Agricultural Economics, Farm Management and Marketing
This domain tests farm business decisions: costs, gross margins, break-even analysis, records and livestock or crop marketing in Namibia.
Core rules
- Variable costs change with the enterprise (seed, fertilizer, feed, casual labour); fixed costs continue regardless (land tax, insurance, permanent labour, depreciation).
- Gross margin = gross income minus variable costs. Profit = gross margin minus fixed costs.
- Break-even yield = total costs divided by price per unit, or variable costs divided by price when only variable costs are covered.
- Partial budgets compare a proposed change, counting only costs and returns that change.
- Livestock may be sold as weaners or finished animals; compare live weight price with carcass price using dressing percentage (about 50-55% for cattle, 45-50% for sheep).
- The Meat Board of Namibia grades carcasses and regulates red meat marketing; the Namibian Agronomic Board regulates grain and horticulture marketing.
Worked example
A 220 kg weaner costs N$28/kg live, or N$6 160. It is fed to 420 kg over 143 days at average daily gain 1.4 kg. Feed costs N$2 200 and other variable costs N$400. Selling at N$30/kg live gives N$12 600. The margin over purchase and variable costs is 12 600 - 6 160 - 2 200 - 400 = N$3 840. The reasoning includes purchase cost and all variable costs, but not fixed costs, so the figure is a gross margin, not profit. Mortality and price risk should also be mentioned.
Traps
- Calling gross margin profit; fixed costs are still unpaid.
- Comparing live weight price with carcass price without dressing percentage.
- Forgetting purchase cost in a livestock budget.
- Mixing per-hectare and per-animal figures.
- Ignoring mortality, shrinkage and marketing costs.