21. Why row planting is more advantageous than broadcasting? A. because light absorption is minimized B. because wind passage along the inter rows is enhanced C. because it is difficult to access through inter rows D. because movement within the crop area is not convenient 22. What is the system of growing crops in linear pattern in at least one direction? A. broadcasting B. row planting C. mono cropping D. multiple cropping 23. Which of the following is the primary function of farm irrigation system? A. conveying to individual fields within the farm B. diverting water from the water source C. providing a means for measuring and regulating flows D. supply crops with irrigation water in the quantities and at the time it is needed 24. Why to provide an irrigation plan? A. the plan provides a record for future reference B. the plan does not provide step by step information on system installation C. it does not serve as basis on any contractual agreement between the installation contractor and farmer D. it does not generate a material list and to evaluate the anticipated project cost 25. Why most farmers choose surface irrigation? A. because it minimizes soil erosion by applying non erosive streams B. because water is applied in the form of spray C. because it can be used in sloping land to reduce erosion D. because water is applied directly to the crop 26. Why drip irrigation is advantageous than other irrigation system? A. because it minimizes soil erosion by applying non erosive streams B. because water is applied in the form of spray C. because it can be used in sloping land to reduce erosion​