5. Field capacity (FC) and the permanent wilting point (PWP) of sandy loam soil are 0.3 and 0.10 respectively. Determine the total available water for cotton whose average rooting depth during the grooving season is 100 cm, is planted in this soil. If the root of this crop is distributed with the conventional root distribution given in the figure below, determine the values of Readily Available Water (RAW) for each root zone. Also determine the irrigation frequency (7), and the duration of water application (ta) if the infiltration capacity of sandy loam is 5 mm/hr, deep percolation losses are 10%, and the daily average moisture consumption of the crop is 8 mm/day. Root zone extraction depth D D/4 D/4 D/4 D/4 40% 30% 20% 10% Root zone distribution pattern of corn in sandy loam