eBook Chapters

TEST OF SIGNIFICANCE FOR CORRELATION COEFFICIENT

Coefficient of correlation is a numeric characteristic of a population and is estimated from a sample of the bi-variate population. If ρ be the coefficient of correlation in the population and r be its sample estimate based on n pairs of observations, then standard error of r is given

9.1 Structure of Silk Gland
The silk of silkworms is secreted by a pair of labial glands, known as silk glands. The silk glands lie ventral to the alimentary canal. In full grown larvae, these occupy most of the body cavity. The silk glands are tubular in shape with different diameters in different regions. Each gland has 3 distinct regions (Fig.9.1).
(1) Posterior Region: Blunt, highly folded tubular posterior regions of both glands remain attached to tracheal bushes of silkworm. This part secretes fibroin as fibrinogen which converted to fibroin upon extrusion.
(2) Middle Region: Most prominent and widest part of silk gland. It remains folded in a W-shaped structure and thus has 3 limbs posterior, middle and anterior limbs. The posterior arm secretes sericin-I. It gets
surrounded by sericin-II secreted from the middle limb. This sericin again gets surrounded by sericin- III secreted from the anterior limb. The middle region of silk gland also acts as the reservoir of fibroin where the
later gets mature during the storage period.
(3) Anterior Region: The thin anterior region of silk gland has no secretory role and only transports the assembled silk to the spinneret.

Objectives

• To study working principles of simple microscope
• Study different parts of simple microscope

Introduction

This is the first ever microscope. It was founded by Leeuwenhoek in 17^th century. He combined a convex lens with a specimen holder, for seeing the magnified images of small objects. It looks like a magnifying glass because it has the capacity to magnify between 200 and 300 times. A simple microscope is a small focal lens used to view the magnified images of small objects. It is just like a hand lens and glass with relatively lower magnification power.

SKEWNESS

Skewness means lack of symmetry. Skewness denotes the tendency of a distri- bution to depart from symmetry. A frequency distribution is said to be skewed if the frequencies decrease with markedly greater rapidity on one side of the central maximum than on the other side. This characteristic of a frequency distribution is known as skewness and the measures of asymmetry are usually called measures of skewness.

The main object of measuring skewness is to know the direction of the varia- tion from an average and to compare the frequency distribution and the shape of their curves.

There are two types of skewness

(i) Positive Skewness (ii) Negative Skewness

Some basic informations about genera of Family Pythiaceae, Peronosporaceae and Albuginaceae;

Pythiaceae

Indeterminate (grows continuously) sporangiophores, have sporangia that are borne variously, but not in chains, on somatic hyphae or on sporangiophores. This family includes the genera Pythium and Phytophthora.

Peronosporaceae

Determinate sporangiophores, form sporangia on well-defined, branched sporangiophores of determinate growth. There are seven genera in the family including Basidiophora, Bremia, Bremiella, Peronospora, Plasmopara, Pseudoperonospora and Sclerospora.

Albuginaceae

Club shaped sporangiophores, catenate sporangia, produces chains of sporangia on club-shaped sporangiophores of indeterminate growth. The Albuginaceae contains a single genus Albugo.

Abstract

Groundwater is one of the major sources of exploitation in arid and semi -arid regions of Rajasthan. To protect groundwater, its data on spatial distribution are important along with quantity. Analysis of quality of groundwater is also very important, because the physical and chemical characteristics of groundwater determine its suitability for agricultural, industrial and domestic usages. The importance ground water increases many fold for arid tracts like Western Rajasthan. Here quality of water is also matter of serious concern. Geostatistics methods are most advanced techniques for interpolation of Groundwater quality. The present study appraises the groundwater quality of western Rajasthan for agricultural purpose with GIS technology. Kriging Raster Interpolation technique of spatial analyst module in Arc GIS software has been used to generate the spatial distribution map of ground water for agricultural purpose. In western Rajasthan only 28% (58109 km2) of ground water falls under the category of good and is suitable for agricultural use. 

FOR GROUPED DATA

Objective: The following data shows the marks of students and their frequencies find the standard deviation and its coefficient.

STANDARD DEVIATION AND THEIR COEFFICIENT

The standard deviation is a measure of the spread of scores within a set of data. Usually, we are interested in the standard deviation of a population. However, as we are often presented with data from a sample only, we can estimate the population standard deviation from a sample standard deviation. These two standard deviations - sample and population standard deviations - are calculat- ed differently. In statistics, we are usually presented with having to calculate sample standard deviations.

STANDARD NORMAL DISTRIBUTION

If μ = 0 and σ = 1, the distribution is called the standard normal distribution or the unit normal distribution, and a random variable with that distribution is a standard normal deviate. The approximate test is given by

t TEST FOR PAIRED OBSERVATION

This test is used for testing whether two series of paired observations are gen- erated from the same population on the basis of the difference in their sample means.

t TEST FOR SINGLE MEAN

A t-test is any statistical hypothesis test in which the test statistic follows a Student’s t distribution if the null hypothesis is supported. It can be used to determine if two sets of data are significantly different from each other, and is most commonly applied when the test statistic would follow a normal distribution if the value of a scaling term in the test statistic were known. When the scaling term is unknown and is replaced by an estimate based on the data, the test statistic (under certain conditions) follows a Student’s t distribution.

t TEST FOR TWO SAMPLE MEAN:

Comparison of two sample means  and assumed to have been obtained on the basis of random samples of sizes n₁ and n₂ from the same population which is assumed to be normal.

ABSTRACT

Trace Elements were analysed from water samples collected from bore wells from block 2, 5, 14, 26 and 29 at Neyveli Township. Lead Concentration has crossed the limit of ISI standard prescribed for drinking which is 0.100 ppm. Lead concentration in the order of 0.082 ppm at block 5 and 0.11 ppm in block 29 were observed. Cadmium concentration has also crossed the limit of ISI (0.010 ppm) for drinking purpose, which is 0.02 ppm in block 26. Chromium concentration has also crossed the permissible limit of ISI standards (0.05 ppm) for drinking, which is 0.098 ppm in Block 14.

The above elements when compared with ISI standards for drinking water have shown a slight increase in concentration of lead, cadmium & chromium. Concentration of lead in Neyveli basin may be attributed to basement geochemical sources influenced by physical and chemical weathering. High concentration of chromium and cadmium in the aquifer may be due to anthropogenic activity probably from effluents of closed briqueting & carbonization plant, which is due south of block 14.

INTRODUCTION
The engine of a tractor is often referred to as its heart, as it drives the machine’s ability to carry out essential heavy-duty tasks in farming. As technology progresses and environmental sustainability becomes a key focus, it is increasingly important for Indian farmers in 2025 to understand the workings of tractor engines. This article aims to simplify the intricacies of tractor engines by covering their types, key specifications, performance features, maintenance, and recent innovations.
Tractors typically use diesel engines, which generate mechanical power through the compression and combustion of fuel. These engines are designed with a complex structure that ensures high power output and durability, which are vital qualities for the demanding work tractors are used for. To effectively meet these needs, tractor engines must be both powerful and built to last. These engines function based on the principles of compression and combustion of fuel. Here is a comprehensive analysis of their attributes and significance:
• High force: Tractor engines must produce significant mechanical force to execute diverse agricultural chores such as plowing, tilling, transporting, and other heavy-duty operations. Diesel engines are especially appropriate for this application due to their capacity to generate greater torque at reduced speeds, which is crucial for managing substantial loads.
• Durability: Tractors are frequently employed in severe locations, operating for extended periods under challenging conditions. Diesel engines are designed to endure the demands of continuous operation, making them preferred for agricultural machines. Their durable construction guarantees enduring reliability and longevity.
• Compression and Combustion: Diesel engines operate by compressing air within the engine cylinder. Upon the injection of fuel into this highly

The two-way ANOVA compares the mean differences between groups that have been split on two independent variables (called factors). The primary purpose of a two-way ANOVA is to understand if there is an interaction be- tween the two independent variables on the dependent variable. For example, you could use a two-way ANOVA to understand whether there is an interac- tion between gender and educational level on test anxiety amongst university students, where gender (males/females) and education level (undergraduate/ postgraduate) are your independent variables, and test anxiety is your depen- dent variable. Alternately, you may want to determine whether there is an in- teraction between physical activity level and gender on blood cholesterol con- centration in children, where physical activity (low/moderate/high) and gender (male/female) are your independent variables, and cholesterol concentration is your dependent variable.

The interaction term in a two-way ANOVA informs you whether the effect of one of your independent variables on the dependent variable is the same for all values of your other independent variable (and vice versa). For example, is the effect of gender (male/female) on test anxiety influenced by educational level (undergraduate/postgraduate)? Additionally, if a statistically significant interaction is found, you need to determine whether there are any “simple main effects”, and if there are, what these effects are (we discuss this later in our guide).

Bunding is a traditional yet effective soil conservation method that involves constructing embankments or barriers along land contours to manage water flow and reduce soil erosion. These embankments, known as bunds, are particularly beneficial in semi-arid and erosion-prone areas, where water conservation and soil stability are essential for sustainable agriculture.
Bunds slow down surface runoff, allowing water to infiltrate the soil rather than washing away valuable topsoil. This not only reduces erosion but also improves soil moisture retention and supports crop growth. Bunds can be made from local materials such as soil, stones, or a combination of both.
TYPES OF BUNDING
There are several types of bunding, each with its unique features and benefits. Let’s explore the most common ones:
Contour Bunding
Contour bunding is a well-established soil conservation technique that involves constructing embankments along lines of equal elevation across sloping terrain. These structures, often equated with level terraces, are designed to intercept surface runoff, thereby reducing soil erosion and improving moisture retention in cultivated lands. Originating as a famine relief initiative in Maharashtra, India, contour bunding has since proven to be an effective and sustainable method for preserving agricultural productivity in hilly and semi-arid regions.
This practice is particularly suited to a wide range of permeable soils, including alluvial, red lateritic, shallow and medium black soils, as well as deep black cotton soils. However, challenges such as soil cracking in black cotton soils may compromise bund integrity, necessitating periodic repair and upkeep.

Terrace farming is a widely practiced agricultural method in India, particularly suited for hilly and mountainous areas. It involves shaping the landscape by carving out flat sections—known as terraces—into the slopes of hills or mountains. These levelled surfaces make it easier to cultivate otherwise steep and challenging terrain. This age-old technique, also known as step farming, creates a series of stepped platforms that resemble a staircase along the hillside. The approach is both practical and resourceful, allowing farmers to use sloped land efficiently for crop cultivation.
The primary motivation behind transforming large hill surfaces into terraces— despite the considerable labor it demands—is to control the rapid downhill flow of water that typically occurs in such regions. However, terrace farming comes with its own set of challenges. The soil on terraces often has limited water retentioncapability, and erosion can become more severe. Nutrients and soil particles tend to be washed away into rivers. In addition, if trees are cleared for farming, the land becomes vulnerable to landslides and mudslides during periods of heavy rainfall. Terrace farming is a prevalent agricultural practice in India, especially in regions characterized by hilly or mountainous topography. This method involves the creation of flat, horizontal plots—referred to as terraces—along the natural contours of slopes. These terraces transform steep, uneven land into cultivable platforms, making farming on such terrain more manageable and productive. Also known as step farming due to its resemblance to staircases carved into hillsides, this traditional technique is both efficient and adaptive. It enables the utilization of sloped land that would otherwise be unsuitable for agriculture. The primary reason for undertaking this labor-intensive process is to manage the rapid runoff of water common in elevated terrains. By interrupting the slope, terraces help slow water flow and reduce surface erosion. Nevertheless, terrace farming poses several challenges. The soil tends to have limited capacity to retain moisture, and erosion can still displace vital topsoil and nutrients. Furthermore, deforestation to create terraces can heighten the risk of landslides and mudflows during intense rainfall.

The chi square is a continuous distribution based on the assumption that the ul- timate class frequency is not less than 5 otherwise the value of χ₂ will be over- estimated and may cause too many rejections of null hypothesis. Therefore, to maintain the continuity of χ₂ and to draw the correct inference in 2×2 we apply a correction which is known as Yates’s correction for continuity.

Abstract

Data pertaining to 1761 records on daily milk yield and 1416 milk samples for estimation of fat and SNF percent in Banni buffalo during the year 2008-10 were collected from the breeding tract under In-situ conservation project on Banni buffalo and utilized for present study. The overall means ± SE for daily milk yield was 09.86 ± 0.07 lit. The month-wise daily milk yield was observed highest in second month, followed by 1st (12.96 ± 0.19 lit), 3rd (12.73 ± 0.19 lit), 4th (11.66 ± 0.20 lit), 5th (10.81 ± 0.25 lit), 6th (09.77 ± 0.23 lit), 7th (08.58 ± 0.18 lit), 8th (07.26 ± 0.17 lit), 9th (06.15 ± 0.11 lit), 11th  (05.70 ± 0.10 lit), 10th (05.41 ± 0.09 lit), 12th (05.78 ± 0.08 lit) and 13th  (05.48 ± 0.63 lit) months of lactation. The data on milk constituents’ viz. fat and SNF percent was grouped according to the seasons of the year and morning – evening milking.

Abstract

Conventional wisdom holds that variability in rainfall represents a significant variability of agriculture production. But urbanization of the cities on one hand and climate change on theother hand areaffecting the agriculture. Surprisingly, there have been very few analyses exploring the link between rainfall variability and urbanization on agriculture production. Therefore an attempt is made in this paper to know the affect of rainfall variability and urbanisation on the cropping area. For this purposeNDVI analysis is carried out in the catchments of Osmansagar and Himayathsagar Reservoirs by using the medium to high spatial resolution multi spectral data provided by remote sensing satellites, such as Landsat TM, IRS-1C/1D LISS-III and IRS-P6 LISS-III has been used for the years1989, 1994, 1998, 2002 and 2008 for Kharif season, 1975, 1990, 1994, 1998, 2003 and 2008 for rabi season which is collected from NRSC (National Remote Sensing Centre). From this analysis it is found that the increment is more in rabi season compared to kharif season due to the increment of non-monsoon rainfall intensities and ground water withdrawal structures. The increased utilization of the groundwater is causing the reduction of inflows to the reservoirs in the recent years because whatever the rainfall that occurs in the catchment, first utilised for meeting the depleted soil moisture and ground water consequently reducing the surface runoff.

Keywords : Climate change, Urbanisation, Inflows, Cropping area, NDVI

ABSTRACT

In vitro culture and cryopreservation techniques are complementary to ex situ conservation of plant genetic resources that are vegetatively propagated or having recalcitrant seeds. An in vitro germplasm conservation study has been conducted on Banana passionfruit (Passiflora mollissima), a plant used in rural medicine. Micropropagated plants survived up to 12 weeks in Murashige and Skoog medium supplemented with 0.5% sucrose. Cryopreservation experiments were carried out on the explants (apical and/or axillary buds), pre-treated with vitrification solutions, dimethyl sulphoxide (DMSO) and PVS2 (Plant vitrification solution-2) with or without desiccation treatment and frozen in liquid nitrogen (LN). The survival and regeneration of apical buds were higher than axillary buds when pre-treated with 15% DMSO. Treatment with 20 % PVS2 for 1 h followed by 100 % PVS2 for 20 min gave maximum shoot recovery (40%) from cryopreserved apical buds. Desiccation alone was not successful but combination of pre-treatment of PVS2 (20% for 1h and 100% for 20min) with 3 h desiccation gave 30% plant survival from frozen apical buds. Regenerated shoots were rooted on MS medium with 1.0 mgl-1 naphthalene acetic acid (NAA) and 0.2 % activated charcoal.

Introduction

Cotton is a fiber crop of Malvaceous family. There are four cultivated species of cotton viz. Gossypium arboreum, G. herbaceum, G. hirsutum and G. barbadense out of which G. hirsutum is the predominant species contributing about 90% to the global production. In India all the above four cultivated species are grown on commercial scale as a kharif crop. India is the largest producer as well as consumer of cotton in the world. The major cotton growing states of India are Maharashtra, Punjab, Haryana, Rajasthan, Uttar Pradesh, Madhya Pradesh, Gujarat and parts of Andhra Pradesh & Karnataka. In Odisha cotton cultivation is an up-coming activity. Many of the western belt farmers, mainly from Rayagada, Bolangir, Kalahandi, Nabarangpur, and Nuapara districts have been taking cultivation of this cash crop. According to the report of Odisha economic survey, 2018-19 a total of 1.45 lakh ha area was cultivated in 2017-18 producing 3.65lakh bales of cotton. In Rayagada district cotton is cultivated in 9 blocks out of 11 blocks comprising an area of 35170 ha. For the year 2018-19 yield was 12.37 q/ha with production of 25.6 MT of cotton according to the data given by District agriculture office, Rayagada.

1. Introduction

Milk is the principal source of protein and lactose in the diet. Dairy farming is viewed as a whole ecosystem of reciprocal relationships and reliance, as well as there production and safe guarding of societal values. Dairy farms are primarily made up of high-yielding dairy cows. Goats, sheep, and camels are some of the other animals employed in commercial dairy production. Milk has always been regarded as a healthy food. Milk includes more than9 other essential elements, including protein, carbs,vitamins, minerals, and lipids, in addition to calcium, which makes it critical for your bones.

Every year, about 600 million tonnes of milk are produced by over 264million dairy cows across the world. The global average for milk output per cow is around 2,200 litres. India is the world’s top milk producer followed by the United States, China,Pakistan, and Brazil. The economy of India is mostly dependent on agriculture and animal husbandry, with milk production playing a significant role. It is also the world’s largest producer of buffalo milk (FAO, 2019).

Co-operative dairy sector proved to be resilient as it continued to procuremilk from farmers and supply it to the consumers despite several logistical and other challenges. Milk production in India did not show any sign of slowdown. Milk productionis anticipated to be around 209.96 million tonnes in 2020-21, an increase of about 6.3 percent over the previous year. The estimated per capita availability of milk is expected to increase to about 425 gms /day which is more than the world average of around 315gms/day(NDDB,2020).The dairy co-operatives had a difficult year due to an influx of more milk production, a reduction in milk sales, and the building of inventories of preserved goods. Throughout the year, milk procurement by dairy co-operatives increased as it accepted diverted extra milk from farmers that would otherwise be sold to private and unorganized businesses. During the 2020-21 budget year, milk procurement by dairy co-operativesincreased by 7.9 per cent. Indian dairy co operatives have installed milk processing capacity of 66.3million litters per day,73.3million liters/day in private sector enterprises, and 2.5 million litres per day in producer companies.

Aim

To study the working principle and cleaning efficiency of air-screen seed cleaner cum grader

Apparatus required

Lab model air-screen seed cleaner cum grader

Seed sample

Weighing balance

Introduction
Any species that has been accidentally or purposely brought outside of its current range by humans is considered an introduced (or exotic) species (Kottelat and Whitten, 1996). According to the International Union for Conservation of Nature and Natural Resources (IUCN), an alien species is considered invasive when it establishes itself in natural or semi-natural ecosystems or habitat, causes change, and endangers the biological diversity of the host species. These invasives encompass all classes of living things and are widely dispersed throughout the world's ecosystems (Raghubanshi et al., 2005). Numerous reasons led to the introduction of exotic fish species in various parts of the world: (a) increasing the potential for local fisheries and diversifying species in aquatic systems; (b) promoting sport fishing; (c) maintaining aquariums; and (d) managing undesired organisms like mosquitoes, etc. (Biju Kumar, 2000). Furthermore, floods and a variety of other factors may allow exotic fish imported into one nation to spread to its neighbors. According to Welcome (1988), 168 fish species from 37 families have been introduced worldwide outside of their native area. At least 67 of these species have established themselves in various bodies of water, with 27 of them turning out to be serious pests. Approximately 20 percent of freshwater fish species worldwide are either extinct or in danger of going extinct (Moyle and Leidy, 1992). Over time, the introduction of new species might prove to be a very harmful issue. Nyman (1991) stated that the introduction of alien species may cause the aquatic environment to undergo permanent alterations and perhaps cause the extinction of some species.
As a result, the careless introduction and movement of aquatic species, especially fish, caused much worry across the world since it led to several issues, including the extinction of native species. Fish native to the area compete with exotics for food and habitat. They might kill local fish, bring in new illnesses and parasites, create hybrids, pollute the genetic pool, and lower the standard of the aquatic ecosystems. The loss of priceless biodiversity will result from all of these (Nyman, 1991). Potential hazards include those that might affect not just biodiversity quality or quantity but also the socioeconomic facets of the human society that depend on aquatic environments for survival (Philipp et al., 1995). Introductions are a legitimate way to increase aquaculture and fisheries productivity and economic advantage. Indeed, the primary driving force behind the migration of fish and shellfish across continents and even geographic regions has been aquaculture. To address the growing need for food and nutritional security, exotic species have been used to diversify fisheries and aquaculture. Species introductions and transfers from one hydrographic

This practical assignment is designed in a way that students will acquire knowledge on various development departments in the district, especially on organizational structure, functioning and activities of any agency like District Rural Development Agency (DRDA).

PURPOSE

To get the students acquainted with the organization and functioning of DRDA.

To give the students a brief idea about the organizational structure and functions of other development departments at district level.

Urban Air Pollution and Its Impact on Roadside Plants
Urban Air Pollution

Modern industrial society produces a large number of gases and particles in quantities to harm human, plant or animal life. The amount of pollutants released to the atmosphere by fixed or mobile anthropogenic sources is generally associated with the levels of economic activity. Deterioration of air quality is a major environmental problem in many urban centers in both developed and developing countries. Automobiles constitute a major source of air pollution in the urban areas. Motor vehicle emissions result from fuel combustion or evaporation. The most common types of transport fuel are gasoline and diesel. CO₂ and water vapors are the main products of the combustion, emitted in vehicle exhaust. The major pollutants emitted from the vehicles are particulate matter (suspended fine and ultra fine), sulphur dioxide, oxides of nitrogen, carbon monoxide and metals.

Introduction
A study protocol tool is a very important comprehensive document that deliberately outlines the whole research rationale design and plan for the successful execution of the epidemiological/ an experimental/ a clinical study. It serves as a blueprint for how the study will be conducted, ensuring consistency, transparency, and adherence to ethical guidelines. The document contains the background information available in literatures on the basis of which the researchers plan to conduct the study with objectives that will answer research related questions with ensuring adherence to ethical standards.
Basic Elements of a Study Protocol
The study protocol includes different components including background Information available in literature for research plan, objectives or purpose of conducting the research, explanation of the study design, selection and exclusion of subjects, treatment of subjects, assessment of outcome safety and efficacy. The purpose of conducting research includes questions like why the study needs to be done and what will be its relevance to scientific society or environment. To achieve these objectives the researchers, design their research work for proper execution of research objectives. The study which is to be designed has structured framework for researchers to answer their research questions and obtain reliable and valid results. The study design not only helps the researcher in learning technical skills but also discovering the creative voice (planning and execution). The study design includes different methods, processes and necessary resources for accomplishment of research problems. The study design also incorporates the methods of data collection and statistical analysis which meets the requirements of desired outcome. The implementation of an appropriate study design guarantees a methodical and exacting research process, resulting in more precise findings and the appropriate type of analysis to address the research-related queries. This makes the conclusions more reliable and legitimate. By ensuring that the data are reliable, repeatable, and validated, a well-designed study contributes to the advancement of knowledge. Additionally, it helps to control biases and confounding variables that could affect the results and helps to clarify the methodology of the study, which

(A) Effect of Temperature
Introduction
Temperature is one of the most important physical factors affecting microorganisms. Bacteria are different from higher plants and animals in the lack of homeostatic mechanism and cannot regulate heat generated by metabolism and are, therefore, directly and readily affected by temperature. Over a limited temperature range, there is a two-fold increase in the rate of enzyme catalyzed reaction for every 10°C rise in temperature.
Bacteria may be divided into three major groups with respect to their temperature requirements: (i) Psychrophiles, those with optimum temperature between 0°C and 20°C; (ii) Mesophiles, with optimum temperature between 20ºC and 40°C and (iii) Thermophiles, with optimum temperature between 40°C and 80°C. Thermophiles are of two types: (a) Facultative thermophiles with an optimum temperature of growth between 45°C and 60°C and (b) Obligate thermophiles with optimum temperature above 60°C. Temperatures in the range between 50°C and 100°C are normally in the lethal range for bacterial cells and spores. The range of temperature preferred by bacteria is genetically determined, resulting in enzymes with different temperature requirements.
Each organism grows within a particular temperature range (i.e. cardinal temperature points). The minimum growth temperature is the lowest temperature at which growth of a species will occur. The highest temperature at which a species can grow is its maximum growth temperature, and a species grows fastest at its optimum growth temperature.  Time of exposure is a vital factor in assessing the

(Method of Cocimano and Leng, 1966; Conrad, 1972; Varady & Harmeyer, 1972)
Hypothesis

The validity of measuring urea kinetics using a single dose of ¹⁴C-urea and using urinary excretion as a sampling system is based on specific assumption:

    1.    There is a rapid equilibration of ¹⁴C-urea with the endogenous urea pool following infusion. This pool is conceived to be a measure of all body compartments permeable to urea and in equilibrium with the plasma urea pool. 

    2.    Experimental animals are metabolically maintained in a steady state during the test period and metabolic breakdown of urea is random.

    3.    Specific radioactivity for urinary urea is proportional to the dilution of replenishment and simultaneous depletion rate of the urea pool.

    4.    That the metabolic parameters of urea are correctly measured.

Introduction

Although the causative agent for the condition has not been identified, experimental studies indicate the association of parvovirus and or Astrovirus. Under experimental conditions, the virus induces clinical signs onlyin fast growing broiler chickens. The clinical signs, based on experimental inoculation of chickens, consist of watery or mucoid mustard yellow colour diarrhoea within 3-5 days after infection. Chickens become stunted, and a variable number of such chickens die during 10 and 20 days. Pronounced weight loss is in around four week’s age. The mortality is low (5 - 10%) however, the morbidity is very high (50 - 80%).

The style of technical communication focuses on delivering information clearly, concisely, and accurately, often in a professional or academic
context. Technical communication is typically used in fields such as science, engineering, technology, and medicine to convey complex data or instructions to a specific audience.
Characteristics of Technical Communication Style
• Clarity: The message should be easy to understand without ambiguity.
• Conciseness: Information is conveyed using as few words as necessary.
• Accuracy: The content must be precise and free from errors, especially when explaining technical data.
• Objectivity: The style is factual and free from personal bias or opinions.
• Consistency: Terminology, units of measurement, and formatting should remain consistent throughout the document.
Types of Technical Communication
• Instructions/Manuals: Step-by-step guides for completing a task or operating machinery.
• Reports: Detailed documentation of findings or research.
• Proposals: Formal suggestions for a project or plan.
• Emails/Business Letters: Professional correspondence.
• Presentations: Visual and oral methods of conveying technical information.

Style of garden holds a distinctive appearance, typically determined by the principles according to which gardening can be worked out. There are basically four styles of gardening that are followed to establish any garden. Brief of them are given below.

Garden lover has to invent their own styles of gardening commensurate with their climate of site, budget and taste. Gardens fall under three categories when it comes to style - formal, informal and wild.

1. Formal style gardens

Formal style gardens are beautiful in the view and have been popular for thousands of years. Granted, it is not to everyone’s taste but it creates a certain magnificence and persistence that will probably have meaning and importance in garden design for many more years in the future. A formal garden is laid out in a symmetrical or a geometrical pattern. Symmetry is the main characteristic of this style of gardening. Geometrically designed landscapes with trimmed hedges, paired flower beds, straight line planting and equal length of the sides of the area are the main features of formal or symmetrical gardening. The formal design is stiff as all garden features in a straight and narrow way. In the formal design, the land is forced to fit in the plan. In this type, an axis is drawn in the centre of the garden which divide whole of the garden in two equal halves, one half being the exact replica of the other, for every feature, element or adornment. The outline of the whole garden as well as the outline of different parts like flower beds, paths, hedges and lawns are of geometrical shape. These shapes are normally square, rectangular,oval or circular.

The Persian gardens, Mughal gardens and Italian gardens were formal in design. Geometrical formalism also influenced the French and British gardens of the pre- Industrial Revolution.

I. General information

1. Formal type of garden is laid out in a symmetrical or a geometrical pattern
2. Features of a formal garden are trimmed formal hedges, cypress, ashoka trees
3. Informal type of garden in which all plants and features are arranged in a natural way
4. Wild garden was laid out by William Robinson
5. Examples for formal type of gardens are Mughal, Persian, Indian and French style
6. Examples for informal type of gardens are English and Japanese garden
7. Main features of English garden are lawn, herbaceous border and rockery
8. Main features of Italian garden are massive flight of marble stairs, decorative urns, fountains
9. Mughal type of garden is a replica of ancient Persian garden

3.1 Introduction

Many gardens follow strict rules. So those are known as formal gardens. Generally formal gardens include:

Italian gardens

French gardens

Persian gardens

Mughal gardens

4.1 Introduction

Many styles of gardens do not follow strict rules and so those are known as informal gardens. Some gardens evolved as informal garden in due course of time as per the choice of people but some gardens are informal in nature from origin. Informal gardens are:

English garden

Japanese garden

Hindu garden

Buddhist garden

Sub estrus (Weak or Silent Estrus) is a condition in which there are normal cyclical changes in the reproductive organs of a cow but the heat signs are not exhibited to a level of intensity as in normal cows leading to failure of estrus detection by a farmer. This condition is common during post partum period. It is a common reproductive problem in cattle affecting the productivity and economics of a cow due to increase in inter-calving interval, production loss, treatment expenses etc.

1. INTRODUCTION

This chapter looks at ICTs in Sub-Saharan Africa (SSA), with a focus on several selected countries in the region. Exciting and positive developments are happening throughout SSA Africa in ICTs. For instance, in spite of extensive poverty, SSA has had the fastest growing mobile market in the world over the last five years. The mobile telephone in the region has morphed to serve uniquely African development needs, including those in rural areas. It is being used for market information, extension messages and as virtual currency. In Kenya and Uganda, mobile phone services provide cheap messages about crop price information via text messaging. In Tanzania, there are ‘market spies’, farmers who visit local markets and remain in contact with the village using mobile phones to negotiate for better prices.

In spite of the growing use of mobile telephony and other ICTs, Africa has lagged behind in harnessing ICT potential for extension and other rural development issues in comparison to countries such as China, India, and Chile. Sub-Saharan Africa has the lowest teledensity in the world (Bertolini, 2006a). Many challenges exist to ICT use in SSA, and there are concerns that many rural African communities are being further left behind through the ‘digital divide’.

The purpose of a sub-surface drainage system is to lower the ground water table and removal of salts beyond the crop root zone. The ground water table may rise due to commonly practiced flood irrigation method, seepage from unlined channels, percolation of rain and runoff water and sub-surface flow from higher areas. Sub-surface drainage consists of drains laid at a specified depth, spacing and grade below the ground surface. The size, spacing and depth of drains depend largely on the soil-water properties viz. , infiltration, saturated hydraulic conductivity, drainable porosity; and the requirement of removal of water through drains in certain time period fixed on the basis of rainfall and crop cultivated. The drains are usually placed in a pervious stratum. Suitable filter of coarse sand and gravel may be used when it is placed in a low permeable stratum. Sub-surface drainage serves the important job of removal of concentrated salt solution from the crop root zone particularly in arid and semi-arid region.

The purpose of a sub-surface drainage system is to lower the ground water table and removal of salts beyond the crop root zone. The ground water beyond table may rise due to commonly practiced flood irrigation method, seepage from unlined channels, percolation of rain and runoff water and sub-surface flow from higher areas. Sub-surface drainage consists of drains laid at a specified depth, spacing and grade below the ground surface. The size, spacing and depth of drains depend largely on the soil-water properties viz., infiltration, saturated hydraulic conductivity, drainable porosity; and the requirement of removal of water through drains in certain time period fixed on the basis of rainfall and crop cultivated. The drains are usually placed in a pervious stratum. Suitable filter of coarse sand and gravel may be used when it is placed in a low permeable stratum. Sub-surface drainage serves the important job of removal of concentrated salt solution from the crop root zone particularly in arid and semiarid region.

Advantage of sub-surface drainage system

1. Since sub-surface drainage are underground, no loss of land for cultivation. Some part of the land goes out of use for making drains in surface drainage.

AVOCADO

Persea americana Mill.

F: Lauraceae

Avocado, also known as butter fruit gained importance over years as one of the most nutritive fruits. Demand for this fruit increased over the past few years and now it has become an important fruit in international trade.

Original home of Avocado is Mexico in Central America and grows wild all over South America. The Spanish explorers took this fruit to Spain during 1601. It was introduced to Jamaica in about 1650. Avocado was first reported in Mauritius in 1780, Florida in 1833, California in 1856 and Zanzibar in 1892, but its cultivation started extensively in these areas during 1900 (Purseglove, 1974). It was introduced to South and West Coasts of India about 100 years ago from Ceylon. Avocado is now growing in most of tropical and sub tropical countries.

Avocado is grown commercially in USA, Israel, South Africa and Australia. USA, Israel, and South Africa are main exporters. In India, it is mainly grown in South where it is centred on hill slopes of Tamil Nadu, Kerala, Coorg and in selected regions of Karnataka and Maharashtra.

If the concentration of cells in suspension cell culture has reached to 7X10⁵ cells/ml, it is to be subcultured. Suspension cells are diluted to concentration of approximately 1X10⁵ cells/ml although it varies from cell line to cell line. So, to subculture into a 3 litre glass flask using 500 ml of suspension of cells, there is a need of 5X10⁷ cells. As the concentration of cells is 7X10⁵ cells/ml, there is a need of 71.4 ml of cells. Adherent cells are put in the culture flasks at a concentration of 5X10⁴ cells in a 25 cm² flask. For example, after trypsinization, the cells have been resuspended in 5 ml of medium and cell concentration is 1X10⁵ cells/ml or total number is 5X10⁵ cells. If one wants to put cells into two 25 cm² flasks each containing 5X10⁴ cells in 5 ml volume, there is a need of 1X10⁵ cells, which can be obtained from one ml of cell suspension (1X10⁵ cells/ml).

GENERAL CHARACTERS

• The members are terrestrial, and saprophytic or parasitic.
• The mycelium is well developed, branched and septate. The mycelium is of primary, secondary and tertiary type.
• Dolipore septum is present except rusts and smuts.
• Clamp connections present.
• Cell wall consists of chitin and glucans.
• Basidiomycetes reproduce asexually by conidia, arthrospores, oidia, fragmentation or budding.
• No specialized sex organs develop in Basidiomycetes.
• Plasmogamy takes place by somatogamy or spermatization.
• Sexual spores are basidiospores.
• They are exogenously produced on basidium.
• Usually four basidiospores are develop on basidium.
  The Basidiomycotina includes rusts, smuts, mushrooms, jelly fungi, puffballs, shelf fungi, toadstools, bird’s nest fungi, bracket fungi and earth stars.

GENERAL CHARACTERS

• The majority of the members are saprobic. A few Zygomycetes are weak parasites, attacking plants and animals.
• Most Zygomycetes produce a well developed and branched mycelium, consisting of coenocytic hyphae.
• Cell wall is mainly composed of chitin.
• Motile cells or zoospores are absent.
• Asexual reproduction takes place by non motile sporangiospores called aplanospores.
• Sexual reproduction takes place by gametangial fusion.
• Gametangial fusion results in the production of a thick walled resting spore, called zygospore.

GENERAL CHARACTERS

• Deuteromycotina includes the fungi in which the ‘perfect stage’(zygote, ascus, basidium) is either lacking or has not been discovered so far. Because of the apparent absence of any perfect stage or sexual phase, these fungi are commonly called ‘imperfect fungi’ or technically ‘Fungi imperfecti’.
• The characteristic feature of Deuteromycotina is the absence of sexual reproduction. The members reproduce only be asexual methods, and that too also chiefly by conidia, which develop on conidiophores.
• The conidia are produced either directly on the conidiophores or in some special types of fruiting bodies such as synnemata, acervuli, sporodochia or pycnidia.
• Fungi possess branched, septate and multinucleate mycelium except the unicellular yeast like members of Blastomycetes.
• Sexual reproduction is completely absent.
• Parasexuality is shown by some Deuteromycotina. Under this phenomenon, the process of plasmogamy, karyogamy and haplodization take place, but not at specified time or specified points in the life cycle of the fungus.

GENERAL CHARACTERS

• Ascomycotina includes only such fungi in which the zygospores are absent and the perfect state spores are the ascospores.
• The Ascomycetes and Basidiomycetes are sometimes combindly called ‘higher fungi’.
• Cell wall is made up of chitin.
• Mycelium is well developed branched and septate.
• Asexual spores are non-motile conidia.
• Sexual spores are ascospores.
• Ascospores are usually 8 in an ascus.
• They are produced endogenously inside the ascus.
• The asci are usually grouped to form a definite type of multicellular fruiting body called ascocarp.
• The ascocarps are either cup or saucer shaped ( apothecium), flask shaped (perithecium), or closed, spherical and indehiscent (cleistothecium).
• The characteristic ascospores are present in sac- like body, called ascus and therefore these fungi are also commonly called ‘sac fungi’
• Yeast is single celled organism.

GENERAL CHARACTERS

• The Mastigomycotina includes all eumycota fungi which produce flagellated cells during their life cycle.
• Majority of them are with filamentous hyaline coenocytic mycelium.
• Cell wall contains cellulose.
• They show centric nuclear divison.
• The mode of nutrition is typically absorptive, because a majority of mastigomycotina contains some or other type of haustoria.
• They produce asexual spores called zoospores.
• Oospore is the sexual spores.
• Members of the class oomycetes are mostly aquatic but some are facultative or obligate parasites of vascular plants.

1.0. Objectives

• Identifying the subject and verb of a sentence
• Understand the rules of correct writing
• Illustration of the significance of the forms of verbs according to the subject in sentences
• The practice of choosing a verb that goes with the subject of a sentence