Agriculture and the Environment
What this domain covers
Agriculture and the Environment examines how crop and livestock production interact with soil, water, air, biodiversity and climate. In Haryana, the exam expects you to link practices such as paddy cultivation, stubble burning, fertilizer use and irrigation to environmental outcomes, and to know low-cost mitigation options.
Core rules and concepts
- Agroecosystems provide provisioning services (food, fodder, fibre) and regulating services (nutrient cycling, carbon storage, water filtration).
- Nutrient pollution: excess urea and DAP can leach nitrate into groundwater or run off into ponds, causing eutrophication. Apply fertilizer on soil-test basis and split nitrogen doses.
- Residue burning releases particulate matter and loses organic carbon. Happy Seeder, Super Straw Management System and residue incorporation retain carbon and reduce smoke.
- Flooded rice produces methane; alternate wetting and drying reduces methane but must be managed carefully to avoid yield loss.
- Conservation agriculture (zero tillage, residue retention, crop rotation) improves soil organic matter and reduces diesel use.
- Biodiversity: field borders, agroforestry and balanced pesticide use support pollinators and natural enemies.
Worked example
A farmer has 4 ha of rice residue and plans to burn it. Compare burning with Happy Seeder sowing of wheat. Burning costs little cash but destroys roughly the residue carbon, exposes soil to erosion, and adds smoke; Happy Seeder costs more per hectare but retains mulch, conserves moisture and may reduce one irrigation. Reasoning: compare total costs and yields over the rotation, not only the visible cost of the machine pass. The lower-emission option can be economically competitive when water savings and soil benefits are counted.
Traps that cost marks
Do not treat 'environment' as only pollution; include soil degradation, water depletion and biodiversity. Do not claim that all rice cultivation is equally harmful regardless of water management. Do not confuse crop residue with waste-it is a resource.