eBook Chapters

Storage of paddy seed lots after harvesting is one of the crucial aspects of processing shopfloor. Paddy due to increased mechanised harvesting may loose vital seed quality parameters. Since seed growers cannot buy a combined harvester themselves-they resort to hiring of this machine. Sometimes in the hurry of completing harvesting they harvest the crop at un-safe moisture content. This un-safe moisture content may go up to 50-60% also. Harvesting of seed crop with high moisture has adverse effect on storability. Ensuring safe seed moisture is very critical especially during rabi-summer seed production cycle. Most of the growers depend on sun drying for reducing the seed moisture. But paddy should not be dried >3% in one cycle. Follow tempering and convection cooling after every cycle and repeat the cycle till seed attains safe moisture content (14%).

Introduction

Financial markets play a critical role in the health and stability of a nation's economy. They act as a complex network where individuals, businesses and governments can exchange financial instruments, facilitating the flow of capital and fostering economic growth. According to the World Bank, the global stock market capitalization reached a staggering $93 trillion USD in 2022, highlighting the vast pool of resources circulating within these systems. At the heart of financial markets lies the ability to connect those who possess capital with those who require it (Karpova et al?, 2020). Companies seeking to expand their operations can raise funds by issuing stocks or bonds, essentially selling a piece of ownership or a promise to repay a loan with interest. Investors, on the other hand, can utilize these markets to put their money to work, seeking returns on their investments through dividends, interest payments, or capital appreciation. This efficient allocation of resources fuels economic growth by enabling businesses to invest, innovate and create jobs.

Introduction

Women make essential contributions to the agricultural and rural economies in all developing countries. Their roles vary considerably between and within regions and are changing rapidly in many parts of the world, where economic and social forces are transforming the agricultural sector. Agriculture needs manpower, if the manpower split into gender wise, amazing fact is that the women contribution is greater or equal to men (Chauhan, 2011).That is reason that right from the day the country become independent, it has been trying hard for rural development.

According to the Penguin Atlas of Women in the World, women make up 40 per cent of the agricultural labour force in most parts of the world, while in developing countries they make up 67 per cent of the agricultural workforce (Singh, 2008). Therefore, strengthening and expanding women’s roles and opportunities in agriculture promotes sustainable economic development. Gender inequalities are a measurable and significant limit on agricultural productivity and efficiency, undermining rural economic development. India has paved the way to development by increasing its trade and growth in Agriculture sector. To review the agriculture scenario of our country, it depicted that there is need to pay sincere attention towards the human resource development (men and women together) because modernizing agriculture needs skill and efficient work forced. Farm business has become a family enterprise in India, where both men and women take part evenly. It is well known fact that the success of rural development process largely depends on the participation of people at large, irrespective of sex. The problems of involving women’s participation in the development process are now catching the attention of planners and policy maker because of increasing imbalances generated out of development process. Now days, rural women play a vital role in domestic and socio-economic life of the society and therefore, national development is not possible without developing this important and substantial section of our society (Okafor, 2008).

7.1  Write True/False

Q.1    All the problem of statistical inference may be considered as the problem of “Decision making in the face of uncertainty.”
Q.2    The problem of point estimation is the problem if deciding which value in the “parameter space” Wq is the true value of the parameter.

Soil Organic Matter

Soil organic matter plays an important role in the maintenance and improvement of soil properties. It is a dynamic material and is one of the major sources of nutrient elements for plants. Soil organic matter is derived to a large extent from residues and remains of the plants together with the small quantities of animal remains excreta, and microbial tissues. Soil organic matter is composed of three major components i.e. plant residues, animal remains and dead remains of microorganisms. Soil organic matter comprises residues of plants and animals and these compounds occur in soil in close combination with inorganic substances. Animals and plant residues are made up of complex carbohydrates, simple sugars, starch, cellulose, hemicellulose, pectins, gums, mucilage, proteins fats, oils, waxes, resins, alcohols, aldehydes, ketones, organic acids, lignin, phenols, tannins, hydrocarbons, alkaloids, pigments, etc.

The organic matter subjected to microbial decay in the soil comes from several sources like plant remains, forest litter, incorporation of plant tissues, animal tissues, and excretory products. The chemistry of organic matter is very complex, and investigations of the transformations and the responsible organisms have therefore been extremely interesting. The organic constituents of the plants are commonly divided into six categories.

Soil organic matter is among the most complex materials existing in nature. In addition to the organic constituents present in undecayed plant and animal tissues, soil organic matter contains living and dead microbial cells, microbially synthesized compounds and an endless array of derivatives of these materials produced as the result of microbial activity. Soil organic matter probably contains most of the naturally occurring organic compounds. Some components of soil organic matter are no doubt distinctive to the soil environment, particularly those involving inorganic-organic complexes.

6.1. Composition of Soil Organic Matter

The composition of soil organic fraction is as follows:

1. Components of organic residues undergoing decomposition

7.1 General Description

Shifting cultivation is a type of land use that dates back to the dawn of agriculture. It's done in places where forest resources are still plentiful. It usually refers to the gradual transformation of primary forests into a mosaic of secondary forests at varying stages of growth, rather than the complete abolition of forests. However, primary forest removal occurs gradually in order to preserve the same fallow time despite population development. As no primary forests remain (or as the remaining primary forests are entirely protected by local customs or conservation legislation), secondary forests fade away, and new techniques arise or are adopted, the fallow period shortens. Natural capital is gradually replaced by man-made productive capital, or the system approaches a state of crisis, depending on whether the limitations to these changes can be levered. In theory, the new land uses allow for more forest protection because they require less territory to provide the same output. In practice, they are triggered or triggered by a series of more radical changes, such as infrastructure development, migrations, financial investments, and new consumer habits, all of which frequently end in large-scale deforestation.

Deep learning emerged as a serious contender in the field from a 10-year explosive computational development. Deep learning is therefore a special form of machine learning, the algorithms of which are based on the structure and function of the human brain.

Machine learning VS Deep learning

Deep learning is arguably the most efficient form of machine learning. This is so important because they know the best way to solve the problem and how to fix everything. The following is a description of deep learning and machine Learning:

Abstract

Now-a-days non bovine milk become an area of interest for their potential to provide nutrients along with beneficial health effects. Deer belongs to cervidae family, is one of the source of non bovine milk. Two thousand years ago, the people of Soviet Union along the borders of Russia, Mongolia, and China used to consume deer milk and milk product. Deer milk is a plentiful source of milk solids. The proteins of deer milk is more digestible than bovine milk owing to their unique profile and characteristics. Deer milk being rich in highly digestible protein offers beneficial health effect through bioactive peptide production. The distinctive physico-chemical properties being quite similar to sheep milk shows the milk product manufacturers a scope to use deer milk for production of various dairy products. Although there is immense opportunity to use deer milk for development of diversified functional products, further research work is needed to be carry out to find out the type of biopeptides produced during protein hydrolysis, role of fatty acids, effect of different unit processing on its constituents etc. This chapter delineates the nutritional profile and physico-chemical properties of deer milk along with the significance of it in terms of its therapeutic roles and potential to be used for product development.

A. Answer the following.

Q.1.    What is nude mouse ?
Ans.     Nude mice are strain of hairless  mice that fail to develop functional thymus and  devoid of CMI.

B.  Write true or false.

Q.1.     Individuals who fail to develop a functional T cell system will die from viral infections.
Ans.    True.

Q.2.    Individuals who fail to develop a functional B cell system will die from bacterial  infections.
Ans.    True.

Introduction

Resistance to disease in a host plants is a condition in which the plant conquer the pathogen’s attack and thus suffers small or no injury. Resistant hosts prevent or slow the development and reproduction of the majority of pathogen propagules that they come into contact with. Different plants defend themselves in different ways. Each kind of plant, probably, employs different defense mechanism against each of the pathogens that attack it. The defense barriers erected by plants are a co-ordinated system of molecular, cellular and tissue-based responses to pathogen attack.

Farming of fish and shellfish has gained significant grounds in several parts of the world. However, the major bottleneck to successful farming is disease in farmed aquatic animals. In recent years, lot of attention is being given to health management using various forms of immunoprophylactic measures such as vaccination and immunostimulation. To rationalise immunoprophylactic applications, it is vital to have insight into the specific and non-specific defense mechanisms of farmed aquatic animals. Through disease process studies it is very well known that a pathogen can cause disease only if it can overcome the non-specific and specific defence barriers of the host and successfully establish and proliferate. Non-specific and specific immune systems are the two main branches of the defense system. The immunity which an organism derives against a pathogen is the result of a delicate interaction and cooperation between the two systems.

Defense System of Fish

Surface Barriers as Local Immune System

The immune systems present in the surface structures of fish have their potential importance in local immune responses. Important surface barriers are skin, gills and gastrointestinal tract.

1. INTRODUCTION

Plant diseases are major constraints to plant growth and development (from seed to maturity) resulting in crop losses. Plants are exposed to attack, by a wide variety of microbes like bacteria, virus, fungi, phytoplasma and as an abnormality they cause disease. To counter these threats, plants have evolved a series of defense systems in response to the pathogen challenge inhibiting natural resistance. Thus disease is an exception rather than rule. However on failure of the inbuilt resistance mechanism, outbreak of disease has led to the widespread use of chemicals that have deleterious environmental and human health consequences. To enable the development of more effective and durable resistance against pathogens, a detailed analysis is necessary to identify the genes and mechanisms involved in plant defense/resistance.

Recombinant DNA and gene transformation technologies have potential to augment traditional breeding efforts (limited by genetic variability) by circumventing taxonomic limitations to gene pool for pathogen resistance. Further manipulation of defense genes in transgenic plants provide novel approaches for engineering pathogen resistance. It becomes important to understand the different components of plant defense to exploit host plants for resistance Thus the review is focused on plant genes and proteins that are known to play a major role in plant resistant against pathogens.

Philosophy of defence in plants

Plants cannot move and must resist or tolerate co-located pathogens.

Plants have evolved very powerful preformed defense systems in the form of structural and toxic barriers.

Plants cannot keep intruders out, they can only limit (contain) them.

Plants can tolerate more nutrient runoff. They often sacrifice a piece of tissue to contain pathogens.

Introduction

Chemical warfare involves using the toxic properties of chemical substances to kill, injure or incapacitate an enemy.

Chemical warfare is different from the use of conventional weapons or nuclear weapons because the destructive effects of chemical weapons are not primarily due to any explosive force. The offensive use of living organisms (such as anthrax) is considered to be biological warfare rather than chemical warfare; the use of nonliving toxic products produced by living organisms (e.g., toxins such as botulinum toxin, ricin, or saxitoxin) is considered chemical warfare under the provisions of the Chemical Weapons Convention. Under this Convention, any toxic chemical, regardless of its origin, is considered as a chemical weapon unless it is used for purposes that are not prohibited (an important legal definition, known as the General Purpose Criterion)

Chemical warfare involves using the toxic properties of chemical substances to kill, injure or incapacitate an enemy.

Chemical warfare is different from the use of conventional weapons or nuclear weapons because the destructive effects of chemical weapons are not primarily due to any explosive force. The offensive use of living organisms (such as anthrax) is considered to be biological warfare rather than chemical warfare; the use of nonliving toxic products produced by living organisms (e.g., toxins such as botulinum toxin, ricin, or saxitoxin) is considered chemical warfare under the provisions of the Chemical Weapons Convention. Under this Convention, any toxic chemical, regardless of its origin, is considered as a chemical weapon unless it is used for purposes that are not prohibited (an important legal definition, known as the General Purpose Criterion)

4.1. Deficiency symptoms in different plant parts

Nutrients are important for growth and productivity of crops. Apart from the N, P, K, Ca, Mg and S, micronutrients such as Zn, Fe, Cu, B, Mo, Mn, Cl, etc. are also necessary for maintaining normal health and metabolism of plants. However, nutrient deficiency can lead to poor and stunted growth of plants resulting in poor yield performances. The depletion of nutrients from the soil is increasing due to adoption of modern agricultural technology through intensive and extensive cultivation of high yielding varieties. Nutrient deficiencies are very common in horticultural crops rather than in field crops.

Identification of nutrient deficiencies in crop plants through visual symptom is the cheapest diagnostic technique. When a nutrient element insufficiency occurs, below the critical level, visual symptoms may or may not appear, although normal plant development will be slowed. When visual symptoms occur, such symptoms can frequently be used to identify the source of the insufficiency.

2.1. GENERAL DESCRIPTION

Forests covered only 31 per cent of the land in the world in 2011, while land used for agriculture, (cultivable land, perennial crops and pastures), covered 38 per cent (FAO 2011). In the history of humankind, agriculture is a recent invention (Mazoyer and Roudart, 2005). With the transition from the huntergatherer lifestyle to one of agriculture during the Neolithic Revolution, farmers quickly expanded their activity into forest areas. They developed shifting cultivation, an agricultural practice with temporal rotations in forest ecosystems. Shifting cultivation still exists today in tropical regions and is the livelihood basis for hundreds of millions of people (Mertz et al., 2009). The range in the population estimate is extremely wide, because of difficulties in counting smallholders spread out under the tree canopy at the margins of tropical forests, as also due to confusion that exists in differentiating shifting cultivators from other farmers involved in small-scale agriculture (Thrupp et al., 1997).

Introduction

Any work condition revolves around three main components - the man, machine and environment. 'Man'-is represented by the worker who is either the controller or the executor of an action. Therefore the work output depends on how efficiently the workers are performing. In this context, the health of the worker is of utmost importance. It is one of the prime supporting pillars of productivity. If the health condition declines, efficiency is reduced and productivity suffers. Work involves a variety of physical and cognitive activities performed to achieve a desired or specified productivity. It may include a single individual or a small or large group of people as the worker. It is characterized by a specified duration, specific speed or work pace and a required amount of effort. The performance and efficiency expected from the workers have a direct bearing on the work process or work tool and the work environment. All these stress the bodily systems and affect the health of the worker. The stress could be classified as physiological stress and psychological stress Occupational health deals with the study and maintenance of physical, mental and social well-being of workers in the workplace (WHO, 1957). Occupational Physiology and Ergonomics are related branches of Occupational health that are in particular concerned with the study and maintenance of health and well-being during work.

1.1. General Discussion of Milk

“The cow is the foster mother of the human race. From the days of the ancient Hindoo to this time have the thoughts of men turned to this kindly and beneficent creature as one of the chief sustaining forces of human life”.

William Dempster Hoard (1836-1918)
Former Governor, State of Wisconsin, USA (1889-1891)
Founder of Hoard’s Dairyman (1885)

The oldest written records of the human race are in Sanskrit and are preserved in India. At the time these records began, about 6,000 years ago, milk had already become an important article of food. In fact, so important was the cow to these early people of South and Central Asia that wealth was measured in numbers of cattle, and the cow was in time made a sacred animal and is still so considered in India.

According to the best authorities, the domestication of cattle must have occurred somewhere between 6,000 and 10,000 years ago. The cow was worshipped in Babylonia, and in Egypt about 20,000 B.C. Over fifty references to cows and milk are found in Old Testament and the Promised Land was described as “a land flowing with milk and honey”.

Milk is the only food of the young mammal during the first period of its life. The substances in milk provide more energy and the building materials necessary for growth. Milk also contains antibodies which protect the young mammal against infection. A calf needs about 1000 litres of milk for growth, and that is the quantity which the primitive cow produces for each calf. There has been an enormous changes since man took the cow into his service. Selective breeding has resulted in dairy cows which yield more than 5,000 litres of milk per calf, i.e. five times as much as the primitive cow. Some cows can yield 10,000 litres or more.

Agricultural finance generally means studying, examining and analyzing the financial aspects pertaining to farm business, which is the core sector of India. The financial aspects include money matters relating to production of agricultural products and their disposal.

What are Pesticides?

Pesticides are essential tools for controlling harmful and invasive pests in agriculture, forestry, and the landscape. Pesticides are any substances used to prevent, eliminate, repel, attract, or diminish pest organisms. Pesticides that are well-known include insecticides, herbicides, fungicides, and rodenticides. Growth regulators, plant defoliants, surface disinfectants, and several swimming pool chemicals are among the others. Insecticides include pesticides (effective against insects), herbicides (effective against certain plants), rodenticides (effective against rats), bactericides (effective against bacteria), fungicides (effective against fungi) and larvicides (effective against larvae).

Disease in plants defined as the series of invisible and visible responses of plant cells and tissues to a pathogenic organism or environmental factor that result in adverse changes in the form, function, or integrity of the plant and may lead to partial impairment or death of plant parts or of the entire plant.

A pesticide is any material intended to prevent, destroy, repel, or mitigate any pest, which is defined as a living organism that occurs where it is not wanted or that causes damage to crops, humans, or other animals. There are many different types of pesticides, each is meant to be effective against specific pests. The term “-cide” comes from the Latin word “to kill.”

6.1 general description

Between 13,000 and 3,000 BC, Neolithic period, mountain people in Asia, Africa, and Latin America have practiced shifting cultivation (Mazoyer and Roudart 2006). A cultivation phase, consisting of removing forest and crop production for 1 to 3 years, is followed by a fallow phase, in which agriculture is discontinued to allow soil nutrients to recoup (Conklin 1961). Conklin (1961) distinguished between total and partial shifting cultivation. Pioneer shifting cultivation, in which primary or apex forest is cleared annually, and replaced by shifting cultivation, which entails clearing mostly secondary forests, are both essential forms of cultivation that are primarily practised for farmers' subsistence. Partial shifting cultivation, on the other hand, is done as a supplemental or temporary activity (Conklin 1961). Throughout history, indigenous peoples have used fire to manage their land and natural resources. Pastoralists and hunters-gatherers in Africa's savannas, for example, have used fire to preserve the ecosystem's productivity for livestock and game for millennia (McClanahan and Young 1996). In pre-colonial times, indigenous peoples in North America also significantly altered the landscape, establishing and preserving pastures and open forest savannas through regulated burning (Pyne 1982, cited in: Schneider 2000).

Herbicides degrade over time. The persists of herbicides is dependent on several factors including light, temperature, and substrate moisture. Several processes are responsible for herbicide degradation and include the following:

    1.    Photodegradation: The decomposition of herbicides caused by duration or intensity of sunlight is called as Photodegradation. Photodegradation occurs when ultraviolet (UV) light breaks chemical bonds of the herbicide active ingredient. Secondary molecules resulting from the cleavage of the parent molecule are generally less effective in providing weed control. Herbicides such as Monuron, Trifluralin, PCP, Chloramben etc are prone to photodegradation. So these herbicides should be applied in evening or incorporated in to the soil just after application in order of avoiding photodegradation.

Land, a non-renewable resource, is central to all primary production systems. Over the years, the country’s landmass has suffered from different types of degradations. Land degradation can be defined as lowering of land productivity due to the deterioration of land’s physical, chemical and biological condition. Physical land degradation is due to water erosion, wind erosion, compaction, crusting and water logging and chemical degradation is due to the processes of salinization, alkalization, acidification and nutrient depletion. Biological degradation is due to the reduction of soil biota and organic matter, degradation of vegetation and impairment of activities of microflora and fauna. Land degradation is steadily increasing due to the growing pressure on land and unsustainable land use. Land degradation and the associated loss of soil productivity and quality is of great concern both from food production and environmental conservation point of view. An ever-increasing population created enormous pressure on land resources.

Flowers and various parts of the plant have been used for decoration and to commemorate various religious, festive, matrimonial and social gathering events in day to day life. The main drawback of fresh flowers and foliage is being highly perishable and delicate which cannot retain their beauty for longer durations. Moreover fresh flowers are not available round the year which can be overcome by the dehydration and drying techniques. Since ancient times, in Egyptian pyramids, fragrant dried flowers and herb garlands were encased along with mummified bodies. Japanese people created “Oshibana”, the “preserved flower art” of enduring designs to retain the exquisite beauty of the living plants centuries ago.

Later on, this craft making technique spread from Japanese to Victorian England because of their beautiful long lasting appearance. During middle ages monks dried flowers, foliage, and herbs for use in decorative motifs or for colouring their handprinted books.

Dried flower arrangements have been popular in Europe for centuries, and as early as 1700 AD, colonial Americans used dried flowers to brighten their homes, especially during the dark winter months.

Earlier botanists practiced dried flowers in the form of herbarium for the purpose of identification of various plant species. Though drying of flower was well known even in the past but for the first time the flowers were dried commercially in Germany (Sankari and Anand, 2014).

INTRODUCTION

Drying or dehydration is defined as the removal of moisture from its initial level to a level which renders food materials safe for subsequent storage. It is a simultaneous heat and mass transfer operation in which heat is supplied externally to evaporate moisture and air is forced through the bed to carry away the moisture. Drying is the oldest technique to preserve food materials. Advantages of drying include reduction in water activity, enhancement of shelf life, maintenance of flavor and nutritive value, and reduction in packaging and transportation costs. When the water activity of the dried product is reduced to below 0.6, most microorganisms do not grow and the rates of other deteriorative reactions are substantially reduced.

Drying is the oldest known method of preserving food. Drying or dehydration is removal of majority of water contained in fruit or vegetable. Although preservation is the primary reason for dehydration, it also lowers cost of packaging, storing and transportation by reducing both weight and volume of final product. In addition, dried foods add variety to our diets. In the process of drying, sufficient moisture is removed to protect product  from  spoilage. Processing should be done in such a way that food value, natural flavour and characteristic cooking quality of fresh material are retained after drying.

Materials Required

Dehydrator, balance, thermometer, sulphur dioxide, blanching pan, fruits / vegetables, polythene or aluminium bags.

Procedure

    1.    Select sound fruits or vegetables 
    2.    Record their initial weight and wash them properly in plain water to remove any dirt or extraneous matter. 
    3.    Peel with stainless steel knife (as the case may be) and cut into thin uniform pieces or slices of  0.2-0.5 mm thickness
    4.    Blanch the slices in boiling water for 1-2 min. to inactivate the enzymes followed by immediate cooling.
    5.    Treat the slices with sulphur (sulphuring or sulphiting) in order to prevent darkening of the product during drying. 
    6.    Dry the slices in a mechanical air dehydrator at about 55 + 5oC temperature.
    7.    Record the weight of the product after every 2 hr till it becomes (almost) constant i.e. when there no more (significant) loss of moisture from the product.
    8.    Pack the product in ploythene or aluminium laminated pouches and seal them air tight. 
    9.    If it is to be converted into powder, the dried product can be ground in a grinder before packing.
    10.    Label the packages and store them in a cool dry place.
    11.    Plot the drying rate curve of the product on a graph paper and analyse it.
    12.    Record the initial and final moisture content of the product (as discussed in Exercise No. 19). 

48.1. Aim

To conduct practical on drying of fruits

48.2. Theory

Drying generally refers to the method of removal of moisture from the food under natural condition such as sunlight and wind for example open sun drying, shade drying etc. Dehydration refers to a process of removal of moisture by application of artificial heat under controlled conditions of temperatures humidity and air flow. It also represents drying of agricultural commodity to dry state. For drying, single thin layer of fruit and vegetables, either whole or sliced after primary pre-treatments is spread on the trays which are then placed inside the dehydrator or in the open sun for drying. In the dehydrator initial temperature is generally kept at 43oC which is then gradually increased to 66-71oC for fruits.

49.1. Aim

To perform practical on drying/dehydration of different vegetables.

49.2. Theory

Drying refers to the method of removal of moisture content from the food to a level at which the activities of food spoilage and food poisoning micro-organism are inhibited. Therefore, reduction in water activity of the food is the main principal of preservation by drying. In the dehydrator initial temperature is generally kept at 43oC which is then gradually increased to 60-66oC for vegetables. The product shall be prepared from wholesome vegetables free from blight, insect infestation and fungal discoloration. Only edible portion of the vegetables shall be used and it shall be free from stalks, peels, stems, and extraneous matter. The dried/dehydrated vegetable may contain permitted preservative. The finished product shall be of good edible quality and shall reasonably reconstitute to its original shape and quality on boiling for 15 minutes to an hour. The finished product shall be free from visible mould, insect or larvae. Kind of dry vegetable shall be declared on the label. Acid insoluble ash shall not be more than 0.5%.

1 What percentage of body weight is intracellular water

a) 60 b) 40

c) 20 d) 15

Key Points

• Fluid therapy is crucial for saving dehydrated animals.

• Fluid therapy should be administered within the first 4-6 hours of treatment.

• Ringer lactate is the recommended fluid for diarrhea and enteritis.

• Fluid loss of 4–6 % does not require therapy and does not show any clinical indications.

Introduction

Dehydration is defined as an excessive loss of water and electrolytes from the body (usually due to vomiting and/or diarrhea) or an insufficient intake of water. The body loses water through respiration; however, the skin, face, and/or urine can also cause dehydration. Diarrhea (the loss of fluid and electrolytes from the gastrointestinal tract) is invariably accompanied by dehydration. Chapter 13 provides a brief overview of diarrhea and how it is managed. Dehydration causes lethargy in the patient and, if handled, can have catastrophic consequences for the kidneys and/or other internal organs. Death may occur if the body loses 40% of its water.

Biological activity or index of a soil is the function of number of organisms present in soil and their physiological efficiency. The rate of respiration can be used as an index of the biological activity of soil as it reflects the physiological efficiency of the organisms. Monitoring of dehydrogenase, which are respiratory enzymes and integral part of all soil organisms, will give a measure of biological activity of soil at a given time.

During respiration biological oxidation of reduced compounds occur which is catalyzed by dehydrogenase. In the process TTC gets reduced to a pink coloured compound Triphenyl formazan (TPF) which can be quantitatively extracted by methanol and measured colorimeterically. The soil dehydrogenase activity in the current experiment was measured as per the methods of Cassida, (1977).

As discussed in the previous chapters, the global perspective of frost is a latitudinal phenomenon; it is more common in subtropical latitudes (23.50 to 350 N&S). The proneness of vegetation to frost usually increases as we move toward the poles. But, at the micro-level, there are several factors like proximity to a water body, type of soil, type of vegetation, prevalence of winds etc., which govern the temperature inversion and frost-proneness of a situation or site. 

Introduction The fish is an important source of protein as it constitute about 17 of the total animal protein (SOFIA, 2018) and the rising demand for fish has led to unsustainable exploitation of marine and inland water resources and fishstocks are getting overexploited, due to which the output from capture fisheries is uncertain. This has put difficulty for the management of our open water resources. It is now urgent to develop a management strategy for conservation of natural resources for future generation as our responsibility. Hilborn and Walters (1992) define stocks are arbitrary groups of fish large enough to be essentially self-reproducing, with members of each group having similar life history characteristics. Stock is defined as "a part of a fish population usually with a particular migration pattern, specific spawning grounds, and subject to a distinct fishery" by the International Council for the Exploration of the Seas. Understanding the importance of delineating the stocks and their boundaries which have become an essential part of fishery management and conservation.

Abstract

Apple orchardist’s are adopting micro irrigation system for irrigation and application of  fertilizers. The feasibility of delivery of pesticides through micro irrigation for the management of diseases and insect pests was evaluated. The minimum root rot incidence (30.55%) was recorded at low fertigation dose + aureofungin (100ppm)+ copper sulphate (100ppm) at two-week intervals as compared to control (61.10%) and it also delayed the symptom appearance by one month. At higher fertigation dose + aureofungin (100ppm) + copper sulphate (100ppm) there was increase in disease incidence as compared to the control (without fertigation). Continuous maintenance of soil moisture at field capacity (FC) enhanced the disease incidence where the overall disease incidence was 63.88 per cent as compared to 27.77 per cent in irrigation at 40 per cent FC. Fungicides applied at bi-weekly interval recorded less disease incidence. The fertigation levels did not affect powdery mildew severity; however, irrigation levels influenced it.  Plants maintained at 40 per cent FC showed less disease severity as compared to those maintained at 100 and 60 per cent FC.  Plants receiving hexaconazole dose at weekly interval depicted less disease than 2 or 4-week interval. The number of colonies and population of woolly aphid were  less on the plants treated with chlorpyriphos.

Introduction

Climate change is the long-term alteration of temperature and meteorological conditions in the Earth’s atmosphere. It is caused by unsustainable human activities such as burning fossil fuels, deforestation, and rampant industrialization which released massive quantities of greenhouse gases into the atmosphere. These gases trap heat from the sun and cause the planet to warm, resulting in various impacts on the environment and human society. Climate change is likely to disrupt the monsoon patterns and lead to more extreme weather events such as droughts and floods. This will have a significant impact on crop yields and food security in India, which is already facing a growing population and increasing demand for food. Additionally, rising temperatures and changing rainfall patterns may also lead to the spread of new pests and diseases, further exacerbating the challenges faced by Indian farmers.

Additionally, climate change impacts are disproportionately affecting the livelihoods of smallholder and resource-poor farmers, who are more vulnerable to weather-related risks and have fewer resources to adapt. The Indian government and private sector are implementing various measures to help farmers adapt to changing conditions, but more needs to be done to ensure the long-term sustainability of the sector. The agricultural sector in India is particularly vulnerable to the impacts of climate change, as it employs a large portion of the population and is a major contributor to the country’s economy. The Indian government and various organizations are working to develop strategies and technologies to adapt to the changing climate and mitigate the effects on the agricultural sector. Time to time the Indian government have implemented various policies and programs to improve the productivity and profitability of the agricultural sector, including the transfer of technology and extension services.

13.1. Introduction

The Delphi technique is a systematic, interactive forecasting method that involves gathering expert opinions to make informed decisions, predict future trends, or address complex problems. The core idea behind this technique is to use the knowledge and insights of experts in a structured manner to produce well-informed and reliable outcomes. By combining expert judgment with iterative feedback, the Delphi method allows for deeper analysis, greater accuracy, and a better understanding of complex issues that cannot be easily solved through traditional data analysis or quantitative methods (Ismail and Taliep, 2023).

Originally designed for defence-related forecasting, the Delphi technique has since evolved into a versatile tool used across a wide range of fields, such as business, healthcare, education, public policy, environmental science, and social research. Its versatility stems from its ability to gather expert opinions in a manner that allows for rigorous analysis of complex issues, without the constraints of traditional group meetings or face-to-face discussions.

Demand & Sales Forecasting

Demand: Demand usually means effective desire/ willingness for a product. It normally refers to the quantity of a product or services which the buyers are likely to purchase at different prices in a given market at a given time.

The laws of demand states that the price and quantity demanded are inversely related, other things remaining the same (income, tastes, habits, weather, season, region, price of related commodity etc.).

Demand: Wants that are supported by a price at which they can be purchased are called demand. It is a relationship that, ceteris paribus, depicts the various quantities of a good that buyers would be able and willing to buy at various prices at a particular point in time.

Demand Schedule: It is a table that displays different quantities of a good that consumers would be willing and able to buy at different prices at a specific moment, ceterius paribus.

Demand curve: A demand schedule is a graph that displays the various quantities of a good that buyers would be able and willing to buy at various prices at a specific point in time, according to Ceterius peribus. It in turn fuels growth by increasing demand for industrial goods..

The arc slopes left to right in a descending direction.

Introduction

Food security problem has multiple dimensions that range from ensuring the food supply at global, country and local levels to create its effective demand round the year. The ultimate goal of an effective food security policy is to provide individuals with adequate dietary requirements through availability and accessibility of food, which are necessary conditions for nutritional well being. The level of food security existing in a country, however is a complex interactions, operating at different levels from the macro to the micro level. The components of the system would include international trade and macro policies, the agricultural sector, the market economy, consumption pattern, the micro economy or household income, urban-rural differentiation and gender issues, etc.

Food insecurity is a complex issue having several dimensions such as, poverty, unemployment, famine, gender discrimination, inequity, starvation, food and nutritional practices, for human growth, natural calamities and so on. Poverty has been recognized globally both as a cause and consequence of food insecurity. In the mid 1980s, 72 per cent of the world’s poor and 66 per cent of the world’s extremely poor lived in the Asia-Pacific region. In this region, 272 million people would suffer from chronic malnutrition during the next decade i.e. in the year 2010. In Asia-Pacific region, India alone has 204 million undernourished people, which is quite alarming when compared with neighbouring countries like China, which has only 164 million undernourished people despite being much populous than India. World Health Organization (WHO) report (1998) points out that health expectancy is more important than life expectancy. The impact of poverty and malnutrition on health has widened the gap between the rich and the poor.

ABSTRACT

Kadayampatty Panchayat Union is situated in the northern part of Salem district, adjoining the Dharmapuri district of Tamil nadu. It lies between the latitudes 11°45’ -12°N and longitudes 78° -78°15’E in the Toposheet No.58I/1. The study area mainly consists of the rocks of late Precambrian age that are characterised by migmatitic gneisses, Ultramafic rocks and Pyroxenite. In this study an attempt has been made for demarcating groundwater techniques. Resistivity of rock formation varies over a wide range, depending on the material density, porosity, pore size and shape, water content, quality and temperature. In relatively porous, highly jointed and fractured formation the resistivity is controlled more by water content and quality with in the formation then by the rock resistivity. For demarcating groundwater potential zones in the Kadayampatty Panchayat Union water table analysis and ten Vertical Electrical Sounding (VES) followed by Schlumberger electrode configuration were carried out. The maximum depth of investigation was 150mts. The electrode spreads were generally in steps of five meters interval up to 50 mts and 10 mts interval up to 150 mts. VES location were selected with in the study area with respect to their topographic features. Inverslope method proposed by Sankaranarayan (1974) et.al has been used to evaluate the geoelectrical parameters in order to demarcate to potential groundwater zones for new dug well and bore well locations. The lithological interpretation reveals that the presence of a maximum of five geoelectrical formations in the study area viz. Topsoil, weathered zone, fissure and fractured zone, fracture basement and fresh basement. Howevers all five formations do not occur throughout the study area, as the maximum and minimum of geoelectric layers are four and three respectively. Similarly a thin geoelectric layer was observed in some places also. The comparatively high resistivity values with corresponding high values of thickness are indicative of a wide stretch of unweathered and unfractured fresh rock layers. A highly weathered (saturated) basement is indicated by the extremely low resistivity value. The depth to the fresh basement varies.

Features of Democracy

Democracy is a form of government in which the people have the power to participate in the decision-making process. There are several features of democracy which can helps in the determination of working of Government. The features of democracy ensure that the government is accountable to the people, and that individual rights are protected. These are explained below:

• Free and fair elections: Elections are the cornerstone of democracy, and free and fair elections are crucial to ensuring that the people have a say in the government.
• Rule of law: The rule of law means that everyone, including the government, is subject to the law. This principle ensures that no one is above the law, and that everyone is held accountable for their actions.
• Protection of individual rights: Democracies protect the individual rights of their citizens, including freedom of speech, freedom of assembly, freedom of religion, and freedom of the press.
• Separation of powers: Democracies typically have a system of checks and balances that prevents any one branch of government from becoming too powerful. This separation of powers ensures that no one person or group has too much control.

The word ‘Democracy’ is derived from the Greek roots ‘demos’ meaning the people and ‘kratos’ meaning authority i.e. in democracy, all authority originates from the people. Decentralisation means distribution of functions and powers from a central authority to regional and local authorities. Democratic Decentralisation in the present context means that the Government which has derived its authority from the people, redistributes it to some extent to the people, for decision and action at the local level. This is popularly known as PANCHAYATI RAJ in India. It was thought that Panchayati Raj would emerge as a system of democratic local self- Government, discharging developmental municipal and ultimately, regulatory functions.

Etiology

Demodecosis is caused by Demodex species follicular mite with increased numbers. But, it is generally caused by Demodex canis. It is divided into two forms – juvenile and adult forms. The juvenile form is more common. This condition may be localized or generalized in nature.

True/False

Q.1.    Demographic data and vital statistics are important tools for researchers, epidemiologists, health planners and health professionals.
Q.2.    The distribution of people across different geographic regions is known as population density.

Introduction

Agriculture is the back bone of Indian economy. About 18.8 percent (2021-22) of the national income originates from the agriculture sector. Approximately 60 percent of India’s population is directly or indirectly dependent on agriculture for livelihood. A large number of important industries like jute, textiles, edible oils, tobacco, sugar etc. receive the raw materials produced by agriculture sector. India occupies second position in the production of fruits and vegetables in the world after China (National Horticulture Database 2019 2020) It is grown almost in all the states of the country.

Cauliflower (Brassica oleracea L. var. botrytis) like all other Brassicaceae family crops has descended through introgression, mutation, human selection and adaptation from a single wild predecessor Brassica oleracea L. var. sylvestris which is still found growing in western and southern Europe and North Africa. The name cauliflower consists of two Latin words namely ‘caulis’ means cabbage and ‘floris’ means flower. It is grown throughout the country for its highly suppressed ‘prefloral fleshy apical meristem’ called “Curd” which is used as vegetable, soup and for pickling (Choudhury, 2006). Cauliflower is the pride of cole crops because of its good taste, flavour and nutritional value. It contains good amount of vitamins like vitamin A, vitamin C and fair amount of proteins and fibers. The cauliflower is also a good source of minerals like Ca, Mg, P, Fe, Na, and S.