Depth of roots zone , dR, is 1.8 (m) in a farm its area is 50 (Hectare). The initial moisture content of the soil in roots zone,

(wv)i%, is 15% and wanted to raise it to its saturated

condition, (wv)s% is 45%. Compute the volume of irrigation

water needed to saturate the soil in Roots zone. Compute the

volume of drained water (Vw)d from the Roots zone. Field

capacity of the soil (wv))F% =32 %.