Climate-Resilient Agriculture
"Agriculture is uniquely positioned at the crux of the climate crisis—it is simultaneously a major victim of climate change, a significant contributor to greenhouse gas emissions, and possesses immense potential as a carbon sink. This chapter explores the critical overlap between Geography, Economy, and Environment, focusing on the paradigm shift from resource-intensive Green Revolution techniques to climate-resilient, ecological farming."
1. Sustainable & Organic Farming
Sustainable agriculture integrates three main goals: environmental health, economic profitability, and social and economic equity. It seeks to meet society’s present food and textile needs without compromising the ability of future generations to meet their own needs. At the heart of this shift in India is the transition towards Organic Farming.
Organic farming completely avoids or largely excludes the use of synthetically compounded fertilizers, pesticides, growth regulators, and genetically modified organisms (GMOs). Instead, it relies on crop rotations, crop residues, animal manures, and biological pest control to maintain soil productivity.
Launched in 2015 as a sub-component of the Soil Health Management (SHM) scheme under the National Mission of Sustainable Agriculture (NMSA), PKVY is the flagship program promoting organic farming in India.
- Cluster Approach: Farmers are encouraged to form groups or clusters (of 50 or more farmers holding at least 20 hectares in total) to take up organic farming.
- Participatory Guarantee System (PGS): Unlike expensive third-party certifications, PKVY relies on PGS-India certification. This is a peer-review mechanism where local farmers inspect and guarantee each other's organic practices, making certification free and accessible for smallholders.
- Financial Assistance: Provides ₹50,000 per hectare for 3 years, out of which a significant portion is directly transferred to farmers through DBT for procuring organic inputs.
2. Zero Budget Natural Farming (ZBNF) & Conservation Agriculture
While organic farming allows the use of purchased organic inputs (like vermicompost or organic fertilizers), Zero Budget Natural Farming (ZBNF) goes a step further. Pioneered by agriculturist Subhash Palekar, ZBNF advocates for absolutely no out-of-pocket expenditure (Zero Budget) for the farmer, relying entirely on locally sourced, farm-made biological inoculants.
2.1 The Four Pillars of ZBNF
ZBNF is built on four fundamental agronomic practices designed to rejuvenate soil microbiomes and optimize water usage without chemical intervention:
2.2 Conservation Agriculture
Conservation Agriculture (CA) is a set of soil management practices designed to minimize the disruption of the soil's structure, composition, and natural biodiversity. It acts as a powerful tool against desertification and soil erosion. It rests on three interconnected principles:
- Minimum Soil Disturbance (Zero Tillage): Direct planting of crop seeds without plowing the soil. This prevents the release of trapped soil carbon into the atmosphere, making zero-tillage a vital climate mitigation strategy.
- Permanent Soil Cover: Leaving crop residue (like stubble) on the field to act as a mulch. This suppresses weeds, retains moisture, and drastically reduces the need for stubble burning (a major cause of winter air pollution in North India).
- Crop Diversification/Rotation: Planting different crops in succession to naturally break pest cycles and replenish varying soil nutrients (e.g., rotating nitrogen-fixing legumes with cereals).
3. Precision Agriculture, Urban Farming & Soil Health
To feed a growing population amidst shrinking arable land and erratic monsoons, modern agriculture must rely on technology-driven efficiency and unconventional spatial models.
3.1 Precision Agriculture & Micro-Irrigation
Precision agriculture involves observing, measuring, and responding to inter and intra-field variability in crops. Instead of applying water, fertilizers, and pesticides uniformly across a field, precision tools target specific zones based on exact requirements.
Under the banner of Pradhan Mantri Krishi Sinchayee Yojana (PMKSY), the "Per Drop More Crop" component heavily subsidizes micro-irrigation systems. Drip irrigation delivers water directly to the root zone, reducing water loss through evaporation and runoff by up to 60% compared to traditional flood irrigation. When fertilizers are dissolved into this drip system, it is known as Fertigation, which drastically reduces chemical runoff into surrounding ecosystems.
3.2 Urban Agriculture: Redefining Arable Land
Urban agriculture brings food production into metropolitan boundaries, reducing "food miles" (the carbon footprint of transporting food) and utilizing unused structural spaces.
| Technology | Mechanism & Medium | UPSC Key Trait |
|---|---|---|
| Vertical Farming | Growing crops in vertically stacked layers inside controlled environment buildings. | Maximizes yield per square foot; relies on LED lighting and climate control. |
| Hydroponics | Growing plants without soil. Roots are submerged in a nutrient-rich water solution. | Water is recirculated, using up to 90% less water than traditional soil farming. |
| Aeroponics | Roots are suspended in the air and periodically misted with nutrient solution. | Highest oxygenation to roots; requires the least amount of water among all methods. |
| Aquaponics | Symbiotic integration of Aquaculture (raising fish) and Hydroponics. | Fish waste provides natural organic fertilizer for plants; plants filter the water for the fish. |
3.3 Soil Health Card (SHC) Scheme
Launched in 2015, the Soil Health Card scheme aims to issue a printed report to farmers assessing the nutrient status of their specific landholding. It tests for 12 critical parameters: macronutrients (N, P, K), secondary nutrient (S), micronutrients (Zn, Fe, Cu, Mn, Bo), and physical parameters (pH, EC, OC).
The primary environmental goal of the SHC is to combat the severe imbalance in India's fertilizer application. Heavy subsidization of Urea has led to massive overuse of Nitrogen, degrading soil fertility and causing severe groundwater nitrate contamination. The SHC provides customized, crop-specific recommendations to rationalize fertilizer use and restore optimal nutrient ratios.