Agricultural Economics and Extension
Agricultural economics and extension tests farm business calculations, marketing concepts, and extension methods. Expect questions on cost of cultivation, income measures, benefit–cost ratio, and the classification of extension approaches.
Core rules
- Cost of cultivation includes variable costs (seed, fertilizer, pesticide, labour, irrigation, fuel) and fixed costs (land revenue, depreciation, interest on fixed capital, rent). Total cost is the sum.
- Gross income = yield × price. Net income = gross income − total cost. B:C ratio = gross income ÷ total cost. A ratio above 1 means the enterprise is profitable.
- Farm records: physical records (land, labour, machinery), financial records (cash book, ledger), and inventory. Depreciation allocates the cost of durable assets over their useful life.
- Marketing: channels move produce from farmer to consumer; margins, MSP, market fees, transport, and storage affect price received. Cooperatives and farmer producer organizations improve bargaining.
- Extension methods: individual (farm visit, telephone call), group (demonstration, field day, meeting), and mass (radio, TV, newspaper, poster). Diffusion of innovation stages: knowledge, persuasion, decision, implementation, confirmation.
- Communication needs a source, message, channel, receiver, and feedback.
Worked example
A farm has gross income ₹80,000, variable cost ₹30,000, and fixed cost ₹15,000. Total cost = 30,000 + 15,000 = ₹45,000. Net income = 80,000 − 45,000 = ₹35,000. B:C ratio = 80,000 ÷ 45,000 = 1.78. Reasoning: fixed costs must be included in total cost; using only variable cost would overstate B:C to 2.67.
Traps
Using gross income as profit; omitting fixed costs or depreciation; calculating B:C as net income ÷ cost; classifying a field day as mass media; confusing diffusion stages with adoption categories; ignoring transport and market fees in price received.