土壤有效含水量的定义为土壤中能被作物吸收利用的水量，即田间持水量与凋萎系数之间的土壤含水量。
凋萎湿度、田间持水量、整个根区初始土壤有效含水量对土壤水分影响为正效应；
The effects of wilting point, field capacity and initial amount of available soil moisture in root zone on soil moisture were positive.
土壤有效含水量（AWC）是评价土壤抗旱性、水资源规划和管理以及指导灌溉的重要依据。
Soil available water capacity (AWC) plays an important role in the evaluation of drought resistance of soil, planning and managing water resources and conducting irrigation.
所以控制土壤含水量能有效地防止石灰性土壤上花生缺铁黄化症状的发生。
It is suggested that iron chlorosis of peanut grown on calcareous soil could be prevented by controlling soil water content.
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