperature, humidity, atmospheric pressure, wind, precipitation and other meteorological variables in a given region over long period of time. Climatic change refers to the shifts in the mean states of the climate or in all its variability, persisting for an extended period (decade or longer). The expected climatic change includes an increase in average temperature, an increase in CO₂ concentration and varied rainfall regimes due to increased ultra violet-B radiation. Fossil fuel burning and deforestation have emerged as principal anthropogenic sources of rising atmospheric CO₂ and other greenhouse gases and consequent global warming and climatic change.

Introduction

ICT is an acronym for Information and Communication Technology.  The information refers to accessibility of digital data in an easy way to retrieve relevant facts. The communication refers to the medium or the way to transmit the information from one place to another place or one media to another media. The advancement in these areas refers to technology. The collectively ICT covers any product that will store, retrieve, manipulate, transmit or receive information electronically in a digital form. For example, personal computers, digital television, email, robots.

Climate change may refer to a change in average weather conditions, or in the time variation of weather around longer-term average conditions (i.e., more or fewer extreme weather events). The change lasts for an extended period of time i.e., decades to millions of years has also been considered as climate change. The causing factors of climate change are biotic processes, variations in solar radiation received by Earth, plate tectonics, and volcanic eruptions. The affecting factors seems to be irreversible, it has become the today’s necessity to develop improved next generation technologies which processes the current and future shifts in the climate system. In particular, the Agriculture will be most affected domain due to climate over the next few decades (Brown and Funk, 2008). The development of crop modeling tools pointed out that climate change is likely to decrease agricultural production.

Introduction

Greenhouse gases (GHGs) are the atmospheric trace gases which absorb and emit infra-red radiation and thereby trapping the heat radiated from the earth surface. The commonly known agriculturally important GHGs are carbon dioxide (CO₂), methane (CH₄) and nitrous oxide (N₂O). The major anthropogenic sources of CO₂ emission in atmosphere are biosphere, burning of fossil fuels and land use changes in tropical forests. The atmospheric concentration of CO₂ has increased from 280 parts per million by volume (ppmv) in 1750 to 394 ppmv in 2012 and is currently increasing at the rate of 1.9 ppmv year-1 (NOAA, 2012). Atmospheric CH₄ concentration has increased from about 715 to 1826 parts per billion by volume (ppbv) in 2012 over the same period and is increasing at the rate of 7 ppbv year-1 (IPCC, 2007; EPA, 2013). Similarly, the atmospheric concentration of N₂O has increased from about 270 ppbv in 1750 to 325 ppbv and is increasing at the rate of 0.8 ppbv year-1 (IPCC, 2007; EPA, 2013).

The UN designation of 2013 as the International Year of Water Cooperation aptly demonstrates growing gap between water supply and demand. These symptoms, which are already visible in a few regions around India, are soon to assume a national proportion and may become permanent feature of the water sector in the country, unless suitable policies are adopted quickly to manage water demand and supply at different levels. Water demand is growing fast due to a rapid population growth and economic activity, but water supply is not growing at the same rate because of serious ûnancial and physical limits for supply augmentation. Water resources developed at present amount to about 680 km³, which constitutes 61% of the utilizable potential of 1122 km³. However, it is difficult to add supply beyond this level due to heavy costs, environmental concerns and interstate water conûicts. In contrast, the total demand for water is projected to reach 784–843 km3 by 2025 and 973–1180 km³ by 2050 (Ministry of Water Resources, 2000). Recent research studies predict that, if the demand– supply gap continues to increase, nine basins that have over four-ûfths of the total water use in India will face physical water scarcity by 2050 (see Amarasinghe et al., 2007). For a heavily populated, monsoon-dependent and rural-based country, such as India, water scarcity of this magnitude will not only lead to serious water conûicts among sectors and regions, but also have a devastating effect on the food and livelihood fronts.

Mammals are homeothermic, meaning that they have the ability to control their body temperature within a narrow range in an environment whose temperature may change over a wide range.

India is experiencing a phenomenal spurt in the growth of livestock and poultry sectors through various timely and quality measures scientifically over a few decades. Milk production rose by a large leap from about 17.0 million tones in 1950 to about nearly 100 million tones in 2005 standing first in the world for maximum quantum of milk production. From about a ‘naught’ during 1950, the commercial layers have increased to 220 millions in 2005 producing 4500 crores of eggs every yearranking 5th in the world. The meat production is absolutely fascinating with 20 million birds in 1960 to about 2100 million in 2005 (Table 10.1).

Introduction
 
Natural control strategies that employ biological agents for pest suppression are generally classified as biological control tactics. In conventional usage, this term usually refers to the practice of rearing and releasing natural enemies:   parasites, predators, or pathogens. A slightly broader definition of “bio-control” includes any related management activity that is designed to protect or conserve natural enemies. Biological control is the use of living organisms to maintain pest populations below damaging levels. Natural enemies of arthropods fall into three major categories: predators, parasitoids, and pathogens (Altieri et al., 2005; Mahr et al., 2008).

Introduction

The Indo-Gangetic plain (IGP) is of great importance for the food security of India. It extends over 1,600 km with a width of 320 km, including the arid and semi arid environments in Rajasthan and Punjab and the humid and per humid deltaic plains in west Bengal (Shankaranarayana, 1982). During the green revolution period in the early 1960s, production increased through area expansion and intensification of the rice –wheat system. Driving forces included suitable thermal regimes for rice and wheat cultivation, development of short- duration, nitrogen responsive cultivars, expansion of irrigation and an ever increasing demand for food from the rising population. The rice –wheat system, covering an area of around 10 million hectares (mha), is the major cropping system in the IGP. These two crops together contribute more than 70 % of total cereals production in India from an area of around 25 mha under wheat and about 40 mha under rice. The small states of Punjab and Haryana contribute 20 % of the total national grain production and 50 % and 85 % of the government procurement of rice and wheat, respectively (Singh, 2000).

Introduction

It is estimated that about 16 per cent of total geographical area of India (329 m ha) has moisture index value below - 66.6% and is thus classified arid. This area is further classified into hot arid (36.8 m ha) and cold arid (15.2 m ha) regions (Ramakrishna et al., 2000). The hot arid region is characterized by extreme temperatures, low (<500 mm) and erratic rainfall, very high wind velocities, low humidity, high PET (>1800 mm) and frequent severe droughts which occur once in three years to alternate years in general. The soil moisture and soil temperature regimes are aridic and hyperthermic, respectively. The hot arid region exists in Rajasthan, Gujarat, Andhra Pradesh, Punjab, Haryana, Maharashtra, and Karnataka (Fig 1).

Introduction  

Developing effective strategies for improving and stabilizing rainfed crop production continues to be a prime concern in the semi-arid region of western India. Rain water management is most crucial aspect in rainfed production systems. Growing uncertainties associated with rainfall pattern (Ali et al., 2007) add to the complexity of the challenge. The medium deep black soil region of Rajasthan is spread predominantly in Jhalawar, Kota, Baran, Bundi, and Sawai Madhopur districts of South-eastern Rajasthan (Fig. 1). This region is characterized by almost flat alluvial plains interspersed with hills of Arawali and Vindhyan ranges and rock outcrops. 

Introduction

Soil is considered one of the world’s limited, non-renewable resources. Under cropland conditions, it takes between 200 and 1000 years for 2.5cm of topsoil to form (Piementel et al., 1995). The continued maintenance of fertile soil is essential in order to meet basic human needs. It strengthens the provision of ecosystem services such as food production and climate regulation, and provides the basis of livelihoods for millions of people across the world (Ma, 2005). The multi-functionality of soils is key to the sustainable use of land and soils. A healthy soil performs six essential functions (Andrews et al., 2004) namely: i) Physical Stability and Support, ii) Water Relations, iii) Resistance and resilience- iv) Nutrient Cycling, v) Biodiversity and Habitat and vi) Filtering and Buffering. These soil functions are controlled by various soil properties. Among them soil structure is one of the most important properties of soil, which describes soil condition and has a great influence on crop production.

Introduction

Climate change has undoubtedly resulted in greater public and scientific involvement. Climate change refers to any change in climate over time, whether due to natural variability or as a result of human activity (IPCC, 2007). The United Nations Framework Convention on Climate Change (UNFCC) defined it as a change of climate that is attributed directly or indirectly to human activity which alters the composition of the global atmosphere and that is in addition to natural climate variability observed over comparable time periods. World Meteorology Organisation defines climate change as statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades or longer). 

Introduction

Modern agriculture has been of great help in alleviating hunger from the world, because the world population more than doubled itself during the last half of the 20th century; it increased from 2.5 billion in AD 1950 to 7.1 billion in 2012 (USCB, 2013). It is predicted that the world population will again double itself by the end of the 21st century and will touch the 12 billion mark. Most of this increase in population has been, and will be, in the developing countries in Asia, Africa and South America. India occupies 2.4 percent of the total land area of the world, but supports 16.7 per cent of the world population. Like many other developing countries in the world, population in India is increased from 345 million in 1947 to 1210 million as per the 2011 census with a growth rate of 1.76 during last decade. Therefore, pressure on land has been mounting up at an alarming rate. Population growth coupled with live stock population expansion, urbanization and industrialization are major contributory factors to it. The unscientific and unplanned exploitation of this limited resource takes its toll in terms of degrading the land. A large proportion of the land area shows clear evidence of advanced and continuing degradation seriously affecting the country’s productive resource base (Abrol and Sehgal, 1994). Jammu & Kashmir and  Nagaland  have maximum share of their land (94%) under degradation. This is primarily due to large areas under mountains, cold deserts and other such degraded lands. In the agriculturally prominent states like Uttar Pradesh (63%), Madhya Pradesh (50%) and Karnataka (46%) (Shalander Kumar, 2011) the extent of land degradation is of great concern and posing a big threat to the natural resources, resulting in almost 5 billion tonnes soil and 6 million tones of nutrient loss every year (Singh, 2009).

Introduction

India is a rich center of plant diversity due to varied climatic conditions as well as soil qualities which provide a better platform for the diverse plant groups. In India around 45000 plant species are spread over the area (Mayers, 1988). These plant species multiply and produces the new plant. The multiplication of plants is termed as propagation and the art of propagation is as old as civilization of human being. The history of civilization began with the propagation and growing of plants. Plant propagation was in practice in pre-historic period. However, the propagation process has got commercial popularity only recently. The success in plant propagation depends on a thorough knowledge of the growth of plants, choice of suitable method and technical skill. In nature, plants multiply naturally to perpetuate themselves. Now-a-days, propagation practices have been totally modernized and became advanced from field to in vitro. Variation in plant propagation can be observed in the nature like some plants are producing many seeds for future generation with their unique type of dispersal mechanism. Among a large

Abstract

Plant research often involves growing new plants in a controlled environment. These may be plants that we have genetically altered in some way or may be plants of which we need many copies all exactly alike. These things can be accomplished through tissue culture of small tissue pieces from the plant of interest. The latest list of ISO recognizes 109 spices, but only a few are important commercially such as black pepper, cardamom, ginger, turmeric, large cardamom, cumin, coriander, fennel, fenugreek, garlic, saffron and celery. They are extensively used in flavouring food and confectionery, perfumery and soaps and also as colouring materials. Many of these groups of crops have medicinal properties and are used in many Ayurvedic and Unani medicines. Inspite of the rich diversity and importance, the productivity of spices is low in India. Spices are an important group of economic plants with large genetic diversity in the Indian subcontinent and need to be conserved through in- vitro methods. Conservation of the germplasm using traditional method of field maintenance is problematic, normally labour intensive and also face risk of germplasm loss due to pest/pathogen attack or natural disasters. To minimize the problems of their conservation and increasing interest has been shown to use plant tissue culture. In vitro conservation of germplasm has been reported in various crop species including the spices black pepper, cardamom, ginger, turmeric, large cardamom.

Abstract 

The district Murshidabad lies within the Younger Deltaic Plain and the Bhagirathi Recent Surface has been considered as the severe flood affected district of West Bengal state, India. Murshidabad is highlighted one in terms of occurrence of flood due to its typical geographic location and diverse geomorphological characteristics. The district witnessed frequent floods because of high intensity of rain fall in the basin area of Bhairavi-Jalangi-sealmari rivers. Inflow of flood water from Ganga-Padma in high spate condition further aggravates the congestion of drainage. Lack of proper drainage is also responsible for flood in the upstream side in the western part as well as beyond the Berhampur town. Flood management may be undertaken through physical and socio-economic measures, which includes the scientific control of reservoirs; construction of new barrages, improvement of river channels, removal of human encroachment along river side, timely flood warning and forecasting, preparedness of essential services along with proper flood plain planning are indispensable. Addressing of socio-economic problems may help to combat the flood situation in an effective way.

Abstract

‘Women Empowerment’ has been now an important phrase of discussion for the social scientists. The concept of ‘Empowerment’ was firstly highlighted by the Political Scientists. Undoubtedly, effective utilization of human potentials and realization of knowledge about him/herself are believed to be the most critical capabilities of individuals. Probably this is the root of ‘Empowerment’. The term ‘Women Empowerment’ symbolizes women’s realization about their potentials. On the other hand, SHG approach intends to highlight towards unfolding the potentials of women through group approach, enabling them to help themselves by their own capacity. In spite of this, the condition of women SHGs is in doldrums. This might be quite difficult to generalize the whole scenario. The study is a modest endeavor to revisit women SHGs (developed by NGOs) of East Singhbhum districts of Jharkhand. Of the various factors attributed to tribal socio-economic lives of family based farmers, gender role is considered as the important factor. Tribal women in almost all walks of life are sharing responsibilities in domestic as well as economic sector.The study is based on Ex- post facto research design. The methods of data collection were quantitative and qualitative in nature and were aimed to seek answers to certain research questions. Participatory Rural Appraisal and FGD are being the dominant methods.

Abstract

Sundarban is the largest mangrove wetland ecosystems in the world. This World Heritage site along the Bay of Bengal has evolved over the millennia through natural deposition of upstream sediments accompanied by intertidal segregation. Indian part of Sundarbans is estimated to be about 4,110 square kilometres of which about 1,700 square kilometres is occupied by water bodies in the form of river, canals and creeks of width varying from a few metres to several kilometres, which together form the complex ecosystem of this Ganges delta.. Rivers in the Sundarbans are confluence points of salt water and freshwater. Environmental crisis is caused by severe cyclones sea level rise and storm surge followed by coastal erosion, flood and earthquake phenomenon. River water is saline. Shallow aquifer is brackish/ saline, which is not suitable for drinking. Fresh potable ground water is occurring in deeper aquifer, the exploitation of which is not cost-effective. Sundarbans houses around 500 different species of mammals, fish, bird and reptiles and it is the largest habitat of royal Bengal tigers. Conservation of flora and fauna in the typical ecosystem of Sundarbans in India with emphasis on judicious use of ground water resources along with retrospection of historical trend and future sustainable management strategies is a pre-requisite.

Abstract 

The on-farm programme on SRI was carried out in the village Narayanpur under RLI command area in Karimpur II Block of Nadia district in the year 2016 during summer season. The soil of farmland is clay loam and situated having latitude of 23°54’26.5"Nlongitude 88°30’24.1"Eat an average elevation of 9.75 m above the mean sea level. Monsoon ceases during October and cool season sets in by November. The average rainfall of this region is about 1500 mm and normal monsoon breaks in the first week of June. Though water resources in this area are generally satisfactory and 90% of these resources are tapped form the ground water source through deep and shallow tube wells. However, due to faulty crop planning and lack of scientific water management approach, a significant portion of agricultural area is identified as gray zone from hydrological point of view. Even many tube wells are becoming dry due to over exploitation of valuable water from the lower depths of confined aquifers. Rice is predominant crop during kharif season becoming less profitable because of high input costs involved. Summer rice gave satisfactory yield but also profitable proposition because of more input cost and less farm gate prices.  

Abstract

Importance of organic sources of nutrients was recognized in current scenario in order to get higher yield without disturbing soil health. In this context integrated use of inorganic and organic sources of nutrients in crop production is becoming very crucial for assurance of food security on sustainable basis, which in turn not only improve the soil fertility for sustained crop productivity but also to reduce the cost of inorganic fertilizers. Among the various organic sources humic acid plays a major role in the sustainable production of vegetables. Humic acid is a natural bio-stimulant that is derived from leonardite and is among the most concentrated organic material available today. Humic acid is an organic chemical produced by decaying plants and animals residues by a process called Humification. Humic acid is not only increases the yield but also improves the soil fertility, soil productivity, soil structure and texture, promoting plant growth and resistance against various pests, diseases. In this context use of humic acid as organic sources of nutrients in crop production is becoming very crucial for assurance of food security, sustainability and improving soil health.

Abstract

Beekeeping is an agro-based activity which is being undertaken by farmers/landless labours in rural area as an integrated framing practice. It supplements income & employment generation and nutritional intake. Honeybees have been offering services to the society through ensured pollination in crops and providing honey and a variety of other bee hive products viz.; royal jelly, pollen, propolis, bee wax, bee venom, etc. Honey Bees have their vital role in sustaining plants bio-diversity resulting in environmental stability. Mainly five species of honeybees viz.; Apis cerana, A. mellifera, A. florea, A. dorsata, Stingless bees are in used in India.  Beekeeping industry has quadruple benefits: 1) providing self employment to rural and forest based population; 2) production of honey, pollen and beeswax, venom, royal jelly, etc., 3) providing employment to rural educated youths in collecting, processing and marketing of bee/beehive-products; and 4) cross-pollination of various agricultural and horticultural crops and improving their quality and increasing yields.

RECTAL EXAMINATION

It provides practically all the information required.

It is the simplest, accurate and reliable method with no cost involved.

Things Required

A full arm rubber sleeve with attached glove or disposable plastic glove.
A rubber or plastic apron.
Non-irritant soap or lubricant.

2.1. The Physical environment
    Light
    Soil temperature
    Water dynamics

2.2. Chemical environment
    Production of phytotoxins

2.3. Biological environment
    Trophic dynamics
    Community structure
    Biodiversity

Introduction

High density planting in fruit trees was first introduced in case of apple in Europe during the nineteen sixties, with the development of Malling and Malling - Merton rootstocks. Subsequently, this was experimented in other temperate fruit crops like peach, plum, pear and sweet cherry. Today, majority of new orchards of apple and to some extent that of other fruit crops in Europe, New Zealand, USA and Australia use this intensive system of fruit production profitably Iyer and Kurian (2006). The successful management of trees in any high-density planting system depends on maintaining a balance between vegetative growth and fruiting.