Previous studies predicted massive releases of organic carbon from fields converted from grass to corn or other energy crops.
之前的研究表明，由草地转化成玉米地或其他能源作物用地的农田会释放出大量有机碳。
The System gives scientific institutions, farmers, and private sector plant breeders the opportunity to work with the materials stored in gene Banks or even crops growing in fields.
该系统为科研机构、农民和私营部门的植物育种者提供了利用那些保存在基因库甚至生长在田间的遗传材料的机会。
As a result, many farmers are letting their fields lie fallow or switching from thirsty crops, such as cotton, to those that need less.
因此，许多农场主让土地休耕，或不再种植棉花一类需水量大的作物，而改种那些需水量更小的作物。
Parked alongside his onion fields, Bob Hale can prop open a laptop and read his email or, with just a keystroke, check the moisture of his crops.
鲍布在洋葱地旁停下车，打开笔记本电脑，轻击按键，浏览他的电子邮件，核查作物的湿度。
(of land or fields) prepared for raising crops by plowing or fertilizing.
(指土地或田地)通过耕作、施肥准备好种植农作物。
The growing of crops requires fields. Many fields are created by clearing, or removing, trees.
作物生长需要田地，许多田地是靠清理或扫除树木而来。
Fields of irrigated crops are dark blue squares or circles, showing that the growing plants are taking up and transpiring water.
或方或圆的灌溉农田长满庄稼，呈现深蓝色，说明旺盛生长的植物正在汲取水分并将其蒸发。
Fields of irrigated crops are dark blue squares or circles, showing that the growing plants are taking up and transpiring water.
或方或圆的灌溉农田长满庄稼，呈现深蓝色，说明旺盛生长的植物正在汲取水分并将其蒸发。
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