Paper I — Q5
Answer the following questions in about 150 words each : 10×5=50 (a) Describe the Van Soest method of forage fiber analysis…
Answer the following questions in about 150 words each : 10×5=50 (a) Describe the Van Soest method of forage fiber analysis. 10 (b) Describe the different methods for study of heart sounds in animals. 10 (c) Describe the economic considerations in commercial dairy farming. 10 (d) Describe the various sire indices meant for assessing the breeding worth of bulls. 10 (e) Discuss the various aspects of "National Livestock Mission" intended for livestock development in India. 10
हिंदी में प्रश्न पढ़ें
निम्नलिखित प्रत्येक प्रश्न का उत्तर लगभग 150 शब्दों में दीजिए : (a) चारा रेशा विश्लेषण की वैन सोएस्ट विधि का वर्णन कीजिए । 10 (b) पशुओं में हृदय ध्वनियों के अध्ययन की विभिन्न विधियों का वर्णन कीजिए । 10 (c) वाणिज्यिक डेयरी फार्मिंग में आर्थिक विचार-योग्य बिन्दुओं का वर्णन कीजिए । 10 (d) साँड़ों के प्रजनन मूल्य का आकलन करने के लिए विभिन्न प्रजनक सूचकांकों का वर्णन कीजिए । 10 (e) भारत में पशुधन विकास के लिए अभिप्रेत "राष्ट्रीय पशुधन मिशन" के विभिन्न पहलुओं पर चर्चा कीजिए । 10
Directive word: Describe
This question asks you to describe. 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 'describe' requires systematic, detailed exposition of each component. Allocate approximately 30 words per mark (150 words × 5 parts). Structure each sub-part with: (a) Van Soest method—state principle, NDF/ADF/ADL fractions, reagents used; (b) heart sounds—auscultation sites, phonocardiography, echocardiography; (c) dairy economics—fixed/variable costs, break-even analysis, B:C ratio; (d) sire indices—distinguish between production indices (PIN, NPI) and genetic indices (BLUP-EBV, TMI); (e) NLM—four sub-missions, breed improvement focus, fodder development. No conclusion needed for individual parts; maintain factual precision throughout.
Key points expected
- (a) Van Soest method: Principle of sequential detergent extraction; NDF (cellulose+hemicellulose+lignin), ADF (cellulose+lignin), ADL (lignin) fractions; neutral detergent and acid detergent reagents; relevance for predicting digestibility
- (b) Heart sounds: Auscultation (cardiac valve areas—mitral, tricuspid, aortic, pulmonary); phonocardiography for graphical recording; echocardiography/Doppler for structural/functional assessment; normal S1-S2 vs pathological S3-S4/murmurs
- (c) Dairy economics: Capital investment (cattle, equipment, infrastructure); operating costs (feed, labor, veterinary, breeding); income sources (milk, manure, calves); economic indicators—cost per litre, net income per cow, benefit-cost ratio, break-even point
- (d) Sire indices: Production indices (PIN, NPI, 305-day milk yield); genetic indices (BLUP-EBV for milk, fat, protein; TMI/Total Merit Index combining multiple traits); progeny testing schemes; reliability percentages
- (e) National Livestock Mission: Four sub-missions (breed improvement, feed & fodder, skill development, livestock insurance); entrepreneurship development; breed multiplication farms; Rashtriya Gokul Mission linkage; target beneficiaries (small farmers, women)
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 20% | 10 | Demonstrates precise understanding that 'describe' requires comprehensive, structured exposition without critical evaluation; for (a) presents step-wise methodology, for (b) covers multiple techniques comprehensively, for (c) distinguishes cost categories clearly, for (d) differentiates index types, for (e) covers all sub-mission components | Provides basic descriptions for most parts but misses directive depth in 1-2 sub-parts; may confuse 'describe' with 'discuss' by adding unnecessary critique, or provides mere lists without elaboration | Misinterprets directive—provides definitions instead of descriptions, or critically evaluates where exposition is required; significant sub-parts (2 or more) lack adequate descriptive coverage |
| Content depth & accuracy | 20% | 10 | Scientifically accurate throughout: for (a) correctly identifies NDF-ADF-ADL sequence and reagent chemistry; for (b) accurately locates auscultation points and distinguishes S1/S2; for (c) uses correct economic terminology; for (d) distinguishes contemporary from genetic indices; for (e) correctly states NLM sub-missions and recent targets | Generally accurate with minor errors: vague on Van Soest reagent specifics, conflates some heart sound techniques, uses imprecise economic terms, mixes up index types, or gives outdated NLM information | Major factual errors: wrong fiber fractions, incorrect cardiac anatomy locations, fundamentally flawed economic concepts, confused sire index definitions, or factually wrong NLM components |
| Structure & flow | 20% | 10 | Clear five-part structure with visible sub-headings (a)-(e); each part has internal logical flow—principle→methodology→application for (a), anatomical→instrumental→interpretive for (b), cost→revenue→profitability for (c), indices→calculation→selection for (d), mission→sub-missions→outcomes for (e); smooth transitions between parts | All five parts present but internal organization weak in 2-3 parts; missing sub-headings making navigation difficult; some parts read as disconnected facts rather than coherent descriptions | Poor or missing structure: parts not clearly demarcated, severe imbalance (some parts 20 words, others 80), illogical sequencing within parts, or merged answers making evaluation impossible |
| Examples / case-law / data | 20% | 10 | Appropriate technical specifics: for (a) mentions ANKOM or filter bag technique adaptation; for (b) cites species-specific variations (equine S3-S4 significance); for (c) references NABARD dairy schemes or FPO models; for (d) names NDDB progeny testing network or specific TMI formula; for (e) cites 2021-26 NLM period or Gokul Gram targets | Generic descriptions without specific institutional references; mentions 'modern techniques' or 'government schemes' without naming; no quantitative data or case illustrations in any part | No examples whatsoever; or irrelevant examples (wrong species, wrong schemes, outdated programs); fabricated data or incorrect institutional attributions |
| Conclusion & analytical edge | 20% | 10 | For descriptive questions, demonstrates analytical edge through inter-part linkages—connecting fiber analysis to ration formulation, heart sound assessment to herd health economics, sire indices to NLM's breed improvement goals; brief forward-looking note on precision livestock farming integration | Ends each part abruptly without synthesis; no attempt to connect across sub-parts; purely descriptive without showing how these technical tools integrate into livestock development | No concluding element in any part; or adds unnecessary lengthy conclusions that waste word budget; completely misses the integrated nature of animal husbandry practice |
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