Agriculture 2025 Paper I 50 marks Explain

Q4

(a) Explain the productive, protective, ameliorative, recreational, educational and developmental functions of Indian forests. (20 marks) (b) Explain weed seed bank. Describe the strategies to reduce weed seeds in soil. (20 marks) (c) What is the need for integrated nutrient management (INM)? Suggest INM for transplanted rice. (10 marks)

हिंदी में प्रश्न पढ़ें

(a) भारतीय वनों के उत्पादक, सुरक्षात्मक, सुधारात्मक, मनोरंजक, शैक्षिक और विकासात्मक कार्यों की व्याख्या कीजिए। (20 अंक) (b) खरपतवार बीज बैंक की व्याख्या कीजिए। मृदा में खरपतवारों के बीजों को कम करने की रणनीतियों का वर्णन कीजिए। (20 अंक) (c) एकीकृत पोषक तत्व प्रबंधन (आई० एन० एम०) की क्या आवश्यकता है? रोपाई वाले धान के लिए आई० एन० एम० का सुझाव दीजिए। (10 अंक)

Evaluate your answer to this question → See all 2025 Agriculture questions

Directive word: Explain

This question asks you to explain. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

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, covering six forest functions with Indian examples; 35% to part (b) on weed seed bank dynamics and reduction strategies; and 25% to part (c) on INM rationale and rice-specific recommendations. Structure as: brief introduction on sustainable resource management → systematic treatment of (a), (b), (c) with sub-headings → integrated conclusion linking forest conservation, weed management and nutrient stewardship for sustainable agriculture.

Key points expected

  • Part (a): Six forest functions with Indian specificity—productive (NTFPs like bamboo, tendu leaves; timber from Western Ghats), protective (Shivalik catchment protection, mangrove cyclone buffers), ameliorative (carbon sequestration in Himalayan forests, microclimate regulation), recreational (Jim Corbett, Ranthambore ecotourism), educational (FRI Dehradun, Silent Valley research), developmental (tribal livelihoods, Joint Forest Management)
  • Part (b): Weed seed bank definition (viable seeds in soil profile), vertical distribution (plough layer concentration), longevity mechanisms (hard seed coat, dormancy); reduction strategies—cultural (crop rotation, stale seedbed), mechanical (tillage timing, burial depth), chemical (pre-emergence herbicides), biological (biofumigation, competitive suppression), and integrated approach
  • Part (c): INM need—declining factor productivity, imbalanced NPK use, micronutrient deficiencies (Zn, Fe in rice), soil health degradation, cost-benefit optimization, environmental protection; INM for transplanted rice—green manuring (dhaincha/sunhemp), FYM/compost, biofertilizers (Azolla, BGA, PSB), fertilizer scheduling (basal DAP, split N application, leaf colour chart based N management), residue recycling
  • Integration point: Link forest litter contribution to soil organic matter (part a) with INM in rice (part c), and forest-based weed seed dispersal with agricultural weed management (part b)
  • Policy connect: National Forest Policy 1988, National Agroforestry Policy 2014, Integrated Pest Management under NAPCC, Soil Health Card Scheme relevance

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Concept correctness25%12.5Precise definitions across all parts: distinguishes between forest function categories with clear boundaries (e.g., protective vs. ameliorative), accurately describes weed seed bank dynamics including dormancy mechanisms and vertical stratification, and correctly identifies INM principles (4R stewardship, organic-inorganic synergy) with scientifically sound rice recommendationsBasic definitions correct but some functional overlap or confusion (e.g., mixing protective and ameliorative), generic weed seed bank description without dormancy specifics, INM need stated but rice recommendations lack specificity or include imbalanced nutrient suggestionsFundamental errors: misclassifies forest functions, conflates weed seed bank with weed flora, describes INM as merely 'using all fertilizers' without integration logic, or recommends unsuitable practices for rice ecosystem
Quantitative reasoning15%7.5Incorporates relevant quantitative data: forest cover statistics (ISFR 2021: 24.62% cover), carbon sequestration potential (2.5-3 t C/ha/year in tropical forests), weed seed bank densities (10,000-1,000,000 seeds/m² in cropped soils), seed longevity periods (Chenopodium album 30+ years), INM nutrient use efficiency improvements (15-20% N recovery increase), and optimal NPK ratios for riceMentions some numbers but lacks precision or context (e.g., 'millions of weed seeds' without density reference), rough forest area estimates, or generic efficiency claims without magnitudeNo quantitative support, or factually incorrect figures (e.g., exaggerating seed bank longevity, misstating forest cover trends, unrealistic yield response claims)
Indian context examples25%12.5Rich Indian specificity: for (a) cites Western Ghats biodiversity, Himalayan watershed services, mangrove protection during 1999 Odisha supercyclone, JFM success in Arabari (West Bengal) or Haryana; for (b) references Phalaris minor in rice-wheat system, Echinochloa spp. in rice, Parthenium invasion; for (c) cites ICAR-IRRI research, site-specific recommendations for Indo-Gangetic plains vs. coastal rice ecosystemsSome Indian examples but limited depth—mentions generic 'tribal communities' or 'Indian forests' without regional specificity, common weeds without species names, or standard rice-growing states without agro-ecological nuanceExamples largely absent or inappropriate—relies on temperate forest references, exotic weed species not significant in India, or generic global rice recommendations without Indian adaptation
Diagram / process20%10Includes at least two relevant diagrams: weed seed bank vertical distribution profile showing depletion dynamics with depth; INM flowchart for transplanted rice showing nutrient sources, timing, and interactions; or forest function matrix. Diagrams are properly labelled, scaled, and integrated with text explanationOne diagram attempted but incomplete or poorly integrated—e.g., simple weed seed drawing without bank concept, basic rice crop calendar without INM layering, or forest types map without functional overlayNo diagrams despite high suitability, or irrelevant sketches (decorative forest picture, unrelated nutrient cycle) that don't advance conceptual understanding
Policy / extension angle15%7.5Explicit policy integration: links forest functions to NAPCC, Green India Mission, CAMPA funds; connects weed management to IPM under National Policy on IPM (1985) and pesticide reduction targets; ties INM to Soil Health Card Scheme, Paramparagat Krishi Vikas Yojana, and nutrient-based subsidy policy with critical evaluation of implementation gapsMentions relevant policies by name but superficially—lists schemes without analytical connection to question content, or describes extension methods without policy frameworkPolicy dimension absent, or only generic 'government should' statements without specific scheme identification or critical perspective on effectiveness

Practice this exact question

Write your answer, then get a detailed evaluation from our AI trained on UPSC's answer-writing standards. Free first evaluation — no signup needed to start.

Evaluate my answer →

More from Agriculture 2025 Paper I