Improvement in Food Resources | Science Grade 9 CBSE

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The toolkit for more food

Better food comes from better choices in the field and the shed. Tap each term to see what it does and why it matters for yield.

Explore · Ways to improve food resourcestap a term

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The three big ideas

Crop variety improvement — breeding better varieties (often by hybridisation, crossing dissimilar plants) for higher yield, disease resistance, quality and wider adaptability.
Nutrient management — manure adds organic matter and improves the soil; fertilisers supply specific nutrients (N, P, K) for a quick yield boost.
Irrigation — supplying water through wells, canals, river-lift systems, tanks and rainwater harvesting.

Worked example. What is the difference between manure and fertiliser?

Manure is natural/organic (decomposed plant and animal waste). It adds humus, improving soil structure, aeration and water-holding capacity.

Fertiliser is a manufactured source of specific nutrients (nitrogen, phosphorus, potassium) that boosts yield quickly but adds no organic matter to the soil.

Common mistake: thinking "more fertiliser = more yield". Over-using chemical fertilisers can damage the soil and pollute water — more is not always better. Manure keeps the soil healthy in the long term.

Mixed cropping — growing two or more crops together on the same land at the same time. It lowers the risk of one crop failing.
Crop rotation — growing different crops in a planned sequence on the same field, which uses the soil well and helps maintain fertility.
Crop protection — weeds (unwanted plants) compete with crops for nutrients, water and light; insect pests and diseases also cut yield. They are controlled by weeding, pesticides and good farm practices.

Animal husbandry is the scientific care and breeding of farm animals — their feeding, breeding and disease control.
Cattle are reared for milk (milch animals) and farm labour (draught animals); poultry for eggs (layers) and meat (broilers).
Fisheries give fish from natural waters (capture) and fish farming (culture); apiculture (bee-keeping) gives honey and wax.

Where you'll meet it

Food for everyone

Feeding a growing population

India's population keeps rising while farmland does not. Better crop varieties, irrigation and animal husbandry raise output from the same land so there is enough food, milk, eggs and fish to go round.

Sustainable farming

Manure, crop rotation, mixed cropping and careful use of fertilisers and pesticides keep the soil and water healthy — so the land stays productive for the next generation, not just this season.

Check yourself

Competency quiz

Modelled on the competency-based pattern — MCQ, assertion–reason and a case study, testing whether you can use the ideas, not just recall them.

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