Field procedure helps calculate irrigation time for cracking clay soils

Available soil moisture and low soil salinity are difficult to maintain in clay soils of arid regions due to the clay's low permeability. However, a simple procedure has been developed for estimating the duration of flood irrigation needed to saturate the cracked profile in these soils, while improving water conservation through limiting excess runoff. Using a worksheet, the irrigator makes a few measurements, then calculates how long to irrigate each border.