导致这一演替的主要原因为作物布局、耕作制度、栽培方法、管理技术的变化和农药化肥的过量施用。
The main reason for this succession might be the changes in crops distribution, cultivation type, planting method, management technique and over-use of chemical pesticides and fertilizers.
其中农业技术又包含对农作物、农具、耕作和栽培技术、农田水利技术等的考察。
The agricultural technology refers to the study of crops, farm tools, tillage and cultivation technology, farmland's irrigation technology.
其中农业技术又包含对农作物、农具、耕作和栽培技术、农田水利技术等的考察。
The agricultural technology refers to the study of crops, farm tools, tillage and cultivation technology, farmland's irrigation technology.
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