他已经大规模地削减了诸如小麦与玉米之类的商品作物，并且把生意焦点放在了柑桔与烟草的出口上，这样就能给他带来他非常需要的外汇。
He has scaled back cash crops such as wheat and maize massively, and focuses on exports of citrus and tobacco, which bring much-needed foreign exchange.
鉴于杨树能够与多种作物兼容，农民们现在可以同时种植小麦、玉米和大量园艺作物。
Because of poplars' compatibility with many crops, farmers can now grow wheat and maize and an abundance of horticulture crops.
罗贝尔与他的同事一起对1980年至2008年的玉米、水稻、小麦和大豆的农作物数据进行了分析。
Lobell and colleagues analyzed agricultural records of corn, rice, wheat, and soybeans from 1980 to 2008.
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