Question

Approximately how much plant available water would there be in 1 m of a clay loam soil with a soil water content of 23%? 30 mm 10 mm 50 mm 70 mm

Answer 1

Answer:

30 mm

Explanation:

$Plant\ available\ water = Field\ capacity - Permanent\ wilting\ point$

Given:

$Field\ capacity = 23\ \%\ of\ 1\ m =0.23\ m=230\ mm$

Permanent wilting point for the clay loam soil is approximately equals to 20% So,  

$Permanent\ wilting\ point= 20\ \%\ of\ 1\ m =0.20\ m=200\ mm$

Thus,

Plant available water = 230-200 mm = 30mm