Standardization of crop irrigation using the agrohydrological characteristics, such as texture, bulk density, soil moisture under the lowest water capacity and wiltingmoisture is investigated .
But even in the best of conditions, it can be difficult to judge how much moisture a plant needs until it shows signs of stress: leaf drop, wilting, brown edges.
The results were as the following:(1) In semi-arid region of the Loess Plateau, the soil moisture contents of forestland and wasteland were low, near to the wilting humidity.