shift of crops 中文意思是什麼
shift of crops
解釋
作物輪作-
Several trends are converging to reduce the grain area, including the loss of irrigation water, desert expansion, the conversion of cropland to nonfarm uses, the shift to higher - value crops, and a decline in double - cropping due to the loss of farm labor in the more prosperous coastal provinces
糧田面積萎縮是多種趨勢匯合共同作用的後果，包括灌溉用水短缺、沙漠擴大、糧田轉為非農用地、改種高價值作物，以及在比較富裕的沿海省份由於農業勞動力缺失致使一年兩作的萎縮。
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