【摘要】 本文论述了黄绵土的水分性质与水分分区。黄绵土的重要特征是经常处于水分亏缺状态。不同土地类型的土壤水分水同,各有差异。土壤水分的季节变化分为四个阶段;垂直变化分为四个层次。干旱年与正常年相比,作物的水分转化率各有水同。表明谷子、高梁、土豆的耐旱性强。玉米、黑豆较差。并提出了抗旱保墒措施。更多还原

【Abstract】 The paper discusses the quality of water content in yellow cotton soil andits divisions, The paper suggests that the changes of water content in soilbe divided into four stages as well as the vertical changes according to seasons.The paper also presents the diffrent functions of crops in resisting drought.Finally it gives some suggestions on how to preserve moisture in soil.更多还原