eChapters

10.1. Origin and distribution

• Native of Philippines

• Grows wild in Malaysia, Indonesia and Singapore.

• Natural habitat extends across Paruguay, Penang, East and West Indies, sub-tropical Himalayas and Deccan peninsula.

• Introduced into India by Tata Oil Mills

• Cultivated in Bangalore and coastal areas of South India, Bengal, Odisha and Assam.

10.2. Economic importance

• Oil of patchouli is called patchoulol. Oil contains benzaldehyde, eugenol and cinnamic aldehyde etc.

11.1. Origin and distribution

• Indigenous to Mediterranean region, growing wild in higher hills of Southern France, Italy and Bulgaria.

11.2. Economic importance

• True lavender (Lavendula angustifolia Mill sub. sp augustifolia)

• Spike lavender (Lavendula latifolia Mill sub. sp spica)

• True lavender - used in perfumery industry.

• Lavandin - hybrid between true and spike lavender

• Lavender oil - delightfully clean, refreshing and sweet odour.

• Main constituent - ester, linalyl acetate 30 to 60%

• Another compound - ethyl-n-amyl ketone.

• Free linalool - major component

• Different steps involved in post-harvest processing of horticultural produces are depicted in Fig. 1.

Fig. 1. Flow chart on post-harvest processing of horticultural produces.

6.1. Pre sorting

• Done to eliminate injured, decayed and unwanted produce before cooling and handling.

6.2. Pre cooling

• Removal of field heat after harvest at 32°C for 1 h.

6.2.1. Advantages

• Reduces rate of respiration and ripening, moisture, bruise damage during transits, production of ethylene and growth of spoilage organisms

• Eases load on cooling system (Refrigeration) of transport or storage chamber

• Cashew kernel contains 47% fat, 21% protein and 22% carbohydrates.
• Cashew kernel does not have cholesterol.
• Collection of fallen nuts is known as Gllining.
• India is the largest producer as well exporter of raw cashew nut.
• The USA is the largest importer of cashew nut kernels in the world.
• Cashew is restricted to altitude below 700 m where the temperature does not fall below 20°C for prolong period.
• pH more than 8.0 is not suitable for its commercial cultivation.
• Pruning period: August-September
• Steam method is the most popular method of roasting.
• Best quality whole kernels kernels are obtained from drum roasting.
• Maximum recovery of oil is done using oil bath roasting.
• Inflorescence: Polygamomonocious
• Cashew nut is the III most important agriculture commodity exported from India.
• Broma dryer is a commonly used drier for drying of the kernel.
• The moisture content of the dried kernelranges between 2% to 4%.

• Deciduous, Monoecious fruit crop.
• Rich in Vitamin A (2710/U/100g)
• Fruits are highly astringent due to tannin content.
• Flowers appear in spring on new growth in February- March.
• Type of flowers: Male, Female, Bisexual.
• Pollination - Cross-pollination
• Mode of pollination - Insects
• Persimmon fruits exhibit a double sigmoid growth area.
• Date-plum (Diospyros lotus) used Rootstock in India
• American - Diospyros virginiana
• Japanese or oriental Persimmon - Diospyros kaki.
• Fruiting time – August- September
• Inarching on its rootstock on D. lotus.
• Dwarf and Semi-dwarf, modified central leader system.

• Monoecious, temperate nut fruit.
• Most valuable exchange earning nut crop.
• The USA is the leading producer of walnut
• Female are born terminally and male flowers laterally
• Paradoxes is a rootstock derived from Juglans hindsii × Juglans nigra.
• Reduction of walnut hull dehiscence Ethephon @ 2000 ppm.
• The blank nut is due to hot summers with low humidity.
• Trees deciduous 10-40 meter tall
• The temperature of 29-32°C near harvesting results in the wall filled kernels
• Sensitive to low temperature during spring and high temperature during summer.
• The chilling requirement is about 200-800hrs.
• Modified central leader system is ideal for training.
• Walnuts have high antioxidant content (Vitamin and fiber).

• Poona fig is the most popular cultivar grown in India (5.0 m × 5.0 m)
• Excel and Candia are suitable for HDP (2.5 m × 2.5 m)
• Candia is suitable for drying purpose.
• Excel is suitable for canning purpose.
• Deanna is suitable for table purpose.
• Fig is one of the first fruit to be preserved by drying.
• Salt and drought-resistant crop.
• Ficus carica is gynodioecious spp.
• Caprifig is monoecious spp.
• Common fig is pistillate.
• Excessive irrigation or heavy rains during ripening result in fruit cracking and producing of insipid fruits.
• Cultivar – Merselies, Black Ischia, Kabul, Banglara, Lucknow, (Dinkar – an improvement over Daulatabad).

• Banarsi, Chakaiya, Francis (susceptible to fruit necrosis) NA-4 (Krishna), NA-6 (NA-5 Kanchan), NA-9 (Neelum), N-7 (Amrit) free necrosis.
• Anola can be grown in the light as well as heavy soils except for very sandy one. However, well-drained fertile loamy soil is the best for its growth.
• Though Aonla is a subtropical fruit, it can be cultivated in a tropical climate quite successfully.
• Descending order of area wise production: Azamgarh < Pratapgarh < Varanasi < Bareilly
• Commercially propagated by Patch/T Budding
• Planting time is during July with a distance of 8m × 8m.
• The plant should be trained to a modified Leader system.
• By NDU in UP is the application of 10kg FYM, 125gN 50g P2O5 and 50g K2O per one-year-old plant.
• Age of 8 years (1000gN, 400g P2O5 and 400g2K2/O tree)
• Use of fertilizer is required during April-May and September-October.
• Flower bud differentiation in the 1st week of March.
• Sir ration (male to female) (1:307-1:197)

25.1 Introduction

All fishes have a similar nervous system organisation. Meninx primitive is a single protective covering that covers the brain and spinal cord. The brain varies in size about the body in different species and does not occupy the entire cranial cavity (Fig. 25.1).

25.2 The Brain

Except for elasmobranchs, which have larger brains, the relative ratio of the brain has been observed to be fairly constant in all fishes. The brain-body weight ratio, also known as the cerebro-somatic index (CSI), is calculated as follows. 

Fungicides are only allowed after years of intensive testing for effectiveness against a variety of plant plant. When a disease is stated on the label of a fungicide, it can be presumed that the active ingredient inhibits pathogen growth and limits the occurrence and spread of disease within acceptable levels of control. Fungicides do not always perform as predicted in practice. Not because the active ingredient is useless, but because of other factors that influence its performance. Consider everything from light and temperature to humidity and pH, and remember that all of these variables affect the active ingredients. Find information on these and other topics that can help you succeed in disease control below.

1. Identification: The most crucial first step towards successful disease control is correctly recognising the condition. Failure to diagnose disease can lead to misplaced or inappropriately scheduled controls.

Strobilurins are a group of compounds used as fungicides in agriculture. They belong to the larger group of QoI inhibitors that inhibit the respiratory chain at the complex III level.Common strobilurins include azoxystrobin, cresoxime methyl, picoxystrobin, fluoxastrobin, oryzastrobin, dimoxystrobin, pyraclostrobin, and trifloxystrobin.Strobilurin represents an important development of fungal-based fungicides and is derived from the fungus Strobilurus tenacellus.They have an inhibitory effect on other fungi and reduce nutrient competition.They inhibit mitochondrial electron transport, disrupt energy metabolism, and prevent target fungal growth. Strobilurin is the wonder fungicide ever developed with a new MOA and mobility that qualify it as a unique new generation of fungicides controlling different classes of pathogens.

Common Maintenance

 • Clean the exterior surface with a brush or cotton waste and plenty of water or kerosene oil.

 • Lubricate or lubricate the moving or rubbing surfaces of parts as needed.

 • Filter the chemical solution/fuel oil mixture as it is poured into the tanks. Make the caps or lids leak-proof by using gaskets.

 • Flush the equipment with clean water to clean the insides of containers, tubes, and nozzles.

Care and Maintenance of Hand Sprayer & Duster

• Dusters should be made of dry and sieved dust.

 • Grease the duster gear box once a month.

 • Clean the duster after use by removing all dust from the hopper.

 • Oil the sprayer’s cup and bucket washers on a regular basis.

 • After completing the day’s work, cleanse the spray tank discharge lines and nozzles with clean water.

Introduction

The agrochemical sector has been critical in enhancing agricultural productivity and output. Let’s look at the challenges that the agrochemical sector is facing and how they might be solved to ensure a brighter future.

Opportunities

1. Increase in irrigated area: Every year, around 0.5 million hectares of irrigated land are added as a result of the government’s ongoing efforts to make water available for irrigation. This is anticipated to boost production and increase farmer income. As a result, agrochemical consumption is expected to rise.

2. Changing food and consumption trends: Changes in consumption patterns and demand for a wide range of fruits and vegetables may drive farmers to employ more modern agricultural practises in order to fetch a premium for such produce. This segment is predicted to result in a 2% to 3% increase in agrochemical consumption.

Roughly one-third of the food produced globally is lost or wasted. The India Agricultural Research Data Book from 2004 states that 30% of fruits and vegetables are wasted. Based on an estimated 150 million tonnes of fruit and vegetable output in India, 50 million tonnes of trash are produced annually.

The quality of fruits and vegetables starts to decline as soon as they are removed from their natural source of nutrients. Artificial ripening chemicals are used to speed up the harvesting process, but they also degrade the product and have long-term negative health impacts. Mangoes, for instance, mature rapidly once calcium carbonate is injected into them. Chemicals such as copper sulphate, rhodamine oxide, malachite green, and lethal carbide are frequently utilised to highlight the colour and freshness of vegetables.

Role-play is a product of ‘play’, ‘games’ and ‘simulation’ (Gabrielle McSharry, 2000). In science education, role-play may be seen as an interaction between these three components – either in combination or by themselves – and students who perform such activities results in learning outcome. In the context of social studies, role-play is used to learn the issues and decisions of the past and how things might have been different in local community in a broader setting. Aside from knowledge acquisition, preparing and conducting a role-play activity strengthens students’ knowledge, acquisition skills, their creativity, their values clarification skills and a variety of interpersonal skills identified in the curriculum outcomes. As an effective instructional teaching strategy, role-playing emphasizes the social nature of learning and sees cooperative behaviour as stimulating students both socially and intellectually.

Q fever: Q fever is caused by a rickettsia like Organism (RLO), a parasitic organism falling between bacteria and viruses. It is a disease that is characterized by high fever, chills, muscular pains, headache, and sometimes pneumonia, that is caused by a rickettsia (Coxiella burnetii) of which domestic animals serve as reservoirs, and that is transmitted to humans especially by inhalation of infective airborne bacteria as in contaminated dust.

Q value: It is the quantity of energy released in a nuclear reaction expressed in million electron volts (MeV).

Q10 value: The number of times a reaction rate change with a 10oC change in temperature is called Q10 value. If reaction rate doubles with 10oC change in temperature, Q10 = 2. It is also called temperature quotient.

Q-enzyme: It is a branching enzyme responsible for formation of 1-6 bonds in amylopectin.

QHV process: It stands for Quality Has Value Process.

Objective

After performing this experiment, you will be able to learn

Sampling methods and procedures of packaging material.

Introduction

The objective of sampling of a packaging material is to obtain a representative sample of a whole lot for the required testing and/or grading. It is expected that the test results and grading will reflect the average quality of the PM from which the sample was taken.

Principle

The sample techniques and processes outlined in this publication are grounded upon scientific principles. Since the validity of any later test result depends on the quality of the sampling and the information given with the sample, the sampler is essential to the process of selecting lots for testing and/or grading.

Every PM in the population being sampled has an equal chance of being selected, according to the random sampling principle. Usually, the sample size that is tested is very small in relation to the size of the lot that it represents. The sample must be taken carefully and in a way that gives assurance that it is genuinely representative of the lot. Similarly, in order to reduce the composite sample, all necessary.

1. 21723 living species of fishes existing in the world at present.

2. Jhingran and Gopalakrishnan 1974 listed 314 species of teleost utilized for aquaculture throughout the world.

3. Gynogenetic offsprings are always females.

4. Bisexual fishes – Gonochorism fishes.

5. Protoandrous hermaphrodites – Lates calcarifer, Sparus auratus, Sargus sargus and Palleus mormyrus.

6. Protogynous hermaphrodites – groupers.

7. Dwarf males were observed in Angler fish and Salmonids.

8. Sand spawners / Psammophils – Gobio gobio.

9. Rock and gravel spawners – Rohu, salmonids.

10. Terrestrial spawners / aerophils – Bryconpetrosus.

1. P. monodon (green tiger prawn) is the most candidate species for cul ture.

2. Testis have 6 lobe all lobes are connected on the inner margin leading to vasdeferens.

3. Spermatozoa are stored in the terminal of ampulae.

4. Inhibitory hormone are secreted in the early maturity stage.

5. Matured ovary has dark color due to the accumulation of the carotenoid pigment.

6. The first abdomen segment assumed that have diamond shape called as saddle.

7. Male have petasma on the first pair of pleopod.

8. Female have thelycum on the 4 & 5th pair of walking leg.

9. Male has Gonophore on the fifth pair of the walking leg.

10. Female has Gonophore on the third pair of walking leg.

1. F. produce inky taste.

2. Phenol produce bitter taste.

3. Anaebena produce strong grassy odour.

4. A protozoan dinobryon imparts fishy odour to the water.

5. Phosphorus compound produce wormy smell.

6. H,S produce rotten egg or putrid smell.

7. Humus produce earthy odour.

8. Sewage contain 99% of water & 1% solids.

9. Sewage contain 70% organic & 30% of inorganic in nature.

10. In sewage organic fraction contain 60% of protiens & 20% of carbo-hydrate &10% fat.

1. Food is an essential part in everyday life.

2. The major biomolecules of the food which perform these functions called nutrients.

3. The study of various nutrients in relation to their effect upon the human body is called as nutrition.

4. Major nutrients: Carbohydrates, Lipids, Proteins, Minerals, Vitamins and water.

5. Insufficient food intake of necessary minimum amount of any nutrient leads tot state of malnutrition.

6. No food intake leads to starvation.

7. Water is not always included as nutrients, but it is essential that the diet provides sufficient water required for many functions of the body.

8. Lipids provide calories and essential fatty acids,

9. Lipids 98% of triglycerides + 2% phospholipids.

10. Lipids carry fat soluble vitamins.

1. Bacteria intoxication - already formed bacteria not live bacteria

2. Bacterial infection consumption of live bacteria

3. Neuro toxin produced by C. botulinum

4. Listeria identified by the serotyping

5. Fishery product have type E, C. botulinum

6. S. aureus produced entiro toxin

7. S. aureus is heat resistant but not active in pasteurization

8. E. coli-0157:H7

9. Salmonella should be below 105/g

10. Septicemia can occur due to the salmonella

11. L. monocytogens should be 10/ g

1. Farm is complex structure comprising living and non-living things.

2. The engineering components and structures aqua farm. basic necessities of an

3. Ponds, Water transportation systems - primary structures of an aqua farm.

4. Machineries, builtin structures and other peripheral accessories secondary structuresof an aqua farm.

5. Secondary structures may vary from one pond to another pond based on the

a. Type of culture

b. Method followed

c. Economic status of the farmer.

6. Site selection - Pre-requisites of a successful aquaculture farm.

7. Soil bottom must be impervious to prevent excessive seepage.

8. Fine textured soils - a high clay content.

9. Embankment ponds are also called as Hill/ Water shed ponds.

10. Excavated ponds are principally used for the commercial fish and shrimp production.

1. The process of removing heat from a substances under controlled condition known as refrigeration.

2. A refrigerator is a revised heat engine.

3. Whenever a force acts on body and the body undergoes a displacement is known as work.

4. The rate of doing work-power.

5. Unit of work kgf, Nm, joule.

6. 1 HP-736 watts.

7. Energy defined as the capacity to do work.

8. 1 bar- 105N / (m ^ 2)

9. Absolute pressure gauge pressure + atmosphere pressure.

10. The degree of hotness or coolness is known as temperature.

11. The level of intensity of the body - heat.

1. The process of directing or conducting the movement of vessel one place to another place is known as navigation.

2. Controlling the ship is known as seamanship.

3. VHF used up to 25 nautical miles.

4. Speed of sound wave 322m/sec.

5. Speed of radio wave 3x10 m/sec.

6. Navigation derived from latin word.

7. Earliest form of navigation is piloting.

8. Dead reckoning is rough method only.

9. Radio navigation also known as electronic piloting.

10. World chart produced by Gerardus Mercator.

1. Examples of grappling gears Clamps, Tongs and Raking devices.

2. Wounding gears with sharp projectiles Spears, Lances, Fish plummets, Fish comb, Arrows, Harpoons, Blow guns, Rifles.

3. Brail net-Large scoop net.

4. Jerk net a rectangular net kept under tension between two sticks which are pushed forward.

5. Collection of shells and corals for decoration and small fishes for aquarium is called as Aesthetic fishing.

6. Fish plummets are also called as plume lines or plumed lines.

7. The cross section of the two scam trawl during operation is elliptical.

8. Bridles-legs of trawl.

9. Sweep lines serve as false netting under water and vibrate in the water column.

10. The size of the trawl net is generally referred by the length of the head rope.

1. Chromatography Technique for the separation of one or more biological compounds from the mixture.

2. Chromatography - Mikhail Tswett (1906)

3. Distribution or partial coefficient is defined as the ratio of concentration of compounds in the mobile phase to that the concentration of compounds in the stationary phase.

4. Chromatography also used for the separation of the colorless compounds from a mixture.

5. Spectroscopy employs the interaction of light with matter.

6. Light is electromagnetic radiation (EMR) that exhibit discrete packets of energy is called as photons.

7. Jablonski diagram gives the electronic and vibrational state of the molecule.

8. Molecular structures responsible for the interaction with EMR are called as Chromophores.

9. Beer's law is valid for low concentrations only.

10. Prism splits incoming light into its components by refraction.

11. Grating splits the wavelengths by diffraction.

1. I Kilo joule - 10 joule.

2. 1 Mega joule -10º joule.

3. 1 Kilowatt hour-3.6*10 joule.

4. The heat engine converts heat energy into mechanical energy.

5. The machine which converts one forms of energy to another form is called as engine or prime mover.

6. Fahrenheit scale is called as British thermal unit and denoted by B.Th.U.

7. Internal combustion engines using coal gas as fuel was made by Frenchman Etienne Lenoir (1860).

8. Silent gas engine was developed by Germans Nileolansotto & Eugen Langen.

9. Rudolph diesel made the first diesel engine in 1894.

10. TDC is also called as inner dead centre.

1. Luther Gullick denoted the functional elements of the administration POSDCORB.

2. CIFNET Central Institute of Fisheries Nautical Engineering and Training. It was started in 1963. The head quarters situated in cochin.

3. CIFNET have two units one Chennai, another one Visag.

4. IFP-integrated fishery project was started in 1952.

5. During 2008 the FPT was renamed as NIFPHTT. It has situated in cochin.

6. FSI-fishery survey of India. It has head quarter in Mumbai.

7. CICEF-Central Institute of Coastal Engineering for Fishery. It is situated in Bangalore.

8. CICEF was renamed in 1983 as PISFH-pre investment of fishing harbor

9. NFDB-national fisheries development board.established in 2006. It has head quarters in Hyderabad.

10. CAA-coastal aquaculture authority established in 2005. It has head quarter in Chennai.

11. Coastal zone regulation notification - 1991.

Cacti are eulogized as ‘Plants of 21st century’. They have gained popularity due to many exciting shapes, blooms, ease of culture and long life without least care. Cacti are categorized as fleshy stem succulent with photo-synthetically active stem. Good for indoor decoration in pot, outdoor decoration, landscaping, public garden, rock garden, etc.
The family Cactaceae includes approximately 131 genera and 1,750 species. But different authors mention the number of genera differently between 30 to 200. Members are distributed chiefly in semi-desert or drier regions of tropical and sub-tropical America, and also in Africa, Mauritius, Seychelles, India, Sri Lanka and Australia. Mainly the Cactaceae are the succulents of New World. Main species of Old World is Rhipsalis. Some of the larger genera along with their number of reported species are Mammillaria (200-300), Opuntia (250), Echinocereus (75), Rhipsalis (60), Cereus (50), Cephalcereus (48), Echinopsis (35), Epiphyllum (21) and Pereskia (20).
The classification of the family Cactaceae remains uncertain as of August 2023. Since the mid-1990s, the system produced by the International Cactaceae Systematics Group (ICSG) of the International Organization for Succulent Plant Study has been used as the basis of many published classifications. Hunt (2006) recognized Cactaceae family has 4 sub-families viz. Pereskioideae (the leaf cactus, 20 spp.), Opuntioideae (300 spp.), Cactoideae (1,000 spp.) and Maihuenioideae (2 spp.). Three tribes: Pereskieae, Opuntieae, Cereae. Tribe Cereae has 8 sub-tribes: Cereanae, Hylocereanae, Echinocereanae, Echiocactanae, Cactanae, Coryphanthanae, Epiphyelanae, Rhipsolidanae. The cacti of sub-tribe ‘Echinocereanae’ are commonly known as ‘Hedgehogs’.

Introduction
The study of energy flow through the ecosystem is known as Ecological Energetic. Ecological Energetic is the scientific discipline that investigates the movement ofenergy within an ecosystem. The process of energy transfer that takes place within a food chain is referred to as energy flow. The functioning of all species in an ecosystem is dependent on the energy they derive from the energy flow. The ecosystemsustains itself and achieves stability through the process of energy transfer.
Energy Transfer/Flow
Solar energy is the primary source of energy that enters the food chain at the level ofproducers, which are plants. Through the process of  photosynthesis, plants utilize solar energy to transform it into chemical energy, which is then used to produce various components of plants such as leaves, flowers, fruit, branches, trunks, and roots. Plants are referred to as producers in the ecosystem because they have the ability to transformthe sun’s energy directly into their tissues, allowing them to thrive. Herbivores consume the plants as nourishment, so obtaining energy. A significant portion of this energy is expended on the metabolic processes of these organisms, including respiration, digestion, tissue growth, blood circulation, and body temperature regulation. Energy is also expended in activities such as foraging, seeking refuge,reproducing, and nurturing offspring. The predators rely on the herbivores as their source of food.

The economic dimension of natural feed management is fundamental to achieving sustainability in livestock farming, especially because feed representsthe most significant recurring expenditure in animal rearing. Through the adoption of farm-based inputs and time-tested traditional methods, natural feed management minimizes dependence on commercially manufactured feeds, thereby boosting the profitability of small and marginal farming enterprises. In contrast to intensive livestock systems that rely on costly, externally sourced feed, natural farming makes effective use of green fodder, crop residues, kitchen scraps, and locally available alternatives like azolla, moringa leaves, and oilseed cakes many of which are low-cost or readily accessible on the farm.
Significant cost reductions stem from practices such as reusing farm waste, relying on indigenous knowledge for formulating diets, and forgoing synthetic additives and antibiotics. For instance, preserving excess green fodder as silage or hay secures feed supplies for dry periods without resorting to market purchases. Additionally, natural supplements like fermented cow dung and urine mixtures (e.g., Jeevamrit), along with turmeric and neem leaves, offer economical substitutes for commercial growth promoters and veterinary drugs. These approaches contribute to healthier livestock, reduce veterinary interventions, and enhance product quality by avoiding chemical residues.

In India, the procurement and disposal of food grains are governed by several guidelines to ensure food security and fair market practices. Procurement is typically managed by government agencies like the Food Corporation of India (FCI), which purchases grains directly from farmers at minimum support prices (MSP) to stabilize market prices. Farmers are encouraged to sell their produce through designated government procurement centers, ensuring fair prices.
The quality of food grains is a key consideration in procurement. Grains are tested for moisture content, cleanliness, and pest infestation before being accepted. Once procured, the grains are stored in government warehouses, with regular inspections to prevent spoilage and pest damage. For disposal, food grains are distributed through public distribution systems (PDS) to ensure availability to consumers at subsidized rates. Any surplus grains may be sold in open markets, or occasionally exported, to maintain a balance in supply and demand. Effective management ensures food security and minimizes wastage.
PROCUREMENT POLICY OF WHEAT AND RICE
State Government agencies and the Food Corporation of India (FCI) are responsible for purchasing wheat and paddy within the designated period, ensuring that the products meet the prescribed Fair Average Quality (FAQ) specifications and are procured at the Minimum Support Price (MSP) for the Central Pool. This procurement supports the distribution of food under the National Food Security Act (NFSA) and other welfare schemes (OWS).
The Government of India (GoI), in consultation with State Governments and FCI, finalizes procurement estimates for wheat and paddy before each marketing season. These estimates are based on anticipated production, marketable surplus, and the agricultural crop pattern. The procurement of paddy and wheat is carried out under both the Decentralized Procurement System (DCP) and the Non-DCP system.

Branding and packaging play a pivotal role in the fish feed industry by helping companies differentiate their products, build market presence, and earn the trust of fish farmers. In a growing and competitive Indian market, branding enables manufacturers to create a distinct identity through logos, color schemes, quality marks, and promotional messaging focused on elements like scientific formulation, locally sourced ingredients, or eco-frWWiendliness. A well-established brand not only drives sales but also raises awareness among farmers about the advantages of using high-quality, nutritionally balanced feed over inexpensive, inferior options. Packaging, on the other hand, ensures both product protection and information delivery. It preserves feed quality by preventing moisture, contamination, and nutrient loss, thereby maintaining pellet strength and palatability. Properly labeled packaging provides vital details such as nutritional composition, manufacturing and expiry dates, feeding guidelines, batch information, and certifications from regulatory bodies like FSSAI or BIS. Attractive and clear packaging also helps farmers quickly identify the suitable feed for their fish species and rearing systems.

Technological advancements in aquafeed production are significantly reshaping the aquaculture landscape by enhancing feed utilization, sustainability, and nutritional performance while cutting costs and reducing ecological impact. One major innovation is precision feed formulation through artificial intelligence (AI) and machine learning, enabling species-specific diets tailored to growth stages and environmental conditions. This customized approach improves nutrient absorption, reduces waste, and boosts farm profitability. Modern processing methods such as extrusion and cold pelleting have further improved pellet durability, digestibility, and water stability—essential for use in systems like Recirculating Aquaculture Systems (RAS) and offshore cages. The transition from traditional feed ingredients to alternatives like insect meal, microbial biomass, algae, and single-cell proteins is also gaining momentum. These sustainable inputs not only offer high-quality nutrition but also lower the environmental burden associated with fishmeal and soy.

Government initiatives and institutions play a pivotal role in directing the regulation, development, and expansion of India’s fish feed industry. With aquaculture recognized as a key contributor to food security, rural income, and exports, the Indian government has rolled out multiple schemes and policies aimed at supporting sustainable feed production and maintaining quality standards. Entities like the Ministry of Fisheries, Animal Husbandry and Dairying, NFDB, and state fisheries departments provide strategic policy direction, financial incentives, and skill-building programs to benefit both feed manufacturers and fish farmers. Subsidies for establishing feed mills, lowering input costs, and funding research contribute to reducing production expenses and promoting the adoption of science-based feeding techniques. Research institutions under ICAR, such as ICAR-CIFE, ICAR-CIFA, and ICAR-CIBA, are key players in advancing feed-related technologies. They work on developing improved feed formulations, identifying sustainable protein alternatives, and innovating feed processing methods. These institutions also conduct extensive training and extension activities to transfer technologies to the field. FSSAI ensures that feed quality and safety benchmarks are met, safeguarding the health of both aquatic species and end consumers.

This chapter introduces the complement system as an important component of innate and adaptive immunity. It explains the classical, alternative and lectin pathways of complement activation and identifies the molecules involved in each pathway. The formation and functions of C3 convertase, C5 convertase and the membrane attack complex are discussed. Questions address complement-mediated cell lysis, inflammation, chemotaxis and opsonization. The roles of C3b, C3a, C4a, C5a, properdin, factor H and other regulatory proteins are also examined. By covering the activation and regulation of complement, the chapter explains how this system enhances antibody activity and helps eliminate invading microorganisms

This chapter explores the four types of hypersensitivity reactions described under the Gell and Coombs classification. Type I immediate hypersensitivity, Type II cytotoxic reactions, Type III immune-complex disease and Type IV delayed hypersensitivity are examined in detail. The roles of IgE, mast cells, basophils, antibodies, complement and T lymphocytes are highlighted. Clinical examples include anaphylaxis, milk allergy, haemolytic disease, transfusion reactions, serum sickness, glomerulonephritis, farmer’s lung and the blue-eye condition associated with canine hepatitis. Diagnostic applications, including the tuberculin and Coombs tests, are also addressed. The chapter explains how exaggerated or inappropriate immune responses can damage tissues and produce disease.

This chapter examines immune-system failure arising from reactions against self-antigens or inadequate immune responses. It introduces immunological tolerance, central and peripheral tolerance, clonal deletion and clonal anergy. Important autoimmune diseases—including myasthenia gravis, Graves’ disease, systemic lupus erythematosus, multiple sclerosis, rheumatoid arthritis and Sjögren’s syndrome—are considered. The chapter also discusses molecular mimicry and the production of autoantibodies. Primary, secondary and severe combined immunodeficiency disorders are differentiated, with examples such as Chédiak–Higashi syndrome. Immune-privileged sites and immunological paralysis are also covered. These topics explain the mechanisms that normally prevent self-reactivity and the consequences that arise when immune regulation becomes defective.

Food preservation has evolved from traditional household practices to an interdisciplinary field incorporating microbiology, biochemistry, engineering, biotechnology, packaging, nanotechnology and digital intelligence. The book demonstrates that food stability can increasingly be achieved without excessive reliance on synthetic chemical preservatives. Effective preservation requires control of microbial growth, enzyme activity, oxidation, moisture, temperature and environmental exposure while protecting sensory and nutritional quality. Traditional practices remain scientifically valuable, while thermal, non-thermal, biological, packaging and digital technologies offer new possibilities. Future food systems will depend on carefully designed combinations of these approaches to improve safety, shelf life, sustainability, traceability and consumer acceptance while overcoming cost, regulatory and scalability challenges.

This chapter explains how representative soil samples should be collected, labelled, transported and prepared for analysis. It identifies essential sampling equipment, including spades, khurpis, augers, trays, sampling bags, markers and polythene sheets. The recommended procedure involves dividing land into uniform sampling units, collecting soil from several well-distributed locations and combining these portions into a composite sample. The chapter describes V-shaped sampling cuts, suitable sampling depths and sample reduction through quartering. It also lists the field information that should accompany each sample. Procedures for air-drying, grinding, sieving and mixing samples are presented, together with precautions for avoiding unusual areas and contamination.

Moisture present in the atmosphere plays a significant role in weather and climate of the region. There are three major components in the atmospheric moisture.

  I. Humidity

 II. Precipitation

III. Evaporation.

Humidity: The terminology related to humidity and concerned with gaseous form of water i.e. water vapour, several expressions of the amount of water vapour in the air is used. They are as follows.

Cloud usually consists of very small droplets of water which cannot fall appreciably below the cloud base without evaporation. In this condition clouds are stable. Rain drops are about a million times heavier than cloud drops and rain develops only if the cloud droplets grow by some mechanism. Cloud Seeding mechanism depends on the difference in vapour pressure over ice and super cooled cloud, water evaporates of the droplets and migrate to the ice crystal, which grows and begins to fall increasing their growth rate by coalescence with other droplets and eventually melting and falling as rain drops. Presence of ice nuclei determines whether ice crystals form in a supercoold cloud or not. Ice crystals form on naturally occurring nuclei at temperatures of – 10⁰ to 30⁰ C. At warmer temperatures, either the efficient ice-forming nuclei are often deficient in the atmosphere or the cloud may occur with tops supercooled but not to an extent which activates the ice nuclei available. It should be possible to initiate precipitation by introducing ice crystals or by supplying artificial nuclei.

El Nino means ‘The Little One’ or ‘Christ Child’ in Spanish. It was originally recognized by fisherman of the coast of South America as the appearance of usually warm water in the Pacific Ocean, occurring near the beginning of the year i.e. around Christmas. That is why the name is used. El Nino, the periodic warming of Pacific Ocean waters that affects the weather worldwide. C. Fred and T. Andrus of the University of Georgia studied the ancient fish bones from refuse left about 6000 years ago by ancient peoples in Peru and found that ocean catfish lived in water that averaged 60 to 70 warmer than now and that there was little variation in temperature. He concluded that if El Nino was occurring at the modern rate, once every two to seven years, then the bones from the fish would have reflected the temperature variation.

Quadrangle: A cell immediately beyond the arculus (Odonata, Zygoptera).

Quadrat: A four-sided defined area from which a sample is collected, used in population determination.

Quadrivoltine: Four life cycles per year.

Qualitative defenses of plants: Toxins and small-molecular-weight compounds (such as alkaloids) that are active against the physiological systems of phytophagous insects; complex, digestibility-reducing substances (such as tannins) that reduce the ability of insects to feed on plants.

Quantitative specificity: In serology, the principle that a given kind of antibody will react more strongly, under comparable conditions, with the particular kind of antigen used in its formation than with any other substance (cf. Antibody, Antigen, and Precipitin reaction).

Ultra low volume spraying (ULV): The application of pesticides in extremely concentrated or undiluted form using 10 liters or less per hectare (1 gal per acre); highly concentrated pesticide applied without dilution at a rate of 0.5 gallons per acre or less.

Umbilical cord: The cord containing blood vessels supported by connective tissue that unites the embryo or fetus of a mammal with the mother during development in the uterus. (L. umbilicus = navel).

Ungulate: Having hoofs, as a deer or (L. ungula = hoof).

Unguligrade: Walking or adopted for walking on hoofs. (L. ungula = hoof + gradior = to step).

Ungue: Pretarsal claw.

Unguiculate: Having claws, as a cat. (L. unguis = claw).

Xerophyte: Plant adapted for survival in desert or physiologically dry soil.

Xylem: The water-conducting woody tissue in vascular plants.

Xylomycetophagy: Cultivation and feeding upon symbiotic fungi growing in woody tree tissues; for example, some Scolytidae.

Xylophage (adj. xylophagous): An eater of wood.

Xylophagy: Feeding on xylem tissues.

Yellow fever: An infectious, mosquito-transmitted viral disease.

Quadrangle: A square or quadrangular space surrounded by buildings, as on college grounds.

Quadrant: 1. The quarter of a circle, an arc of 90°. 2. An instrument for measuring altitudes.

Quadrilateral: A plane figure with four sides and four angles.

Quarter turn belt: The arrangement of a belt to drive two shafts, which are at right angle.

Quarter turn drive: A belt drive connecting pulleys whose axes are at right angles.

Quartering machine: A machine that bores parallel holes simultaneously in such a way that the centre lines of adjacent holes are at 90 deg. apart (axes of the holes are perpendicular to the plane on which an angular measurement are taken.)

X engine: An in line engine with the cylinder block so arranged around the crankshaft that they resemble the letter X when the engine is viewed from the end.