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If possible, in the year before you plant potatoes, plant a cover crop to improve the soil and the potato production.

如果可能的话，在中土豆的前一年种一种覆盖作物来改善土壤，提高土豆产量。

In agriculture,it influences the monoculture, crop rotation,crop cover and so on.S ome allelochemicals can be...

培育新的抗虫害、抑草品种，分离、鉴定新的化感物质，深入揭示化感作用的机制，是今后化感作用的研究重点。

The testing results indicate there is a visible regulating effect in soil temperature with crop residue cover.

试验结果表明，残茬覆盖对土壤温度有明显的调节作用，5、10、15、20 cm各层有覆盖相对于无覆盖分别增温1.5~2.1℃、0.9~1.2℃、0.2~0.9、0.4~0.8℃，随着土壤层的加深，覆盖对土壤温度的调节作用越来越小。4月20日至6月15日前后，随着覆盖量的增加，土壤温度开始升高，但覆盖量增加到一定程度后，土壤温度将下降，在6月20日以后，随着覆盖量的增加，土壤温度逐渐降低，其中30%覆盖相对于无覆盖，降低1.1~1.5℃，50%~80%覆盖降低2~3.6℃，而表土层降低幅度最大，沿深度方向幅度越来越小。

For testing the effect of crop residue cover on soil temperature at various percentages of covered areas,the test plot was established in west rainless region of Heilongjiang Province.

在黑龙江省西部干旱区建立不同残茬覆盖对土壤温度影响试验区，采用W QG-16。

Week-stemmed winter annual native to Mediterranean region for long established in southern United States; cultivated as a cover and pasture crop.

茎细弱并常外倾地面上而枝端向上、冬季结荚果的一种豆；原产于地中海地区，但作为一个归化种而在美国南部长期栽种，最近又作为覆盖作物和牧草而栽培。

There was no obvious different in panicle length, fresh weight of panicle and seed setting rate of late rice under different winter cover crop conditions.

稻田冬季覆盖植物有利于改善晚稻产量构成因素，不同程度地提高水稻产量，分别比对照增加649.67，558.64，437.26，783.82kg/hm^2。

Cover crop using Mucuna munaneae as the third crop in the cropping system; zero tillage using herbicide or hand pulling for weed control; mucuna foliage and crop residues are used for mulch.

在种植制度中，用黎豆属作物作为第三季覆盖作物。用除草剂或人工除草实施免耕，把黎豆属作物叶片和其它作物残体，作为覆盖物。

I'll cover for you while you're in Europe.

你在欧洲时，我会帮你代班的。

Woman : One cover girl in the family is enough.

家里有一个封面女郎就足够了。

Cox was a cover girl for People Magazine's "50 most beautiful people in the world" issue.

Cox曾作为"全球50位最美丽的人"上了人物杂志的封面。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。