UPSC Agriculture 2021 — Paper I

The directive 'describe' demands factual, structured exposition with clarity and precision across all five sub-parts. Allocate approximately 30 words per sub-part (150 words total), spending roughly equal time on each since all carry 10 marks. Structure each sub-part as: definition/scope → key components/mechanisms → examples/schemes → brief significance. No conclusion needed; prioritize coverage over depth for any single part.

• (a) Sustainable NRM: 3-4 major ways—conservation agriculture (zero tillage, crop rotation), integrated nutrient management (INM), integrated pest management (IPM), watershed management, and agroforestry; mention resource-use efficiency and intergenerational equity
• (b) Quality Protein Maize (QPM): improved agro-practices—selection of opaque-2 or modified opaque-2 varieties, isolation distance (200-400m) to maintain protein quality, proper sowing time, balanced fertilization (especially sulphur and zinc), irrigation scheduling, and post-harvest handling to prevent amino acid degradation
• (c) Social forestry: definition (forestry for community benefit); schemes—National Social Forestry Programme (1985), Joint Forest Management (1990), Farm Forestry, Community Forestry, and Agroforestry; mention NAPCC and Green India Mission linkages
• (d) Rice weeds: upland weeds (Echinochloa crus-galli, Cyperus rotundus, Eleusine indica) vs lowland weeds (Echinochloa colona, Monochoria vaginalis, Marsilea quadrifoliata); management—cultural (nursery raising, transplanting), mechanical (hand weeding), chemical (butachlor, pendimethalin, bispyribac-sodium), and IPM approaches specific to water regime
• (e) Biofertilizers: types (Rhizobium, Azotobacter, Azospirillum, PSB, KMB, Azolla, BGA); constraints—short shelf life, contamination, lack of quality standards, farmer skepticism, inadequate cold chain, poor extension, and incompatibility with chemical fertilizers

The directive 'discuss' demands a comprehensive, analytical treatment with balanced coverage across all three sub-parts. Allocate approximately 40% of word budget to part (a) given its 20 marks, 40% to part (b) for its equal weightage, and 20% to part (c). Structure as: brief introduction defining greenhouse effect → detailed body covering GHG impacts on crops, technology-policy nexus in diversification, and herbicide mechanisms → conclusion synthesizing sustainable intensification challenges.

• Part (a): Scientific definition of greenhouse effect, major GHGs (CO2, CH4, N2O, O3, CFCs) with their GWP values, and specific impacts on photosynthesis, respiration, phenology, heat stress, and yield reduction in major crops
• Part (a): Quantitative data on temperature rise projections for India (e.g., 1.5-2°C by 2050) and crop-specific vulnerability indices
• Part (b): New agricultural technologies (precision farming, GM crops, protected cultivation, IoT, drought-resistant varieties) as drivers of diversification
• Part (b): Market policies (MSP reforms, e-NAM, FPOs, export-import policies, crop insurance) and their incentive/disincentive effects on diversification decisions
• Part (b): Indian examples like shift from paddy-wheat to horticulture/oilseeds in Punjab-Haryana, or millet promotion under NFSM
• Part (c): Herbicide activity modes (contact vs. systemic, selective vs. non-selective) and selectivity mechanisms (morphological, physiological, biochemical)
• Part (c): Specific herbicide examples relevant to Indian agriculture (2,4-D, glyphosate, atrazine, pendimethalin) with crop-weed specificity

The directive 'discuss' demands a comprehensive, analytical treatment across all three parts. Allocate approximately 40% of time/words to part (a) given its conceptual breadth and 20 marks, 35% to part (b) for its technical procedural content, and 25% to part (c) for its factual convention coverage. Structure with a brief integrative introduction, then address each sub-part sequentially with clear sub-headings, and conclude by linking agroforestry and SSNM as climate-resilient agricultural strategies.

• Part (a): Define agroforestry as per ICRAF (land-use system integrating trees with crops/animals); classify into agrisilviculture (e.g., poplar-based system in Punjab), silvopastoral (e.g., Prosopis cineraria in Rajasthan), agrosilvopastoral (e.g., home gardens in Kerala/Northeast), and agroforestry with tree boundaries (e.g., Eucalyptus/Acacia nilotica windbreaks)
• Part (a): Cite specific Indian examples—Khejri (Prosopis cineraria) in arid zones, Shifting cultivation (jhum) in Northeast, Taungya system in Odisha/MP, and recent success stories like Haritha Haram in Telangana
• Part (b): Define SSNM as need-based nutrient application using 4R principle (Right source, rate, time, place); distinguish from blanket fertilizer recommendations
• Part (b): Outline implementation steps—yield gap analysis, soil testing/leaf color chart (LCC) for N, Nutrient Expert tool/GIS-based mapping, customized fertilizer formulation; cite rice-wheat system in Indo-Gangetic Plains and maize in Bihar
• Part (c): Enumerate UNFCCC (1992), Kyoto Protocol (1997), Paris Agreement (2015) with India's NDCs; mention recent initiatives like Glasgow Climate Pact (COP26), Koronivia Joint Work on Agriculture, and India's National Action Plan on Climate Change (NAPCC) with National Mission for Sustainable Agriculture (NMSA)

The directive 'discuss' demands a comprehensive, analytical treatment with balanced coverage across all three sub-parts. Allocate approximately 40% effort to part (a) on soil fertility decline and improvement measures, 40% to part (b) on IFS definition and income enhancement across landholding categories, and 20% to part (c) on biological weed control methods. Structure with a brief introduction, detailed body addressing each sub-part sequentially with clear sub-headings, and a concluding synthesis on sustainable agriculture.

• Part (a): Natural factors (weathering, leaching, erosion) and anthropogenic factors (excessive tillage, monocropping, imbalanced fertilization, residue burning) causing fertility decline; improvement measures including organic amendments, green manuring, biofertilizers, precision nutrient management, and soil health card scheme
• Part (a): Specific mention of secondary and micronutrient deficiencies emerging in intensive Indian agriculture (Zn, B, S) and corrective strategies
• Part (b): Precise definition of IFS as holistic, synergistic combination of crop, livestock, fishery, and allied enterprises with nutrient and resource recycling
• Part (b): Landholding-specific IFS models: marginal farmers (kitchen garden + goatry + poultry), small farmers (rice-fish-duck/azolla), medium/large farmers (dairy-biogas-vermicompost-crop integration) with income diversification and risk reduction mechanisms
• Part (c): Classical biological control (importation of natural enemies like Puccinia chondrillina for skeleton weed), inundative control (bioherbicides like Phytophthora palmivora for milkweed), and competitive suppression (allelopathic cover crops, smother crops like sunn hemp)
• Part (c): Successful Indian examples: Parthenium management through Zygogramma bicolorata, Lantana biocontrol, and integration with mycoherbicide research at NBAIR

This multi-part question requires descriptive responses across five distinct agricultural themes, with part (b) additionally demanding discussion. Allocate approximately 150 words per sub-part (equal distribution since all carry 10 marks). For (a), focus on watershed management and dryland technologies; for (b), begin with a precise ICT definition before discussing initiatives; for (c), explain the CACP formula and Swaminathan Commission recommendations; for (d), cover structural features and implementation data; for (e), detail chemical and physical parameters with threshold values. Maintain thematic coherence without separate introductions for each part.

• (a) Rainfed technologies: in-situ moisture conservation (bunding, terracing), drought-resistant varieties (ICRISAT hybrids), watershed development under WDC-PMKSY; policies: MGNREGA for water harvesting, National Rainfed Area Authority
• (b) ICT definition: digital tools for information exchange; initiatives: Kisan Call Centres (toll-free 1551), mKisan SMS portal, eNAM, Soil Health Card portal, AgriStack, drone-based Kisan drones
• (c) MSP determination: CACP recommendation based on A2+FL cost, C2 cost (Swaminathan formula), market price trends, demand-supply, international prices; crops covered under 22 mandated crops
• (d) PMFBY features: uniform premium (2% kharif, 1.5% rabi, 5% horticulture), use of remote sensing, smartphone-based CCEs; progress: coverage expansion, reduction in claim settlement time, challenges in penetration in eastern states
• (e) Irrigation water quality: SAR/ESP for sodicity hazard, RSC for residual carbonate, EC for salinity, boron/trace element toxicity; classification into C1-C4 and S1-S4 categories

The directive 'explain' demands conceptual clarity with cause-effect linkages across all three parts. Allocate approximately 40% of word budget to part (a) given its 20 marks and technical depth, 35% to part (b) for data integration, and 25% to part (c) for concise case study presentation. Structure as: brief integrated introduction → three distinct sections with clear sub-headings → synthesizing conclusion on sustainable agriculture.

• Part (a): Precise definition of soil erosion (geological vs. accelerated) with classification into water (sheet, rill, gully, splash), wind, and tillage erosion; agronomic measures (contour farming, strip cropping, mulching, cover crops, crop rotation) and mechanical measures (terracing, bunding, gully plugging, check dams) with their specific applicability conditions
• Part (b): Current irrigation potential statistics (net vs. gross, surface vs. groundwater); gap between created and utilized potential; rainwater harvesting techniques (farm ponds, percolation tanks, recharge structures, rooftop harvesting) and their role in bridging the gap
• Part (c): Cooperative marketing concept distinguishing it from cooperative farming; structural components (processing, storage, credit linkage); successful case studies such as AMUL (Gujarat), Karnataka Milk Federation, or Maharashtra's Warana cooperative
• Integration point: Link between soil conservation and water harvesting for sustainable intensification
• Critical analysis: Limitations of mechanical measures in smallholder contexts and cooperative marketing challenges in fragmented landholdings

The question demands a multi-part descriptive response with 'define' as the primary directive for part (a), 'discuss' for parts (b) and (c). Allocate approximately 40% of time/words to part (a) given its 20 marks, 40% to part (b) for its equal weightage, and 20% to part (c). Structure as: concise definitions and concepts for (a), drainage techniques followed by comparative irrigation analysis for (b), and extension approaches culminating in emerging ToT concepts for (c). Conclude with integrated insights on sustainable agriculture.

• Part (a): Precise definition of ecology (E.P. Odum/Tansley); ecosystem, habitat, niche, trophic levels, energy flow, nutrient cycling; relevance in crop production through pest-predator balance, pollination services, and sustainable yield optimization
• Part (b): Surface drainage (open ditches, land grading), subsurface drainage (tile drains, mole drains), bio-drainage with Eucalyptus/Acacia; drip irrigation advantages (WUE 90-95%, fertigation, saline water use) vs limitations (clogging, high initial cost); sprinkler advantages (uniform coverage, frost protection) vs limitations (wind interference, energy cost, foliar disease risk)
• Part (c): Extension approaches—linear (diffusion), participatory (Farming Systems Research), pluralistic (public-private-NGO); emerging ToT concepts: precision agriculture, drone-based advisory, KVK digital platforms, AI/ML crop models, climate-smart villages under NICRA
• Integration: Link ecology principles to water management decisions and extension delivery mechanisms for holistic farm productivity
• Indian examples: Indo-Gangetic waterlogging (Haryana's tile drainage), Gujarat's Jyotigram for drip adoption, Andhra Pradesh's Rythu Bharosa Kendras for extension

The directive 'critically examine' for part (a) demands balanced analysis with judgment, while 'discuss' for parts (b) and (c) requires comprehensive coverage with multiple perspectives. Allocate approximately 40% of time/words to part (a) given its analytical depth and 20 marks, 35% to part (b) for historical evolution and recent changes, and 25% to part (c) for value addition coverage. Structure with a brief integrated introduction, three distinct sections with clear sub-headings, and a conclusion synthesizing policy linkages across extension and price support.

• Part (a): Critical evaluation of T&V system, KVKs, ATMA, and privatized extension models (Kisan Call Centres, agri-clinics) with their limitations in reach and gender bias
• Part (a): Measures for technology dissemination including FPO-led extension, digital platforms (KisanSarathi, WhatsApp-based advisories), and participatory approaches like farmer field schools
• Part (b): Successes of price policy (food security, MSP as floor price, Green Revolution stimulus) and failures (regional bias, procurement gaps, fiscal burden, distortion of cropping patterns)
• Part (b): Recent initiatives including PM-AASHA (PDPS, PSS, PSSS), e-NAM, PM-KISAN income support, and shift from price support to direct income transfer
• Part (c): Value addition in NWFPs including bamboo processing, lac cultivation, medicinal plants (tribal value chains), and institutional support through Van Dhan Vikas Yojana and SFURTI clusters