Abstract
The technique of drip irrigation is a solution of water saving for crops in the scarce region. Water is supplied on the soil surface directly, continuously and regularly by drippers and then it infiltrates into the cultivated soil layer to ensure that plants will grow and develop well. During the experimental process of researching on soil moisture of drip irrigation technique to determine the suitable irrigation schedule for Grape Leaves at the water scarce region, the authors carried out the experiment and observed infiltration spread. Based on calculated and observed results, the authors have proposed correlation of parameters as follows: infiltration depth, average radius of wetting front on horizontal direction, irrigation water amount versus time, velocity of horizontal (vr) and vertical (vz) permeability of drip irrigation technique. The correlation coefficients of parameters are high (R2 from 0.906 to 0.9899) and conformable to research on soil moisture dynamic in order to determine the suitable irrigation schedule for Grape leaves in particular and for terrestrial plants (with short roots) in general at the water scarce region of the South Central region of Vietnam.
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