Agricultural Economics and Farm Management
Domain 4: Agricultural Economics and Farm Management
This domain tests how farmers choose enterprises, keep records, budget and market produce. Questions often require simple calculations and interpretation of farm records rather than theory alone.
Core rules and concepts
- Fixed costs: rent, depreciation, permanent labour; they do not change with the level of production in the short run.
- Variable costs: seed, fertilizer, casual labour, fuel, pesticides; they change with enterprise size.
- Gross margin: gross output value minus variable costs. It measures the return to fixed resources.
- Profit: gross margin minus fixed costs. Do not call gross margin profit.
- Break-even: output or price at which total revenue equals total cost.
Worked example
One hectare of maize gives 2,500 kg, sold at MK 300/kg. Variable costs are MK 450,000. Gross output = 2,500 × 300 = MK 750,000. Gross margin = 750,000 − 450,000 = MK 300,000/ha. If fixed costs are MK 120,000/ha, profit = 300,000 − 120,000 = MK 180,000/ha. The reasoning: first value production, then subtract only variable costs to compare enterprises; subtract fixed costs only to find profit.
Traps that cost marks
- Including fixed costs when calculating gross margin.
- Forgetting family labour or own seed as opportunity costs.
- Mixing units: kg versus tonnes, or per hectare versus per plot.
- Comparing enterprises of different sizes without using per-hectare figures.