有水平,外行也能理解。
回答: 精耕細作徒增成本農業就是靠天吃飯,土壤氣候溫度光照是決定因素,改良種子隻是綠色革命四項(灌溉係統,化肥,良種和殺蟲劑)中的一個因
由 NewBird
於 2021-05-22 19:24:30
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