eBook Chapters

Introduction
Advertising is an integral component of modern commerce and communication. It has evolved from primitive oral traditions to sophisticated digital marketing strategies. This chapter explores the historical evolution of advertising, from ancient civilizations to the digital age, and provides a scholarly analysis supported by bibliographic references.
Early Forms of Advertising
The earliest forms of advertising date back to ancient civilizations. Merchants in Mesopotamia and Egypt used papyrus posters and inscriptions to announce products and services (Presbrey, 1929). Ancient Greek and Roman societies relied on town criers to deliver commercial messages, a practice that continued for centuries (Nevett, 1982). These early advertisements were primarily oral or visually static, relying on location-based methods.
Advertising in Ancient India
In India, advertising has a long history dating back to ancient times. Traders in the Indus Valley Civilization (circa 2600–1900 BCE) used symbols on seals to mark their goods (Rangaswamy, 2006). Town criers were common in ancient Indian markets, and artisans used painted walls and inscriptions to promote their products. Temples and religious institutions also played a role in spreading messages through inscriptions (Kumar, 2017).
The Middle Ages and the Printing Revolution
During the Middle Ages, advertising remained largely oral, with traders and peddlers using verbal promotion. However, the invention of the printing press by Johannes Gutenberg in the 15th century revolutionized advertising. The first printed advertisements appeared in the late 15th century, including handbills and posters that promoted books and medicines (Elliott, 1962). One of the earliest printed advertisements appeared in a 1477 English prayer book, promoting a sale by William Caxton, England’s first printer (Presbrey, 1929). The printing revolution facilitated mass communication,

Introduction Agricultural extension plays a pivotal role in the advancement of agriculture in any nation. It encompasses the dissemination of knowledge, guidance, and assistance to farmers, rural communities, and various stakeholders involved in the agricultural domain. The primary objective of agricultural extension is to empower farmers to enhance their productivity, income, and overall quality of life. The concept of agricultural extension has undergone significant transformations across various countries, including India. This article will delve into the historical progression of agricultural extension both internationally and within the Indian context.

Agricultural extension plays a critical role in bridging the gap between research and farmers by disseminating knowledge, improving skills and enabling farmers to adopt new practices that can boost productivity and sustainability. Over the years, the role of extension has evolved from a focus on productivity to a more holistic approach, which now includes market orientation, environmental sustainability and rural development. Evaluating the role of extension involves examining its contributions to rural livelihoods, food security and the broader agricultural ecosystem.
Impact on Productivity and Food Security: Extension services have traditionally aimed to increase agricultural productivity through technology dissemination and best practices, contributing significantly to food security in countries like India.
Market and Value Chain Linkages: Modern extension efforts emphasize connecting farmers to markets, enhancing income potential, and promoting value addition, especially through initiatives like FPOs and ICT-based tools.
Environmental Sustainability: With a rising focus on climate resilience, extension has expanded to educate farmers on sustainable practices, water conservation, soil health, and organic farming.
Empowerment and Community Development: Extension now goes beyond agriculture, aiming to empower rural communities by encouraging selfreliance, entrepreneurship, and participatory decision-making.
The evolution of agricultural extension in India reflects a dynamic journey shaped by various agricultural challenges, government policies, and the changing needs of rural communities. The main stages in the development of agricultural extension in India are as follows:
A. Pre-Independence Period (Before 1947)
Here’s a brief overview of each pre-independence rural development program along with their objectives and significance:

Introduction

Baking is not a new concept to us. Baking process dates thousand years back since the Paleolithic age. During those days, the baking was done by simply grinding the grains, mixed with water and baked on the hot rocks. The bread produced that time was not leavened but flat. Ancient Egyptians have the credit for development of baking between 2600-1200 BC. Roman Empire also had the popularity of the art of baking and bakeries were in existence in Europe too during Middle Age. Baking was considered a highly respected profession under the Roman Empire. The art of baking has travelled a long journey since then. The bakery and confectionary has undergone a gradual evolution with time. Great technical progress stared in the nineteenth century. Development of automatic machines reduced the task of the manual labour and because of this development the bakers could perform many more tasks with the machines. Today’s baking has a dependency on the machines. All the work is performed by the automated machines whereas the bakers only control the machine operations. The baking process has become easier, the efficiency has increased and the quality of the products has improved because of these high-tech machines. The preparation of bakery products using traditional methods has also improved over the time to minimize the energy and time consumption. Today’s consumer is very much concerned about his/her health and look for the healthy options in baked products. The trend has led to various innovative formulations for the baked products so that the health benefits may also be provided not only the calories. This chapter will discuss various advancements and trends in different types of bakery and confectionary products.

The Rochdale Society of Equitable Pioneers was founded in Rochdale, England, in 1844 and soon became a prototype for cooperatives worldwide. Its governance structure, known as the Rochdale Principles, is still a key guideline for the design of cooperatives. The social dislocations of the Industrial Revolution inspired workers and enlightened entrepreneurs to establish cooperative societies since the beginning of the nineteenth century.

Abstract

Camelids across the world are reared for milk, meat, draught, race and tourism. Camelids are also the source of world’s finest natural fibre. They are distributed in the South American, African, Arabian and Asian countries. Apart from this a feral population exists in Australia and recent reports indicate that a few animals of the species are also being reared in Europe. Camel (Camelus dromedarius) is the predominant species of the camelids. The world camel population shows an increasing trend with 12.92 m in 1961 to 26.63 m in 2011 producing 0.42 m tonnes of meat and 2.11 m tonnes of milk per annum. The top 20 camel rearing countries produce both milk and meat with the exception of India and Pakistan as per FAO data. There are about 83 populations of the dromedary camels in the world spread mainly across African and Asian countries. There are about 3.04 m Alpacas in world with Huacaya and Suri as the two main populations and 3.24 m Llamas with Chaku and Kara as the two main populations. The Guanaco population in the world is about 0.5 m and that of Vicuna is 0.35 m. The wild Bactrian camels are around a thousand but the domesticated Bactrian camels are about 0.6 m. The Alpaca and Bactrian camel genome has been sequenced whereas the expressed sequence tags of the Dromedary are available in the public domain. A brief account of evolution, present status and conservation of camelids is discussed.

Origin of Species

A biological species is a group of reproductively isolated individuals

Speciation usually occurs via a branching process called cladogenesis

Divergent evolution can be allopatric, parapatric, or sympatric

Müntzing was able to re-create an allotetraploid species

Evolution can proceed gradually or be punctuated by periods of rapid change

Introduction

Agriculture is vital to the Indian economy in terms of job creation, with nearly half of the Indian population relying on agriculture and related activities for a living. A large proportion of the population, particularly in rural areas, is illiterate. The rural population, which is illiterate and ignorant, is unable to cope with the complexities of agricultural technology management. As a result, vocational training and technology dissemination are few viable options for increasing production efficiency and achieving rapid and sustainable agricultural development. The State of Odisha derives more than a quarter of its revenue from agriculture. More than 40% of the people in the state of Odisha depend on farming as their primary source of income and way of life, making up more than 53% of the state’s workforce. whereas agricultural technology has developed into a logical extension of the traditions, conventions, knowledge, and skills that date back to the early days of human civilization and have continued to evolve over time. It was not just agriculture that produced food or other biological means; rather, it essentially presented a wide range of traditional values to make it abundantly evident that “TECHNOLOGY and TECHNIQUE” are the cultural means to satisfy the biological as well as social demand for life. To provide the necessary acceleration to the agricultural development, Agricultural Technology Management Agency (ATMA) Scheme was launched during 2005-06 in order to enrich farmer’s skills, knowledge and competency several developmental programmes/projects, in agriculture and allied sectors. In the state Odisha, a district level autonomous institute has taken the main responsibility of all technology dissemination activities at district level for development of farmers and farm women through its bottom –up approach. During 2010 the reforms made in ATMA project and farm persons were given due importance to its multifarious activities like training, demonstration, information support, input supply, market-oriented facilities, linking credit and exposure visit etc. These multi-purpose activities provide ample opportunities for the farm communities and makes the resources accessible for them. Additionally, ATMA served as a link between individuals in need and those with the means necessary for undergoing rapid technological change. It is also critical to evaluate various stakeholders of ATMA in order to enhance both its organisational and functional approach. This includes various parameters such as efficiency of skilled professionals of ATMA, availability of resources and feedback from farmer beneficiaries among other factors.

In case of Allahabad, it is evident that a major thrust catapulting the city to an invincible position was experienced immediately after 1857. These changes in the character of Allahabad along its journey which witnessed the resurgence of the pilgrim town into a front ranking educational and cultural node also saw the shades of capital center and finally its transition into a low profile city which today has lost its vitality and seem to be comparable to a non functioning muffossil town of Uttar Pradesh. The facts and figures representing the key events and a survey of the city enable us to establish a direct relationship between the functions and performance of the city.

The first part of the chapter is based on the inferences from the study on Allahabad covered earlier. The second part deals with testing these facts on ground by conducting interviews with eminent individuals who had been deeply associated with education and cultural status of Allahabad. The third part consists of the final inferences. Some critical conclusions are also borne out reflecting a clearer understanding of the phenomenon of decline of Allahabad.

11.1 Introduction

In the preceding chapter 10, we have discussed in detail, the test procedures for which it has been assumed that the sample size n is large, (i.e n >,30). Those tests are also known as approximate tests or z tests. But in case when sample size n is small i.e. n<30, the approximate test fails to deal with such problem and we apply the theory of exact sample, for small sample tests. The exact sample tests however can be applied to large samples also though the converse is not plausible. In all the exact sample tests, the basic assumption is that the parent population is normally distributed.

In this part we will discusse in details the exact sample tests (based on exact sampling distributions namely snedekor’s F, student’s t and chi square (c²) distributions. These distributions will be simply introduced in short because main emphasis has to be given only on the test procedures based on them.

11.1 Introduction
In the preceding chapter 10, we have discussed in detail, the test procedures for which it has been assumed that the sample size n is large, (i.e n >,30). Those tests are also known as approximate tests or z tests. But in case when sample size n is small i.e. n<30, the approximate test fails to deal with such problem and we apply the theory of exact sample, for small sample tests. The exact sample tests however can be applied to large samples also though the converse is not plausible. In all the exact sample tests, the basic assumption is that the parent population is normally distributed.
In this part we will discusse in details the exact sample tests (based on exact sampling distributions namely snedekor’s F, student’s t and chi square (χ2) distributions. These distributions will be simply introduced in short because main emphasis has to be given only on the test procedures based on them.

14.1 Section-A : Write True / False

Q.1 If sample size n is small ie n < 30, then the small sample test is applicable.

Q.2 The exact sample test (small sample test) can be applied to large sample test but the converse is not plaussible.

Q.3 If (x²1 , x²2 ) are two independent chi-square variates with (V1, V₂) degree of freedom then F statistic is def ned as

• General considerations

 • Blood glucose

• Total serum protein

 • Serum albumin

 • Serum globulin

 • Serum gamma globulin

 • Serum calcium

 • Serum inorganic phosphorus

 • Serum magnesium

 • Serum cholesterol

 • Serum creatinine

 • Serum urea

 • Serum chloride

 • Serum sodium

 • Serum potassium

 • Serum Glutamic Oxaloacetic Transaminase

 • Serum Glutamic Pyruvic Transaminase

 • Serum alkaline phosphatase

Collection of blood

Blood sample should be collected in a capped clean and dry vial containing an appropriate amount of anticoagulant. The commonly used anticoagulants are ethylene diamine tetra acetic acid (EDTA) @ 1-2 mg/ml and heparin @ 5 I.U./ml of blood.

Collection of blood Blood sample should be collected in a capped clean and dry vial containing an appropriate amount of anticoagulant. The commonly used anticoagulants are ethylene diamine tetra acetic acid (EDTA) @ 1-2 mg/ml and heparin @ 5 I.U./ ml of blood. Sites for blood collection Before collection of blood clean the site of collection by applying some antiseptic solution. If the area is hairy shaving of the site under aseptic condition should be done. Tip of the ear should be preferred for prompt or early diagnosis of haemoprotozoan infections. The vein can then be punctured with hypodermic needle and the collected blood is transferred to a clean glass vial. For collection of blood various preferred sites in different animals are as under

• General considerations

 • Collection of blood

 • Storage

 • Examination of blood

 • Coagulation time

 • Bleeding time

 • Determination of movement of parasites under wet film

• Total erythrocyte count

 • Total leucocyte count

 • Differential leucocyte count

 • Hemoglobin

 • Erythrocyte sedimentation rate

• Hematocrit value

 • Mean corpuscular volume

 • Mean corpuscular hemoglobin

 • Mean corpuscular hemoglobin concentration

 • Erythrocyte fragility test

• General considerations

 • Indications

 • Limitations

 • Techniques of bone marrow examination

 • Cell types

 • Cellular composition of bone marrow

 • Morphology of the cells

 • Interpretation of bone marrow examination

Objective
After performing this experiment you will be able to:
Perform the cut out test for the given sample of food product.
Principle

The cut-out test is conducted to evaluate the overall quality of canned food. This test involves examining the condition of the food contents, the external and internal state of the can, and other characteristics of the product through various organoleptic, physical, and chemical assessments.

Materials and Equipment

1. Canned food: 4?6 nos. Cans

2. Tone tester

3. Physical balance

4. Vacuum gauge

5. Can opener

6. Brix refractometer

7. Scale

8. pH paper near neutral ranges.

• General considerations

 • Indications

 • Collection of cerebrospinal fluid

 • Sub-occipital puncture

 • Lumbar puncture

 • Examination

 • Physical examination

 • Chemical examination

 • Cytological examination

 • Microbiological examination

Eyes Anatomy The eye has following important structures. •     Choroid is the layer containing blood vessels that lines the back of the eye and is located between the retina and the sclera. •     Ciliary body is the structure containing muscle and is located behind the iris (that assist in focusing the lens). •     Cornea is the clear outer layer at the front of the eye that transmits and focuses (i.e., sharpness or clarity) light into the eye. •     Fovea is the depression in the inner retinal surface, the photoreceptor layer of which is entirely cones specialized for maximum visual acuity (sharp vision). •     Iris is the colored part of the eye regulating the amount of light entering the eye. In bright light,

• General considerations

 • Collection of feces

 • Storage

 • Examination of feces

 • Gross examination

 • Microscopic examination

 • Examination of feces for flukes

 • Examination of feces for blood

 • Culture of feces for nematode larvae

 • Sporulation of coccidia.

• General considerations

 • Collection of milk sample

 • Storage

 • Examination of milk

 • Physical examination

 • Chemical examination

 • Cytological examination

 • Bacteriological examination

• General considerations

 • Volume

 • Colour

 • Reaction

 • Concentration of spermatozoa

 • Motility

 • Live and dead count

 • Microbiological examination

Deviation from normal well being may be for various kinds involving one or more organs and exhibiting array of symptoms. Examination of animals for diagnosis of disease is strenuous process because investigator has just got to know by several means of examination. The evidences produced by owner, animal house, feed being provided supported by prevailing environment and climate are immensely helpful in accurate diagnosis. Diagnosis, of production related diseases, is more difficult because of biasness in history revealed by the owner. At the same time diagnoses of poisonings are also not easy because owner’s description about possible cause and symptoms exhibited by sick animals are vague. So careful quizzing of owner about each and every aspect of disease and animal obviously seems to be first step towards diagnosis, followed by examination of animal. Examination of environment in relation to history revealed by owner and observations drawn from the examination of animal can infer some conclusion about cause of disease. Support of laboratory examinations such as fecal test, blood test and urinalysis are important tools in disease investigation. Following steps are essential in disease diagnosis.

The essential database for all skin diseases consists skin scrapings. Skin scrapings fall into two main categories: superficial and deep. Superficial scrapings give information from the epidermis’s surface without causing capillary bleeding. Capillary haemorrhage is a sign that the sampling was deep enough to gather material from the hair follicle. Deep skin scrapings are used for this purpose. The main purpose of skin scrapings is to detect the presence or absence of mites. A skin-scraping spatula, which is a thin metal weighing spatula, is recommended for use while scraping the skin. These spatulas are safe and can be used again. Scrapings from active lesions at several places are to be submitted. Scraping from active lesions at several places is to be submitted. Generally, the periphery of the lesion contains more parasites than the centre. Skin scrapings are used to identify ectoparasites and fungal diseases.

• General considerations

 • Examination of skin scrapings for mange

 • Examination of skin scrapings for fungi

 • Cultural examination

General Considerations

The skin scrapings are examined for the diagnosis of skin diseases, including parasitic, fungal and bacterial infections and infestations.

• General considerations

 • Collection of synovial fluid

• Examination of synoival fluid

 • Physical examination

 • Chemical examination

 • Cytological examination

 • Microbiological examination

 • Examination for immune complexes

 • Miscellaneous examination

 • Inflammatory conditions of joints

 • Non-infectious arthritis

 • Infectious arthritis

 • Immune complex mediated arthritis

• General considerations

 • Collection

 • Preservation

 • Examination

 • Physical examination

 • Chemical examination

 • Microscopic examination

 • Organized sediment

 • Unorganized sediment

 • Cultural examination

A veterolegal post mortem examination should be done by written order from the Police or the District Magistrate.

Before examination carefully read the police report.

Ideas, materials, facilities, processes and labourare clubbed together to produce a worthwhile product-milksuccessfully and this may be the art and science of management. In otherwords, weput togethertheinputs-soil, labour, hay, fertility, silage into milk and such transformations are the result of a purposeful and pre-meditated action-management and not just by happenstance.

Decisionmaking role of dairy farm manager Manager of dairy farm decides :

• What to do !

• How to do !

• When to do !

For answeringtheabove, themanager mustplan to co-ordinate, organize, control and direct his supportive staff. For accomplishing his targets, the manager must gatherinformation about allresources available, applicationof newtechnologies, different options of market outlets and sources of capital credit needed. He should be able to establish targets to be achieved. Obstacles or ‘stumbling blocks’ are always there which hinder progress towards goals. Therefore, these have tobe identified.He shouldbe abletocomparealternative optionsof realizing targets, consideringtheeach one in terms of income potential, thecapital needed, the labour required. Then choosing the best plan of action and put that option into operation. The manager should be able to assume responsibility for the consequences of actions taken. Later, he should evaluate and measure results. His accomplishments maybe assessed in the light of standards of performance. Notonlythat, but alsoto keep a vigil on production level, labour efficiency, cost, investments etc. He must keep the operating system flexible so that he may take advantage of new developments to be applicable in his plans.

Introduction

Fish play an important role in meeting current and future food needs within the global food system. Fish farming holds tremendous promise in responding to the surging demand for food, which is taking place due to increasing population. Fish now accounts for almost 17 percent of the global population's intake of protein, and in some coastal and island countries, it can top 70 percent. Aquaculture has been identified as an important solution to address the challenges to global food security arising from climate change and the projected world population of 9.5 billion by 2050. However, the challenges facing this sector, including overfishing, habitat degradation, and climate change, necessitate international cooperation and coordination.

12.1 Assays for molecular diagnosis of Acute Myeloid Leukaemia (AML)

Acute Myeloid Leukaemia (AML), also known as Acute Myelogenous Leukaemia or Acute Myeloblastic Leukaemia or Acute Granulocytic Leukaemia or Acute non Lymphocytic Leukaemia is an aggressive type of cancer which affects blood and bone marrow. AML is a heterogeneous disorder if one considers its clinical status, therapeutic responses and overall prognosis.¹ This disease called acute because it progresses very fast and myeloid as it originates from myeloid cell line in the bone marrow.

In bone marrow blood cells are made in a controlled way. When AML occurs excess numbers of immature leukaemia cells are produced. Overproduction of leukaemia cells in bone marrow disables bone marrow to make mature white blood cells. These accumulated immature cells are unable to function properly (Inability to fight infection).

Diagnosis: Correct diagnosis is important for a successive treatment for AML. There are several tests available to diagnose AML but not all tests will be used for each person. The following tests may be used to diagnose AML.

In business people regularly have to deal with situations where they have to make some decisions after analyzing some data. In such cases they often build a spreadsheet model of their problems. Financial Modelling using spreadsheets like MS Excel are used in many fields like financial analysis, risk analysis, valuations, investment management, credit analysis, scenario analysis, budgeting, sales forecast, financial projections, project evaluation, etc. Along with the use of Excel as a tool for modelling, skills in recording and using Macros in Excel is also required. Excel modeling remains one of the most widely used approaches in financial modeling and data analytics, offering a flexible and intuitive platform for analyzing financial data, building forecasts, and supporting decision-making. Its popularity stems from its accessibility, powerful built-in functions, and ability to create structured models without requiring advanced programming

Financial modeling is one of the most highly valued, but thinly understood, skills in financial analysis. The objective of financial modeling is to combine accounting, finance, and business metrics to create a forecast of a company’s future results. A financial model is simply a spreadsheet, usually built in Microsoft Excel, that forecasts a business’s financial performance into the future. The forecast is typically based on the company’s historical performance and assumptions about the future and requires preparing an income statement, balance sheet, cash flow statement, and supporting schedules (known as a three-statement model, one of many types of approaches to financial statement modeling). Financial modeling skills are essential for anyone pursuing a career in finance. Models synthesize a vast amount of information to help users make better investment and business decisions. The modeler’s technical acumen

Exchanges sodium (Na+) is animportantparameter forsalt affected soils. This is estimated by extraction with ammonium acetate and then measuring the extract inflamephotometer.

Reagents

1. Neutral normal ammonium acetate solution (1 N CH₃COONH₄ of pH 7): Dissolve 77.09 g of ammonium acetate in distilled water and make up the volume to one litre. Adjust the pH of the solution to 7 with ammonia solution or acetic acid.
2. Standard solution of Na (500 mg/L Na): Dissolve 1.271 g of NaCl in distilled water and make up the volume to one litre.
3. Working standard solution of Na (100 mg/L): Dilute 200 ml of 500 mg/L stock solution to 1000 ml.

Management of crop diseases by various methods of exclusion in order to reduce the pathogen population in a geographical location / country may be achieved by either preventing introduction of pathogens or by growing disease-free seeds and planting materials. In addition, the inoculum of a pathogen reaching newly planted crops may be significantly reduced by adopting appropriate cultural practices also. The contributions of these factors for successful cultivation of crops are discussed hereunder.

8.1 Prevention of Introduction of Microbial Pathogens

Prevention of pathogen introduction is the primary responsibility of plant quarantines. Quarantines have been established by several countries by enacting appropriate laws that regulate the importation of plants, seeds and asexually propagated plant materials. These materials are placed in post-entry quarantines (PEQs) and examined by technical personnel for the presence of pathogens and pests. It is obligatory for the exporting countries to comply with the regulations of the importing countries. As the movement of plant products has increased enormously, following the adoption of the General Agreement on Tariffs and Trade (GATT), vigilant enforcement of sanitary and phytosanitary measures has become essential. The Food and Agriculture Organization (FAO) appointed an Expert Consultation on the Harmonization of Plant Quarantine Principles to formulate basic principles to determine standards for plant quarantine principles in relation to international trade (FAO 1991). According to the recommendations of the Expert Consultation, the sovereignty of the importing country is recognized and it has the right to implement the phytosanitary regulations deemed fit by that country. However, cooperation among countries was emphasized for the successful implementation of the recommendations by the member countries belonging to one of the eight regional plant protection organization set up after the International Plant Protection Convention (IPPC) held in 1951. A plant pathogen is recognized as of quarantine significance (QS), if its exclusion is considered to be essential to protect agriculture and natural vegetation of the importing country which has to be provide necessary infrastructure and trained personnel to prevent or delay its entry along possible routes. Lists of quarantine pathogens and the regulations to be followed are prepared by the importing country and made available to the exporting countries.

Excretion is the process of elimination of metabolic wastes that include toxic nitrogenous end products of the protein metabolism and the gas such as carbon dioxide (CO₂). These nitrogenous wastes are excreted through urine. Fecal matter is not included in the excretory products as it is simply the undigested food materials, and are not metabolic end products. The membranes of aquatic animals, that is permeable to gases, pass water and solutes between environment and body. Most aquatic animals maintain in their bodies a reasonably constant proportion of water and solutes. When it is different from the surrounding water, it requires some mechanism for regulation, which is known as osmoregulation. Most invertebrates in the sea have nearly the same salt concentration (isosmotic or isotonic) as the environment. Sharks and rays (elasmobranches) tend to have a slightly higher concentration of salts and urea (excretory end products) than seawater but the body fluids of most teleosts (bony fishes) have much lower salt concentration than seawater. Freshwater fishes, which live in a medium of lower salt concentration (hyposmotic or hypotonic), have the threat of hydration, so they have special mechanisms to get rid of excess body water. Marine fishes that live in an environment of high salt concentration (hyperosmotic or hypertonic) have the regulatory mechanisms by which excessive loss of water from the body is prevented and body osmolarity (proper osmotic concentration) is maintained by retaining less toxic nitrogenous excretory products. Marine fishes, which lose water osmotically across the gills and must get rid of salt, tend to drink large volume of seawater and produce very small quantities of urine (Fig-6.1).

23.1 Introduction

Excretion is the elimination of nitrogenous metabolic wastes from the gut and skin of the body. Through excretion, certain substances are removed while others are conserved. Fish are either ammonotelic or ureotelic animals. Kidneys play the most important role in excretion to maintain water-salt balance.

Fish gill ammonia excretion has been investigated for 80 years, but its mechanisms are still up for debate. A new paradigm has been established by the relatively recent identification of the ammonia-transporting role of the Rhesus (Rh) proteins, a family related to the Mep/Amt family of methyl ammonia and ammonia transporters in many living organisms. These proteins also occur as glycosylated proteins in fish gills (Wright and Wood, 2009).

Excretory system of an organism maintains its homeostasis i.e., a constant internal environment. Here in insects, the blood is haemolymph therefore it determines the excretion of an insect’s body. Excretion also eliminates the nitrogenous wastes and maintains the salt- water balance and also regulates the uniformily of haemolymph. The characteristic feature of insects is the presence of malpighian tubules to eliminate the metabolic wastes, whereas rectum walls carry out the function of reabsorption of salt and water. A minimum amount of water is excreted with nitrogen waste in order to conserve the water in body.

Asia and the Pacific collectively feed over 4.5 billion people and account for one?third of global agricultural trade. Yet the region’s agri?food supply chains face mounting pressure from climate change, geopolitical disruptions, infrastructure gaps, and volatile markets. This report analyzes fifteen focus countries to distill common challenges, showcase good practices, and highlight investment and policy opportunities that can transform regional agri?food systems into resilient, inclusive, and sustainable engines of growth.

In today's sedentary lifestyle, ensuring adequate exercise for pet dogs is crucial for their physical health, mental well-being and preventing obesity. To help pet owners understand the importance of exercise in maintaining the overall health and happiness their canine companions and how much exercise is adequate to different pet breeds are incorporated in this text.

Physical Health Benefits

Regular physical activity is essential for controlling weight and preventing obesity, which are common concerns among dogs. Obesity in dogs is associated with various health issues such as diabetes, heart disease, and arthritis. Engaging in activities like walking, running, and playing not only burns calories but also improves cardiovascular health, strengthens muscles, and enhances flexibility.

This practical assignment deals with cost benefit analysis, and gives a clear picture of concepts of cost benefit analysis in determining the worth of an enterprise.

PURPOSE

 To make the students familiar with the concept of cost benefit analysis in determining the worth of an enterprise.

 To impart the knowledge and skill required to compute the cost benefit analysis process effectively for assessing the economic viability of an enterprise.

This practical assignment is associated with the evaluation of communication fidelity with in a communication process where in all the communication elements are responsible to contribute the same.

PURPOSE

To understand the communication gap which arises due to emergence of noise in the channel

To understand the importance of communicator’s ability to organize and treat the message for making communication effective

To understand the distortion (addition or deletion or alterations in the original message) in communication.

This practical assignment is conceptualized and designed to guide students in identifying and preparation of project proposals. This assignment provides an opportunity for the students to explore, thing and putting their ideas on paper.

PURPOSE

 To provide an idea about project in entrepreneurship development.

 To identify the project and its importance.

 To know about the preparation of project.

‘Extension’ acts as a potential link between ‘research’ and ‘teaching’ which also facilitates transfer of technology. In this context new concepts, like Rapid Rural Appraisal (RRA) and Participatory Rural Appraisal (PRA) are becoming more meaningful now-a-days.

Rapid Rural Appraisal (RRA)
i) RRA can be defined as a systematic but semi-structured study, carried out in the field by a multi-disciplinary team over a short period ranging from three days to three weeks, based on information collected in advance from published and/or unpublished sources, direct observations and interviews as to generate working hypotheses for subsequent action
ii) RRA study aims at generating information on rural life and conditions that is relevant, timely, accurate and usable in

Horticultural sector, which is contributing significantly for food and nutrition security, employment opportunity and poverty alleviation, got a real boost only in the early 1990s which coincided with liberalization of Indian economy. National area and production of horticultural crops are showing increasing trend over the years and production of horticultural crops has outpaced the production of food grain since 2012-13(Press Information Bureau, Govt. of India, Ministry of Finance, 2016). According to Economic Survey 2015-16, the share of horticultural output in agriculture is more than 33% over last decade and the sector contributes 30.4% to GDP of Agricultural sector. Horticulture sector accounts for 37% of total export of agricultural commodities at present and the exports have recorded sustained rising trend (Jha et al., 2019). The export status of APEDA (Agricultural and Processed Food Products Export Development Authority) products in the recent years shows 28.18% growth in value of horticultural products over the previous year. The investment in horticultural sector with focused attention has resulted in spectacular change in the horticultural scenario and production and productivity of horticultural crops.