manure the fields

They could also get precious manure to fertilise the fields.

他们也得到了珍贵的粪肥来滋养田地。

The main results were showed as follows: 1. With the buried nylon bags method a field experiment was carried out in tobacco fields to study dynamics of nutrient release and decomposing rates of Vicia villosa Roth var. as green manure.

获得以下主要结果：1.在田间条件下利用埋设尼龙网袋法研究了光叶紫花苕子做绿肥翻压后的腐解速率及养分释放规律。

The plot and stationary experiments were conducted to investigate the effects of rice-based cropping system, organic manure and groundwater level on methane emission from rice fields at Hunan Agricultural University.

采用大田小区试验和长期定位模拟试验，研究了稻作制、有机肥、地下水位对稻田甲烷排放的影响。

They hauled feedlot manure from the ranches to fertilize their fields.

他们从牧场的饲养场拖走肥料去肥田.

Planting ground cover crops or green manure in the cotton fields protected the overwintering predators and significantly increased their population numbers in the following year.

棉茬地种植越冬作物，增加地面覆盖是保护天敌越冬，大量增加来年天敌数量的有效措施。