Improvement in Food Resources

The One Thing

Improvement in food resources depends on combining improved crop varieties, scientific farming practices, effective animal husbandry, efficient storage, and sustainable management of natural resources. Increased production must be achieved while maintaining soil fertility, conserving water and biodiversity, and protecting animal welfare.

Reactions, Processes and Experiments

Key Terms

• Crop Variety Improvement: Development of crop varieties with desirable qualities such as higher yield, better quality, disease resistance, early maturity, and tolerance to drought, salinity, heat, or cold.
• Hybridisation: Crossing genetically different plants to combine useful characteristics in their offspring.
• Genetic Modification: Changing an organism's genetic material to introduce a desired trait, such as resistance to a particular pest.
• Nutrients: Substances needed by plants for growth and development. Macronutrients are required in large amounts, while micronutrients are needed in small amounts.
• Manure: A natural substance made from decomposed plant and animal waste that adds organic matter and nutrients to soil.
• Fertiliser: A commercially prepared chemical substance containing specific plant nutrients, commonly nitrogen, phosphorus, or potassium.
• Irrigation: The artificial supply of water to crops at suitable intervals.
• Mixed Cropping: Growing two or more crops together on the same land to reduce the risk of total crop failure.
• Intercropping: Growing two or more crops together in a definite row pattern to use resources efficiently and reduce the spread of pests.
• Crop Rotation: Growing different crops one after another on the same field according to a planned sequence, often including a legume to improve soil fertility.
• Pest and Disease Control: Protection of crops from insects, weeds, fungi, bacteria, viruses, and other harmful organisms through preventive, biological, cultural, or chemical methods.
• Storage Losses: Loss of food grains due to insects, rodents, fungi, bacteria, moisture, and unsuitable temperature during storage.
• Animal Husbandry: Scientific management of domesticated animals, including breeding, feeding, shelter, healthcare, and disease prevention.
• Cattle Farming: Rearing cows, buffaloes, and related animals mainly for milk and agricultural work.
• Lactation Period: The period during which a female mammal produces milk after giving birth.
• Poultry Farming: Rearing birds such as hens, ducks, and turkeys for eggs and meat.
• Broilers: Poultry birds raised mainly for meat and provided with protein-rich feed and suitable care for rapid growth.
• Layers: Poultry birds raised mainly for egg production.
• Fish Production: Rearing and harvesting fish from natural water bodies or controlled systems such as ponds and tanks.
• Composite Fish Culture: Rearing several compatible fish species with different feeding zones in the same pond so that food resources are used efficiently.
• Aquaculture: The controlled farming of aquatic organisms such as fish, prawns, and shellfish.
• Mariculture: The culture of marine organisms in seawater.
• Bee-keeping: Rearing honeybees for honey, beeswax, and other products, while also supporting pollination.
• Pasturage: Availability of flowering plants that provide nectar and pollen to honeybees and influence the quality and quantity of honey.
• Sustainable Agriculture: Producing food in ways that meet present needs while conserving soil, water, biodiversity, and other resources for the future.

Easily Confused

• Manure and fertiliser: Manure is decomposed plant and animal waste that adds organic matter and improves soil structure; fertiliser is a commercially prepared chemical source of specific nutrients.
• Mixed cropping and intercropping: Mixed cropping reduces the risk of total crop failure by growing crops together; intercropping uses a definite row pattern to improve resource use and reduce pest spread.
• Intercropping and crop rotation: Intercropping grows crops simultaneously in planned rows; crop rotation grows different crops successively according to a planned sequence.
• Macronutrients and micronutrients: Macronutrients are required in large amounts; micronutrients are required in small amounts.
• Biotic and abiotic stresses: Biotic stresses are caused by living organisms such as insects, fungi, bacteria, viruses, and weeds; abiotic stresses include drought, salinity, waterlogging, heat, cold, and frost.
• Broilers and layers: Broilers are raised mainly for meat; layers are raised mainly for eggs.
• Capture fishing and culture fishery: Capture fishing obtains fish from natural populations; culture fishery rears fish under controlled conditions.
• Aquaculture and mariculture: Aquaculture is the controlled farming of aquatic organisms generally; mariculture specifically involves marine organisms cultured in seawater.
• Organic farming and integrated pest management: Organic farming uses natural inputs while minimising synthetic chemicals; integrated pest management combines several safe pest-control methods.
• Kharif and rabi crops: Kharif crops are generally grown during the rainy season; rabi crops are generally grown during the winter season.
• Yield and total crop production: Total crop production is the total useful crop obtained; yield is production per unit area: Yield = Total crop production / Cultivated area.

What Gets Asked

• State the objectives of crop variety improvement: Questions may require higher yield, improved quality, resistance to biotic and abiotic stresses, suitable maturity duration, wider adaptability, and desirable agronomic characteristics. Marks are lost by omitting stress resistance or confusing biotic stresses with abiotic stresses.
• Classify plant nutrients or identify their sources: Students may be asked to distinguish macronutrients from micronutrients or state that carbon and oxygen mainly come from air, hydrogen from water, and mineral nutrients from soil. Marks are lost by placing nutrients in the wrong category.
• Compare manure and fertiliser: The expected distinction concerns origin, effects on soil, speed of nutrient supply, and environmental consequences. Marks are lost by stating only that both “help plants grow” without noting that excessive fertiliser use can reduce soil quality and pollute water.
• Distinguish mixed cropping, intercropping, and crop rotation: Questions focus on whether crops are grown together without a specified pattern, together in definite rows, or successively in a planned sequence. Marks are lost by treating all three as identical.
• Explain crop protection and storage management: Questions may ask about weeds, pest and disease control, drying grains, silos, granaries, and moisture-proof containers. Marks are lost by failing to link excess moisture with fungal growth and spoilage.
• Describe animal and fish production systems: Questions may require distinctions among cattle farming, broilers, layers, capture fishing, culture fishery, composite fish culture, aquaculture, and mariculture, including examples such as catla, rohu, mrigal, common carp, silver carp, and grass carp. Marks are lost by confusing production purpose, water environment, or feeding zones.