... 作物持续栽培法 {农} succession of crops; 作物分布 crop distribution; 作物改良 crop improvement; ...
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第二，粮食作物分布状况可以改善，每英亩土地的粮食产量可以提高。
Second, the distribution of food and the yield of food per acre can be improved.
这种供水方法而不考虑片内作物分布和作物品种差异对需水的要求及土壤的实际含水量。
That is the farmers have no choice but to irrigating by turns. And they can't take into account distributing of crops and water requirement and water content of soil.
例如，这一分析没有追踪现已被耕种地区的产量随时间的变化，反而使用的是2000年前后的作物分布图。
For example, the analysis does not track changes over time in the areas being farmed, using instead a crop map from around 2000.
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