Answer:

Introduction:

India’s agrarian landscape, underpinned by staple crops like rice and wheat, is witnessing a paradigm shift. Despite the country being the second-largest producer of wheat and rice globally, regions, notably North-west India, have observed declining yields. 

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Major Reasons for the Declining Yield:

• Declining Soil Productivity:
  • Continuous cropping has led to soil fatigue, loss of essential minerals, and an increase in salinity.
  • For example, Punjab, the ‘Granary of India’, has seen a drop in soil fertility due to over-cultivation and absence of fallow periods.
  • Studies indicate that in some regions of Punjab, soil organic carbon levels have decreased by about 15-20% over the last two decades.
• Impact of Climatic Changes:
  • Global warming and erratic monsoons have jeopardized the predictable climate essential for these crops.
  • For instance, wheat production in Haryana faced a setback in 2020 when untimely rains coupled with increased temperatures affected the crop’s maturity.
  • A study by the Indian Agricultural Research Institute found that for every 1°C increase in temperature, wheat yields could decrease by 4-5%.
• Unscientific Agricultural Practices:
  • Over-reliance on chemical fertilizers, pesticides, and improper irrigation techniques have compromised soil health.
  • For example, excessive irrigation in rice fields of Andhra Pradesh led to a condition called ‘alkaline soils’, which are less productive.
  • India uses 2.2 times more fertilizer than the global average per hectare of arable land, as per the World Bank.

Crop Diversification as a Solution:

• Nutrient Management and Soil Health:
  • Different crops extract varied nutrients from the soil. Rotating crops ensures balanced nutrient extraction and replenishment.
  • For example, introducing pulses post a paddy harvest can help fix atmospheric nitrogen, replenishing the soil’s nitrogen content.
  • According to FAO, crop rotation can increase soil nutrient content by up to 25%.
• Conservation of Water Resources:
  • Diversifying into less water-intensive crops can reduce stress on water tables.
  • For instance, transitioning to millets in semi-arid regions can reduce water usage by up to 60% compared to paddy.
  • Millets require just around 250-350 mm of water, whereas rice demands 1250-5000 mm.
• Enhanced Pest and Disease Management:
  • Crop diversification can disrupt the life cycles of pests and diseases specific to a particular crop.
  • For example, introducing mustard in a wheat-paddy rotation can deter pests common to both wheat and rice.
  • As per studies, diversifying crops can reduce pest-related losses by up to 40%.

Conclusion:

India’s agricultural resilience hinges on its adaptability. While rice and wheat are staples, the declining yields necessitate a re-examination of our agricultural practices. Crop diversification emerges as a holistic solution, addressing soil health, water conservation, and pest management. Embracing these shifts can ensure sustained yields, ecological balance, and food security for the nation.

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