The suitable soil moisture range was 70% or so. High soil moisture could cause phytotoxicity while low soil moisture could reduce the mixture effect.

该混剂药效发挥的适宜土壤湿度范围是70％左右，土壤湿度过高易造成药害，过低降低药效。

youdao

Mulching wheat stalks into soil can maintain soil moisture, reduce soil temperature, increase soil microbe amount. But the treatment with stalks burned has no the effects.

小麦秸秆直接覆盖还田有助于保持土壤水分，降低土壤温度，增加土壤表层微生物量，而秸秆焚烧还田的作用不显著。

youdao

During observation period, the soil moisture of each layer presents to reduce trend with various time, and it is closely related with rainfall.

在观测期，土壤剖面各土层土壤水分含量在随时间变化呈现减少趋势，与降水量关系显著；

youdao

Rising temperatures also are likely to reduce soil moisture, cutting yields even further.

BBC: Heat may spark world food crisis