ZIMSEC · Form 5 · Lower 6
Agriculture
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- Soil science and soil fertility Factors: parent material, climate, organisms, topography and time (CLORPT). Processes: weathering, humification, leaching, eluviation and illuviation. Zimbabwe's soils range from infertile granite-derived sands (much of the communal areas) to fertile red clays derived from dolerite and basalt.
- Crop physiology and production Land preparation (conventional tillage versus conservation agriculture), seed selection (certified hybrids, open-pollinated varieties), plant population and spacing, planting date, fertilisation, weed control, irrigation and harvesting.
- Crop protection and integrated pest management Control is justified when pest damage would cost more than the control (economic injury level).
- Animal physiology and nutrition Pearson's square balances two feeds to a target protein level.