Excessive drainage of soil water can be checked by the addition of adequate quantities of

Answer Details

Excessive drainage of soil water can be checked by the addition of adequate quantities of compost manure. Compost manure is a type of organic fertilizer that improves soil structure and water-holding capacity. When added to soil, it increases the soil's ability to retain water, thereby reducing drainage. This allows plants to access water more effectively, resulting in better growth and yield. The other options mentioned in the question, N.P.K 15-15-15, sulphate of ammonia, and single superphosphate, are chemical fertilizers that do not directly affect soil water-holding capacity.