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Which agricultural practice involves growing different crops in a predefined sequence to maintain soil fertility?
Intercropping
Crop rotation
Mixed cropping
Monoculture
Crop rotation
Crop rotation is the practice of planting different crops sequentially on the same plot of land to optimize nutrient usage and improve soil health. By alternating crops with different nutrient requirements, farmers prevent the depletion of specific soil minerals.
Crop rotation is the practice of planting different crops sequentially on the same plot of land to optimize nutrient usage and improve soil health. By alternating crops with different nutrient requirements, farmers prevent the depletion of specific soil minerals.
It is like a balanced diet for the soil; just as a human cannot thrive on one type of food alone, soil needs a variety of plants to replenish different nutrients and prevent 'exhaustion' in specific areas.
R-N-C: Rotation (prevents) Nutrient Collapse.
Biological┬аNitrogen┬аFixation:N2тАЛ+8H++8eтИТ+16ATPтЖТ2NH3тАЛ+H2тАЛ+16ADP+16PiтАЛ
Plants have varying nutritional demands; for example, legumes host nitrogen-fixing bacteria like Rhizobium in their root nodules, which convert atmospheric N2тАЛ into NH3тАЛ or nitrates, enriching the soil for subsequent high-nitrogen demanding crops like maize or wheat. This practice disrupts the life cycles of pests and pathogens that are specific to a single crop host, naturally reducing disease pressure.
Breaks the cycle of crop-specific pests and weeds.
Leguminous crops (e.g., peas, beans) replenish soil nitrogen levels naturally.
Improves soil structure by utilizing different root depths (deep-rooted vs. shallow-rooted).
Reduces dependency on synthetic nitrogenous fertilizers.
Increased soil fertility and organic matter.
Natural pest and disease management.
Reduced soil erosion due to varying root structures.
Requires complex planning and management.
May require different machinery for different crops.
Cereal followed by Legume (Wheat-Soybean rotation).
Cover cropping in organic farming systems.
| Feature | Intercropping | Crop rotation |
|---|---|---|
Growth Pattern | Two or more crops grown together in rows | Different crops grown in temporal sequence |
Nitrogen fixation by legumes can add 50 to 200 kg of nitrogen per hectare annually depending on the species.
Option A (Intercropping) involves growing two or more crops simultaneously on the same field.
Option C (Mixed cropping) involves scattering seeds of two or more crops together without rows.
Option D (Monoculture) is the cultivation of a single crop on the same land year after year, which leads to soil nutrient depletion.
B is correct тАФ Crop rotation involves growing different crops in a specific order to replenish soil nutrients and prevent pest outbreaks.
When answering agricultural questions, link crop selection to nitrogen cycles and pest life cycles to demonstrate a deeper understanding of ecosystem dynamics.
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