Agriculture 2021 Paper I 50 marks Define

Q7

(a) Define ecology. Mention its basic concepts and relevance in crop production. (20 marks) (b) How to improve drainage of waterlogged areas? Discuss the advantages and limitations of drip and sprinkler irrigation methods. (20 marks) (c) Discuss various approaches of extension. Describe the recent emerging concepts in transfer of technology. (10 marks)

हिंदी में प्रश्न पढ़ें

(a) पारिस्थितिक विज्ञान को परिभाषित कीजिए। इसकी मूल संकल्पना एवं फसल उत्पादन में प्रासंगिकता का उल्लेख कीजिए। (20 अंक) (b) जलजमाव वाले क्षेत्रों में जलनिकास को कैसे सुधार सकते हैं? बूंद (ड्रिप) तथा छिड़काव (स्प्रिंकलर) सिंचाई विधियों के लाभों एवं परिसीमाओं की व्याख्या कीजिए। (20 अंक) (c) विस्तार के विभिन्न दृष्टिकोणों की विवेचना कीजिए। प्रौद्योगिकी के हस्तांतरण की नवीन उभरती हुई अवधारणाओं का वर्णन कीजिए। (10 अंक)

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Directive word: Define

This question asks you to define. 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 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.

Key points expected

  • 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

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Concept correctness25%12.5For (a), defines ecology as scientific study of organism-environment interactions (Odum 1971) with accurate ecosystem components; for (b), correctly distinguishes surface vs subsurface drainage mechanisms and scientifically compares drip/sprinkler WUE, pressure requirements, crop suitability; for (c), accurately categorizes extension generations (top-down to participatory) and identifies precision agriculture, blockchain traceability, KVK 4.0 as emerging ToTBasic definition of ecology as 'environment study'; generic drainage listing without mechanism; superficial drip/sprinkler comparison; mixes extension approaches without generational clarity; vague mention of 'digital farming' without specificityConfuses ecology with environment; equates drainage with irrigation; factually incorrect statements (e.g., drip has highest energy requirement); omits extension approaches entirely or describes only training methods
Quantitative reasoning15%7.5Cites WUE figures: drip 90-95%, sprinkler 75-85%, surface 35-50%; drainage coefficient values (1-3 mm/day for field crops); spacing calculations for tile drains (Houghoudt's equation application); extension coverage statistics (KVKs: 731 as of 2023, reaching 8.5 crore farmers)General statements like 'drip saves water' without percentages; rough drainage estimates; mentions KVK numbers without precisionNo quantitative data; incorrect figures (e.g., drip WUE 50%); confuses units (cm vs mm for drainage)
Indian context examples20%10For (a): cites Mehrgarh agricultural ecology, Western Ghats biodiversity in pest management; for (b): Haryana's subsurface drainage project (1.2 lakh ha), Gujarat's micro-irrigation success (70% area under drip), PMKSY-PDMC; for (c): KVK network, Agri-Clinics and Agri-Business Centres, mKisan portal, IFFCO's drone spraying, Microsoft-APCRDA AI sowing advisoryGeneric mention of 'Indian farmers' or 'government schemes' without naming; one state example for drainage; basic KVK mentionNo Indian examples; uses only international case studies (Israel for drip, USA for extension); irrelevant examples from non-agricultural sectors
Diagram / process20%10For (a): ecosystem structure diagram (biotic-abiotic components, energy flow pyramid); for (b): cross-section of tile drainage system, schematic comparison of drip vs sprinkler layouts; for (c): extension approach evolution timeline or ToT funnel diagram; all diagrams labeled with Indian crop examplesOne relevant diagram (typically energy pyramid or basic drip layout); unlabeled sketches; text-heavy with diagram mentioned but not drawnNo diagrams; or irrelevant diagrams (e.g., photosynthesis cycle for ecology question); diagrams without labels or explanation
Policy / extension angle20%10Links (a) ecology to National Agroforestry Policy 2014, National Mission for Sustainable Agriculture; for (b) critiques PMKSY implementation gaps, suggests Sub-Mission on Agricultural Mechanization for small farm drip adoption; for (c) evaluates ATMA reforms, advocates for farmer producer organizations as extension partners, recommends KVK-ITU convergence for emerging ToTLists relevant policies without critique; mentions PMKSY, National Food Security Mission; generic suggestion to 'strengthen extension'No policy mention; or irrelevant policies (e.g., MGNREGA without agricultural link); purely academic treatment without governance perspective

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