For making sandy soil compact?

Explanation

The correct option is (a) Conserve water. Sandy soils have large particles and low cohesion, making them prone to poor water retention and low compaction. To make sandy soil more compact, conserving water is a suitable practice. Adequate water management helps improve soil structure and increases the cohesion between soil particles. When water is applied judiciously, it promotes better compaction by allowing the soil particles to come into closer contact and reducing the tendency of sandy soil to remain loose and porous. Conserving water also contributes to the formation of aggregates, enhancing the overall structure of the soil.