Question

retention of water by sandy soil

Answer 1

Improving Water Retention in Soil. ...Soils are generally made up of varying mixtures of three sizes of soil particles; sand, silt and clay, known as soil texture. Generally, water retention is inversely related to permeability. Sandy soils have the lowest water retention, followed by silt, and then soils high in clay.

Answer 2

Hydraulic properties, specifically we can say the water holding capacity of soils, play a key role in the ability of soils to sustain plant growth and Additions of hydrophilic polymers (superabsorbents) can improve the water holding capacity of sandy soils.