Challenges in Improving Agricultural Production — Flashcards
Telangana Board · Class 9 · Biology
20 flashcards for Challenges in Improving Agricultural Production (Telangana Board Class 9 Biology) to test yourself on key terms and facts.
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What is the main challenge highlighted by the food grain production to population growth ratio data in India?
Answer
Food grain production is not increasing proportionally to population growth. In several decades (1971-1981, 1991-2001, 2001-2011), the ratio FP/PG was less than 1, meaning food production growth was s…
Define crop rotation and explain its benefits for soil fertility.
Answer
Crop rotation is the process of growing different crops in sequence on the same agricultural field. Benefits include: (1) Prevents soil nutrient depletion - cereals take nutrients while legumes add ni…
What percentage of absorbed water does a plant actually use for photosynthesis, and what happens to the rest?
Answer
A plant uses only 1% of absorbed water for photosynthesis to produce carbohydrates. The remaining 99% is lost through transpiration - evaporation from leaves through stomata. For example, if a plant a…
Macronutrients
Answer
The three essential nutrients that plants require in large quantities: Nitrogen (N), Phosphorus (P), and Potassium (K). Nitrogen helps in leaf and flower development, Phosphorus aids root penetration …
A farmer notices his rice crop yield decreased when planted a month after monsoon rains compared to planting immediately after rains. Explain why timing of planting affects crop production.
Answer
Proper timing ensures: (1) Optimal moisture availability during critical growth stages, (2) Better utilization of natural rainfall reducing irrigation needs, (3) Favorable temperature conditions for g…
What are weeds and how do they affect crop production?
Answer
Weeds are unwanted plants that grow along with crops in agricultural fields. They affect crop production by: (1) Competing for nutrients from soil, (2) Blocking sunlight needed by crop plants, (3) Con…
Compare organic manure and chemical fertilizers in terms of nutrient content, cost, and soil health impact.
Answer
Organic Manure: Lower nutrient content (1-10%), cheaper, improves soil structure and water retention, slow release of nutrients, enhances soil microbial activity. Chemical Fertilizers: Higher nutrient…
Root nodules
Answer
Small structures on the roots of leguminous plants (like soybean, gram, peas) that contain nitrogen-fixing bacteria. These bacteria convert atmospheric nitrogen into a form that plants can use. After …
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