Our objective was to explore why Sesamum indicum yield declined severely when planted after Rehmannia glutinosa in crop rotation.

我们的目的是探索为什么在熟地黄轮作中种植地黄后，芝麻的收成会急剧下降。

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Also, our farm produces food continuously - one crop after another, all year-round.

同时，我们的农场一直会生产谷物，一个接着一个，全年不休。

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They also plant the same crop year after year, depleting the nutrients in the soil.

年复一年他们重复种同样的农作物，耗尽了土里的营养。

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The recent surge in sugar prices comes after a bad harvest, that of corn after official warnings of a lower-than-expected crop.

ECONOMIST: The charge-sheet against commodity speculators is flimsy

Morisot and Cassatt were prolific artists, but most of their work is ferreted away in museums, making those paintings that do crop up on the market highly sought-after.

WSJ: In the Art World, Women on the Verge