Few candidates attempted this question. In 4(a) and (b), most of the candidates could define soil erosion and list the factors that influence nutrient availability in the soil.

• Wind distorts sprinkler patterns and causes uneven distribution of water
• The spray force can damage ripening soft fruits
• A stable water supply is required for economic use of the equipment
• The water must be clean and free of sand, debris and large amounts of dissolved salts
• The initial investment is usually high
• Power requirements for pumping water is high
• Requires technical know-how
• Can spread diseases
• Lateral pipes hinder movement of farm machines
• High cost of maintenance/repairs/spare parts not readily available