WACE ATAR Agribusiness cheat sheet

Gross margin per hectare = (yield × price) − variable costs; fixed costs and overheads are excluded and allocated separately at the whole-farm level.

Break-even yield = total variable costs ÷ price per unit; break-even price = total variable costs ÷ yield, holding the other variable constant.

Dry sheep equivalent (DSE) standardises stocking rate: a 50 kg wether at maintenance equals 1 DSE, allowing comparison of enterprises on a common feed-demand basis.

Feed conversion ratio (FCR) = feed consumed ÷ liveweight gain; lower FCR means more efficient conversion of feed into saleable product.

Dressing percentage = carcass weight ÷ liveweight × 100; it varies with species, breed, fat score and time off feed before slaughter.

Water activity below about 0.6 inhibits microbial growth; low aw plus acidification or thermal processing underpins most food preservation methods.

Cold chain integrity requires product held at or below 4 °C for chilled and −18 °C or colder for frozen storage to limit microbial proliferation.

Yield gap = potential yield − actual yield; it quantifies losses from pests, nutrition, water stress, timeliness and harvest efficiency.

Processing margin = wholesale product value − raw input cost − processing cost; it explains why farm-gate and retail prices move independently.

Gross margin = gross income − variable costs; it is the standard unit of enterprise comparison in Australian farm budgeting.

Farm business profit = gross margin − overheads − depreciation − finance costs; depreciation is a non-cash cost but reduces taxable profit.

Return on assets = operating profit ÷ total assets; return on equity = profit ÷ owner equity, and ROE exceeds ROA when debt earns more than its interest cost.

Equity ratio = owner equity ÷ total assets; a ratio below about 70% signals rising financial risk exposure to interest rate and price shocks.

Break-even price = (fixed costs + variable costs) ÷ saleable output; it sets the floor a forward contract or hedge must clear.

Gross margin per hectare is the correct basis for comparing enterprises of different scale; per-head figures mislead across stocking rates.

Price elasticity of demand = % change in quantity demanded ÷ % change in price; inelastic demand (|e| < 1) means price rises lift total revenue.

Basis = local cash price − futures price; it reflects transport, storage and local supply-demand and is the component a producer can hedge separately.

Marketing margin = retail price − farm-gate price; a widening margin means value is being captured downstream of the farm gate.

Soil pH (CaCl2) below about 4.8 in the topsoil constrains legume nodulation and root growth; liming rate is set by pH buffering capacity and target pH.

Ground cover above roughly 70% substantially reduces wind and water erosion risk; bare ground and sheet flow are the leading indicators of degradation.

Water use efficiency = saleable product ÷ water used (kg/mm or $/ML); it converts limited water into a comparable productivity measure.

Carbon footprint per unit of product = total emissions ÷ output; methane from ruminant digestion and nitrous oxide from nitrogen fertiliser dominate.

Nitrous oxide has a global warming potential roughly 273 times that of carbon dioxide over 100 years; methane is roughly 28 times.

Nutrient balance = nutrients applied − nutrients removed in product; a persistent positive balance signals loss risk to waterways and groundwater.

Integrated pest management thresholds trigger chemical use only when pest numbers exceed the economic injury level, preserving natural enemies.

Salinity risk rises where the watertable is within about 2 m of the surface; perennial pasture and deep-rooted species lower recharge and the watertable.

Labour efficiency = hectares or livestock units per labour unit; it benchmarks whether labour is deployed productively across the enterprise.

Marginal revenue product of labour = additional output value from one more worker; hire while MRP exceeds the wage plus on-costs.

Enterprise mix diversification reduces income variance only when the enterprises' returns are not perfectly positively correlated.

Succession planning requires documented transfer of management control and asset ownership, not merely inheritance intentions.

Work health and safety duty requires hazard identification, risk assessment, control implementation and review as a continuous cycle.

Return on capital invested in a new enterprise = additional annual profit ÷ capital outlay; compare against the opportunity cost of funds.

Span of control describes how many staff one manager supervises; wider spans suit routine tasks, narrower spans suit complex or risky work.

Capacity utilisation = actual output ÷ maximum feasible output; idle capacity raises fixed cost per unit and erodes enterprise margins.