General Agriculture and the Agricultural Environment
This domain tests whether you can describe agriculture as a managed system and explain how the natural environment - climate, soil, relief and living organisms - limits what can be produced and how sustainably.
Farms as systems
Every farm is a system with inputs, processes and outputs. Inputs are natural (rainfall, sunlight, soil nutrients) or managed (seed, fertilizer, labour, capital, machinery). Processes convert them: ploughing, planting, feeding, milking. Outputs are products plus by-products and wastes, which can become pollutants. Name all three parts in a flow diagram or budget answer, and distinguish renewable inputs (manure, legume nitrogen) from non-renewable ones (diesel, mineral phosphate).
Classifying farming systems
Use several independent axes, not one. Scale = area or herd size. Intensity = inputs per hectare per year, so market gardening is intensive on a small plot while ranching is extensive. Purpose = subsistence (most output consumed at home) or commercial (most output sold). Enterprise = arable, pastoral, mixed, horticultural. Labour = family or hired. Also note tenure, mechanisation level and rain-fed versus irrigated status.
Worked example
A farm has 1.5 ha, grows maize and beans, keeps six goats, uses family labour and hand tools, and sells about one-third of the maize. Classify it and justify. Answer: small-scale, low-intensity, mixed crop–livestock, largely subsistence with a commercial element. Reasons: area under 2 ha; hand tools and family labour show low capital input; two crop enterprises plus livestock make it mixed; a minority of output sold makes it subsistence-dominant.
Traps that cost marks
'Intensive' does not mean large - it means high input per unit area. 'Commercial' is decided by the proportion sold, not by farm size. Do not call a farm monoculture if it keeps livestock. Mixed farming (crops plus livestock) is not the same as mixed cropping (several crops in one field).