Chapter Notes

Improvement in Food Resources

All living organisms need food, which provides proteins, carbohydrates, fats, vitamins, and minerals. These nutrients are required for body development, growth, and health. Plants and animals are major sources of food, obtained through agriculture and animal husbandry.

India's large and growing population necessitates increased food production. Since the land is already intensively cultivated, increasing production efficiency for both crops and livestock is crucial.

The green revolution contributed to increased food-grain production, and the white revolution led to better milk availability. However, these revolutions have intensified the use of natural resources, potentially causing environmental damage. Sustainable practices in agriculture and animal husbandry are necessary to increase food production without degrading the environment.

Food security relies on both the availability of food and people's access to it (purchasing power). Increasing the incomes of those working in agriculture is vital to combat hunger. Scientific management practices, mixed farming, intercropping, and integrated farming (combining agriculture with livestock, poultry, fisheries, or bee-keeping) can lead to sustained livelihoods.

The central question is: How do we increase the yields of crops and livestock sustainably?

Improvement in Crop Yields

Different crops provide different nutrients:

• Cereals (wheat, rice, maize, millets, sorghum): Provide carbohydrates for energy.
• Pulses (gram, pea, black gram, green gram, pigeon pea, lentil): Provide protein.
• Oil seeds (soybean, groundnut, sesame, castor, mustard, linseed, sunflower): Provide fats.
• Vegetables, spices, fruits: Provide vitamins and minerals.
• Fodder crops (berseem, oats, sudan grass): Food for livestock.

Crops require specific climatic conditions, temperature, and photoperiods (duration of sunlight) for growth. Plant growth and flowering depend on sunlight for photosynthesis.

Crops are grown in different seasons:

• Kharif season (June to October, rainy season): Paddy, soyabean, pigeon pea, maize, cotton, green gram, black gram.
• Rabi season (November to April, winter season): Wheat, gram, peas, mustard, linseed.

India has significantly increased food grain production since 1952 with a relatively small increase in cultivated land. This has been achieved through improved farming practices in three stages:

1. Choice of seeds.
2. Nurturing of crop plants.
3. Protection of crops from loss.

Major activities for improving crop yields are:

• Crop variety improvement.
• Crop production improvement.
• Crop protection management.

Crop variety improvement

This involves selecting crop varieties that give a good yield. Breeding is used to select for desirable characteristics like disease resistance, response to fertilizers, product quality, and high yields.

Hybridisation crossing between genetically dissimilar plants is one way to incorporate these desirable traits. This can be:

• Intervarietal between different varieties.
• Interspecific between two different species of the same genus.
• Intergeneric between different genera.

Introducing a gene to provide a desired characteristic results in genetically modified crops.

New crop varieties must produce high yields under various conditions. Farmers need good quality seeds of a particular variety that germinate under the same conditions.

Crop yield is related to weather, soil quality, and water availability. Varieties that can grow in diverse climatic conditions or tolerate high soil salinity are useful.

Factors for variety improvement:

• Higher yield Increase crop productivity per acre.
• Improved quality Improve baking quality in wheat, protein quality in pulses, oil quality in oilseeds, and preserving quality in fruits and vegetables.
• Biotic and abiotic resistance Resistance to biotic (diseases, insects, nematodes) and abiotic (drought, salinity, water logging, heat, cold, frost) stresses.
• Change in maturity duration Shorter duration varieties are more economical, allowing multiple crops per year and reducing production costs. Uniform maturity simplifies harvesting.
• Wider adaptability Stabilizes crop production under different environmental conditions.
• Desirable agronomic characteristics Tallness and profuse branching for fodder crops, dwarfness for cereals to reduce nutrient consumption.

Crop production management

Farming practices vary from small to large farms, with different levels of access to resources. Financial conditions determine the farming practices and technologies used. Higher inputs correlate with higher yields. Production practices range from 'no cost' to 'high cost'.

Nutrient management

Plants require nutrients for growth, supplied by air, water, and soil.

• Air Supplies carbon and oxygen.
• Water Supplies hydrogen and oxygen.
• Soil Supplies thirteen other nutrients.

Macronutrients Nutrients required in large quantities: nitrogen, phosphorus, potassium, calcium, magnesium, sulphur.

Micronutrients Nutrients used in small quantities: iron, manganese, boron, zinc, copper, molybdenum, chlorine.

Deficiency of these nutrients affects physiological processes, including reproduction, growth, and disease susceptibility. Soil can be enriched with nutrients through manure and fertilizers.

Manure Contains organic matter and small quantities of nutrients. It is prepared by decomposing animal excreta and plant waste. Manure enriches the soil with nutrients and organic matter, increasing soil fertility and improving soil structure:

• Increases water holding capacity in sandy soils.
• Improves drainage and prevents water logging in clayey soils.

Using manure protects the environment by reducing fertilizer use and recycling farm waste.

Types of manure:

• Compost and vermi-compost Decomposing farm waste (livestock excreta, vegetable waste, animal refuse, domestic waste, sewage waste, straw, weeds) in pits. Vermi-compost uses earthworms to hasten decomposition.
• Green manure Growing plants like sun hemp or guar and then ploughing them into the soil to enrich it with nitrogen and phosphorus.

Fertilizers Commercially produced plant nutrients that supply nitrogen, phosphorus, and potassium. They promote vegetative growth, leading to healthy plants and higher yields in high-cost farming.

Fertilizers should be applied carefully, considering dose, time, and precautions. Excessive irrigation can wash away fertilizers, leading to water pollution. Continuous use of fertilizers can destroy soil fertility by depleting organic matter and harming microorganisms. Both short-term benefits of fertilizers and long-term benefits of manure should be considered.

Organic farming A farming system with minimal or no use of chemicals (fertilizers, herbicides, pesticides). It maximizes the use of organic manures, recycled farm wastes, bio-agents (blue green algae), and healthy cropping systems (mixed cropping, inter-cropping, crop rotation). These cropping systems control insects, pests, and weeds while providing nutrients.

Irrigation

Most agriculture in India is rain-fed. Poor monsoons cause crop failure. Irrigation ensures that crops get water at the right stages, increasing yields.

Droughts Occur due to scarcity or irregular distribution of rains. Light soils have less water retention capacity, making crops vulnerable to drought.

Irrigation systems in India:

• Wells
  • Dug wells Collect water from water-bearing strata.
  • Tube wells Tap water from deeper strata.
  • Water is lifted by pumps.
• Canals Receive water from reservoirs or rivers, divided into branch canals and distributaries.
• River Lift Systems Draw water directly from rivers to supplement irrigation in nearby areas.
• Tanks Small storage reservoirs that store runoff from smaller catchment areas.

New initiatives to increase water availability include rainwater harvesting and watershed management, using check-dams to increase groundwater levels and reduce soil erosion.

Cropping patterns

Different ways of growing crops can maximize benefits.

Mixed cropping Growing two or more crops simultaneously on the same land (e.g., wheat + gram, wheat + mustard, groundnut + sunflower). Reduces risk and provides insurance against crop failure.

Inter-cropping Growing two or more crops simultaneously in a definite pattern (e.g., soybean + maize, finger millet + cowpea). Crops are selected with different nutrient requirements to maximize nutrient utilization and prevent pests and diseases from spreading.

Crop rotation Growing different crops on a piece of land in a pre-planned succession. The choice of crop depends on moisture and irrigation facilities. Proper crop rotation allows two or three crops to be grown in a year with good harvests.

Crop protection management

Field crops are infested by weeds, insect pests, and diseases.

Weeds Unwanted plants in the field (e.g., Xanthium, Parthenium, Cyperus rotundus). They compete for food, space, and light, reducing crop growth. Weed removal is essential for a good harvest.

Insect pests Attack plants by:

• Cutting roots, stems, and leaves.
• Sucking cell sap.
• Boring into stems and fruits.

Diseases Caused by pathogens (bacteria, fungi, viruses) transmitted through soil, water, and air.

Control methods:

• Pesticides Herbicides, insecticides, and fungicides sprayed on crops or used to treat seeds and soil. Excessive use can be poisonous and cause environmental pollution.
• Mechanical removal
• Preventive methods Proper seed bed preparation, timely sowing, intercropping, and crop rotation.
• Resistant varieties
• Summer ploughing Deep ploughing in summers to destroy weeds and pests.

Storage of grains

Storage losses can be high due to biotic (insects, rodents, fungi, mites, bacteria) and abiotic (moisture, temperature) factors. These factors cause degradation in quality, loss in weight, poor germinability, and discolouration, leading to poor marketability.

Control measures:

• Strict cleaning before storage.
• Proper drying in sunlight and shade.
• Fumigation using chemicals.

Animal Husbandry

Animal husbandry is the scientific management of animal livestock, including feeding, breeding, and disease control. It includes cattle, goat, sheep, poultry, and fish farming. Demand for milk, eggs, and meat is increasing.

Cattle farming

Cattle husbandry is done for milk and draught labor (tilling, irrigation, carting). Indian cattle species include Bos indicus (cows) and Bos bubalis (buffaloes). Milk-producing females are milch animals (dairy animals), and those used for farm labor are draught animals.

Milk production depends on the lactation period (milk production after the birth of a calf). Milk production can be increased by increasing the lactation period. Exotic breeds (e.g., Jersey, Brown Swiss) are selected for long lactation periods, while local breeds (e.g., Red Sindhi, Sahiwal) are disease-resistant. Cross-breeding combines these qualities.

Proper cleaning and shelter are required for humane farming and clean milk production. Animals need regular brushing and well-ventilated sheds that protect them from rain, heat, and cold. The floor of the cattle shed should be sloping for drainage and cleaning.

Dairy animal food requirements:

• Maintenance requirement Food to support the animal's healthy life.
• Milk producing requirement Food required during the lactation period.

Animal feed includes:

• Roughage Largely fiber.
• Concentrates Low in fiber, high in proteins and other nutrients.

Cattle need balanced rations containing all nutrients. Feed additives containing micronutrients promote health and milk output.

Cattle diseases reduce milk production and can cause death. Healthy animals feed regularly and have a normal posture. Parasites can be external (skin diseases) or internal (worms affecting the stomach and intestines, flukes damaging the liver). Infectious diseases are caused by bacteria and viruses. Vaccinations are given against major viral and bacterial diseases.

Poultry farming

Poultry farming raises domestic fowl for egg production and chicken meat. Improved breeds are developed for layers (eggs) and broilers (meat).

Cross-breeding programs between Indian (e.g., Aseel) and foreign (e.g., Leghorn) breeds focus on:

• Number and quality of chicks.
• Dwarf broiler parent for commercial chick production.
• Summer adaptation/tolerance to high temperature.
• Low maintenance requirements.
• Reduction in the size of the egg-laying bird with ability to utilize more fibrous cheaper diets formulated using agricultural by-products.

Egg and broiler production

Broiler chickens are fed vitamin-rich supplementary feed for good growth rate and feed efficiency. Care is taken to avoid mortality and maintain feathering and carcass quality.

Good management practices are important for poultry production: temperature, hygienic conditions, poultry feed, and disease and pest prevention.

Broilers' housing, nutritional, and environmental requirements differ from egg layers. Broiler rations are protein-rich with adequate fat, and high levels of vitamins A and K.

Poultry diseases are caused by viruses, bacteria, fungi, parasites, and nutritional deficiencies. Proper cleaning, sanitation, and disinfectants are needed. Vaccination prevents infectious diseases and reduces losses.

Fish production

Fish is a cheap source of animal protein. Fish production includes finned fish and shellfish (prawns, molluscs). Fish can be obtained from natural resources (capture fishing) or fish farming (culture fishery).

Fish can be sourced from seawater or fresh water (rivers and ponds).

Marine fisheries

India's marine fishery resources include 7500 km of coastline and the deep seas. Popular marine fish varieties include pomphret, mackerel, tuna, sardines, and Bombay duck. Fish are caught using nets from fishing boats. Yields are increased by locating large schools of fish using satellites and echo-sounders.

Some marine fish of high economic value are farmed in seawater: finned fish (mullets, bhetki, pearl spots), shellfish (prawns, mussels, oysters), and seaweed. Oysters are cultivated for pearls.

As marine fish stocks decline, mariculture (culture fisheries) is needed to meet demand.

Inland fisheries

Freshwater resources include canals, ponds, reservoirs, and rivers. Brackish water resources (estuaries and lagoons) are also important. Capture fishing is done in inland water bodies, but the yield is not high. Most fish production is through aquaculture.

Fish culture is sometimes combined with rice crops. More intensive fish farming is done in composite fish culture systems, using local and imported fish species.

A combination of five or six fish species is used in a single fishpond. These species are selected so that they do not compete for food, having different food habits. Catlas are surface feeders, Rohus feed in the middle-zone, Mrigals and Common Carps are bottom feeders, and Grass Carps feed on weeds. This increases fish yield.

A problem with composite fish culture is that many fish breed only during monsoon. Fish seed collected from the wild can be mixed with other species. A major problem is the lack of good-quality seed. Breeding fish in ponds using hormonal stimulation has ensured the supply of pure fish seed.

Bee-keeping

Bee-keeping for honey production has become an agricultural enterprise. It needs low investments, making it an additional income-generating activity. Beehives are also a source of wax used in medicinal preparations.

Local bee varieties for commercial honey production are Apis cerana indica (Indian bee), A. dorsata (rock bee), and A. florae (little bee). The Italian bee variety, A. mellifera, has been introduced to increase honey yield.

Italian bees have high honey collection capacity, sting less, stay in beehives for long periods, and breed well. For commercial honey production, bee farms or apiaries are established.

Honey quality depends on the pasturage (flowers available for nectar and pollen collection). The kind of flowers determines the taste of the honey.

Improvement in Food Resources

All living things, including us, need food to get essential nutrients like proteins, carbohydrates, fats, vitamins, and minerals. These nutrients are crucial for our body's development, growth, and overall health. Our main sources of food are plants, through agriculture, and animals, through animal husbandry.

You might wonder why we constantly need to improve food production. The reason is simple: our population is huge and still growing. In India, with over a billion people, we need massive amounts of food, like more than a quarter of a billion tonnes of grain each year. We can't just farm on more land because most of India's land is already being used for cultivation. Therefore, the only solution is to become more efficient at producing food from both crops and livestock.

Past efforts have led to significant successes:

• The Green Revolution helped increase the production of food grains.
• The White Revolution led to a more efficient supply and availability of milk.

However, these revolutions put a heavy strain on our natural resources. Using resources too intensively can damage the environment and destroy its natural balance. This means we face a new challenge: we must increase food production in a way that is sustainable, without degrading our environment.

Furthermore, just producing more grain and storing it isn't enough to solve hunger and malnutrition. People also need to be able to afford food. This concept is called food security, which depends on both the availability of food and access to it. Since most of our population depends on agriculture for their livelihood, increasing the income of farmers is essential to fight hunger. To achieve this, farmers can adopt scientific management practices and integrated farming systems.

Improvement in Crop Yields

Different crops provide us with different essential nutrients.

• Cereals like wheat, rice, maize, and millets give us carbohydrates for energy.
• Pulses like gram (chana), peas, and lentils provide us with protein.
• Oil seeds like soyabean, groundnut, and sunflower give us necessary fats.
• Vegetables, spices, and fruits supply a range of vitamins and minerals.
• Fodder crops like berseem and oats are grown as food for livestock.

Crops have specific requirements for growth, including climate, temperature, and photoperiods (the duration of sunlight). Based on the season they are grown in, crops are divided into two main types:

• Kharif crops are grown in the rainy season (June to October). Examples include paddy (rice), soyabean, maize, and cotton.
• Rabi crops are grown in the winter season (November to April). Examples include wheat, gram, peas, and mustard.

To improve crop yields, agricultural practices can be divided into three main stages:

1. Crop variety improvement: Choosing the right seeds.
2. Crop production improvement: Nurturing the crop plants.
3. Crop protection management: Protecting the crops from harm.

Crop variety improvement

This approach focuses on developing crop varieties that produce a high yield and have other useful qualities. Scientists and farmers can select or breed plants for characteristics like disease resistance, better quality, and high yields.

Two main methods are used to improve crop varieties:

1. Hybridisation: This involves crossing genetically different plants to combine their desirable traits. This crossing can be between different varieties (intervarietal), different species of the same genus (interspecific), or even different genera (intergeneric).
2. Genetic Modification: This involves introducing a specific gene into a plant to give it a desired characteristic. The resulting crops are known as genetically modified crops.

For a new crop variety to be successful, it must be able to produce high yields in various conditions. Farmers also need access to good quality seeds that are all of the same variety and germinate uniformly.

Variety improvement is done for several key factors:

• Higher yield: To increase the amount of crop produced per acre.
• Improved quality: Different crops have different quality needs. For instance, baking quality is important for wheat, protein quality for pulses, and preserving quality for fruits.
• Biotic and abiotic resistance: Biotic factors are living threats like diseases, insects, and nematodes. Abiotic factors are non-living environmental stresses like drought, salinity (high salt in soil), waterlogging, heat, and cold. Varieties resistant to these stresses can significantly improve production.
• Change in maturity duration: Shorter-duration crops are more economical. They allow farmers to grow multiple crops in a year and reduce production costs.
• Wider adaptability: Developing varieties that can grow in different climatic conditions helps stabilize crop production across various regions.
• Desirable agronomic characteristics: These are physical traits that help increase productivity. For example, dwarfness is desired in cereals so they consume fewer nutrients, while tallness and lots of branches are good for fodder crops.

Crop production management

How a crop is managed depends heavily on the farmer's financial situation and access to technology. Production practices can range from 'no cost' to 'high cost'. This management involves looking after the plant's needs, such as nutrients, water, and cropping patterns.

Nutrient management

Just like us, plants need nutrients to grow. They get these nutrients from three main sources: air (carbon, oxygen), water (hydrogen), and soil. The soil supplies thirteen essential nutrients, which are divided into two groups based on the quantity plants need.

• Macro-nutrients: Nutrients required by plants in large quantities. These include nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur.
• Micro-nutrients: Nutrients required by plants in small quantities. These include iron, manganese, boron, zinc, and copper.

A deficiency in these nutrients can affect a plant's growth, reproduction, and ability to fight diseases. To increase yield, farmers enrich the soil with nutrients using manure and fertilizers.

Manure Manure is made from decomposing animal waste (like cow dung) and plant waste. It is rich in organic matter and supplies small amounts of nutrients to the soil.

• Benefits of Manure:
  • Improves soil structure.
  • Increases water-holding capacity in sandy soils.
  • Improves drainage in clayey soils to prevent waterlogging.
  • It's an excellent way to recycle farm waste and protect the environment from the overuse of chemical fertilizers.
• Types of Manure:
  • Compost: Created by decomposing farm and domestic waste (like vegetable scraps, sewage waste, and straw) in pits. Vermi-compost is a type of compost made faster with the help of earthworms.
  • Green manure: This involves growing fast-growing plants like sun hemp or guar and then ploughing them into the soil before planting the main crop. These green plants decompose and enrich the soil, especially with nitrogen and phosphorus.

Fertilizers Fertilizers are commercially produced chemicals that supply specific nutrients like nitrogen, phosphorus, and potassium. They are a key factor in high-yield farming because they promote strong vegetative growth (leaves, branches, flowers).

Organic Farming This is a farming system that uses minimal or no chemical fertilizers, herbicides, or pesticides. Instead, it relies on:

• Organic manures and recycled farm waste.
• Bio-agents like blue-green algae to act as biofertilizers.
• Natural bio-pesticides like neem leaves or turmeric for grain storage.
• Healthy cropping systems like mixed cropping and crop rotation.

Irrigation

In India, most agriculture is rain-fed, meaning it depends on the monsoon. A poor monsoon can lead to crop failure. Irrigation is the process of supplying water to crops to ensure they get water at the right stages of growth, which can dramatically increase yields.

Various irrigation systems are used in India, depending on the available water resources:

• Wells: These can be dug wells that collect water from shallow underground layers or tube wells that tap water from deeper layers using pumps.
• Canals: An extensive system where canals carry water from rivers or reservoirs to fields.
• River Lift Systems: Water is pumped directly from rivers to irrigate nearby areas.
• Tanks: Small reservoirs that collect and store rainwater runoff.

Newer initiatives like rainwater harvesting and watershed management (building small check-dams) are being used to increase the availability of groundwater for agriculture and reduce soil erosion.

Cropping patterns

Using different methods of growing crops can maximize benefits and yields.

• Mixed cropping: Growing two or more different crops simultaneously on the same piece of land. For example, growing wheat with gram. This strategy provides insurance against the failure of one of the crops.
• Inter-cropping: Growing two or more crops at the same time in the same field but in a definite pattern, like alternating rows. For example, a few rows of soyabean followed by a few rows of maize. The crops are chosen so they have different nutrient requirements, ensuring maximum use of soil nutrients. This pattern also helps prevent pests and diseases from spreading through the entire field.
• Crop rotation: The practice of growing different crops on a piece of land in a pre-planned succession. For example, planting a crop that uses a lot of nitrogen, followed by a crop like a pulse that helps restore nitrogen to the soil. Proper crop rotation can allow for two or three good harvests in a year.

Crop protection management

Crops in the field are vulnerable to attacks from weeds, insect pests, and diseases. If not controlled, these can cause significant crop loss.

• Weeds are unwanted plants (e.g., Xanthium, Parthenium) that compete with the main crop for food, space, and light, reducing its growth.
• Insect pests can damage plants by cutting roots, stems, and leaves; sucking sap from the plant; or boring into stems and fruits.
• Diseases in plants are caused by pathogens like bacteria, fungi, and viruses, which can be transmitted through soil, water, and air.

Control methods include:

• Pesticides: These are chemicals used to kill pests. They include herbicides (for weeds), insecticides (for insects), and fungicides (for fungi). However, excessive use can be poisonous to other species and cause environmental pollution.
• Mechanical removal: Physically removing weeds from the field.
• Preventive methods: These are often the most effective and sustainable ways to control pests and weeds. They include proper seedbed preparation, timely sowing of crops, using pest-resistant varieties, and practices like intercropping and crop rotation.

Storage of grains

After harvesting, it is crucial to store grains properly. Significant losses can occur during storage due to two types of factors:

• Biotic factors: Living organisms like insects, rodents, fungi, mites, and bacteria.
• Abiotic factors: Non-living conditions like inappropriate moisture levels and temperatures in the storage area.

These factors can lead to poor quality, loss in weight, discoloration, and poor germinability, making the produce unmarketable. To prevent this, preventive measures are taken before storage, including:

1. Thoroughly cleaning the produce.
2. Properly drying the produce, first in the sun and then in the shade.
3. Fumigation, which involves using chemicals that can kill pests in the storage area.

Animal Husbandry

Animal husbandry is the scientific management of livestock. It covers all aspects of caring for farm animals, including feeding, breeding, and disease control, to improve their production. It includes cattle, poultry, and fish farming, among others. As our population and living standards rise, so does the demand for milk, eggs, and meat.

Cattle farming

Cattle are raised for two main purposes:

1. Milk production (milch animals or dairy animals).
2. Draught labour for farm work like tilling and irrigation (draught animals).

In India, common cattle include cows (Bos indicus) and buffaloes (Bos bubalis). To increase milk production, a key factor is the lactation period—the period of milk production after a calf is born.

To improve breeds, cross-breeding is commonly used. Exotic breeds (foreign), like Jersey and Brown Swiss, are selected for their long lactation periods, while local breeds, like Red Sindhi and Sahiwal, are known for their excellent disease resistance. By crossing them, we can get animals that have both desired qualities.

Proper management of cattle is essential for their health and for producing clean milk.

• Shelter: Animals need clean, well-ventilated sheds with a sloping floor to stay dry and facilitate cleaning.
• Food: A dairy animal's diet includes roughage (high-fibre food) and concentrates (low-fibre, high-protein food). They need a balanced ration with all nutrients in the right proportions.
• Disease control: Cattle can suffer from external parasites (on the skin) and internal parasites (like worms). They are also susceptible to infectious diseases caused by bacteria and viruses. Regular vaccinations are crucial to prevent major diseases.

Poultry farming

Poultry farming is done to raise domestic fowl for egg production and chicken meat.

• Birds raised for eggs are called layers.
• Birds raised for meat are called broilers.

To improve poultry breeds, cross-breeding programs between Indian breeds (like Aseel) and foreign breeds (like Leghorn) are common. These programs aim to develop varieties with desirable traits such as:

• High number and quality of chicks.
• Tolerance to high temperatures.
• Low maintenance requirements.
• Ability to consume cheaper, high-fibre diets.

Egg and Broiler Production The management for broilers and layers differs.

• Broilers require a protein-rich diet with adequate fat and high levels of vitamins A and K to ensure a good growth rate. They are raised for meat and sent to market.
• Layers have different nutritional and housing needs focused on egg production.

Good management practices for all poultry include maintaining proper temperature and hygiene in their housing, providing nutritious feed, and preventing diseases through sanitation, disinfection, and vaccination.

Fish production

Fish is a cheap and important source of animal protein. There are two main ways to obtain fish:

1. Capture fishing: Catching fish from natural sources like oceans, rivers, and lakes.
2. Culture fishery: Farming fish, also known as aquaculture.

This can be done in both marine (seawater) and inland (freshwater) ecosystems.

Marine fisheries

India has a vast marine fishery resource with a 7500 km coastline. Popular marine fish include pomphret, mackerel, and tuna. Fishermen use large fishing nets, and technology like satellites and echo-sounders helps locate large schools of fish in the open sea to increase yields.

As wild fish stocks decline, mariculture (marine culture fishery) is becoming more important. This involves farming high-value marine species like prawns, mussels, and oysters in seawater.

Inland fisheries

Inland water resources include freshwater sources like canals, ponds, and rivers, as well as brackish water sources like estuaries, where freshwater and seawater mix. While capture fishing occurs here, most production comes from aquaculture.

A highly efficient method is the composite fish culture system.

• In this system, a combination of five or six different fish species are grown together in a single pond.
• The species are chosen carefully so they have different food habits and do not compete with each other.

A major challenge in fish farming is the availability of good-quality fish seed (eggs), as many species only breed during the monsoon. To solve this, scientists have developed methods to breed these fish in ponds using hormonal stimulation, ensuring a steady supply of pure fish seed.

Bee-keeping

Bee-keeping, or apiculture, has become a popular agricultural enterprise for producing honey and beeswax. It requires low investment and provides an additional source of income for farmers.

Several varieties of bees are used for commercial honey production. While local varieties like the Indian bee (Apis cerana indica) are used, an Italian bee variety, A. mellifera, is commonly preferred.

• Desirable traits of Italian bees:
  • They have a high honey collection capacity.
  • They sting less.
  • They stay in a beehive for long periods and breed well.

The quality and taste of honey depend on the pasturage, which refers to the flowers available to the bees for collecting nectar and pollen. The type and abundance of flowers in an area determine the final product. Bee farms, or apiaries, are established for commercial honey production.