Most upland crops such as corn and cotton cannot survive in soils that are water-saturated because of the greatly reduced oxygen content.
大多数旱地作物，如玉米和棉花不能在被水饱和的土壤中存活，因为氧的含量大大减少了。
The relationship of cotton hollow yarn tensile strength against PVA content is tested, analyzed and discussed.
并对棉型中空纱的强力与PV A含量的关系进行了试验、分析与讨论。
The seedling status, the seedling characters and chlorophyl content of maize, cotton and groundnut after seed soaking with root and seedling promoter were investigated.
对生根壮苗剂浸种后的玉米、棉花、花生的出苗状况、幼苗植株性状及叶绿素含量进行了调查。
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