arable layer

the temporal-spatial dynamics of soil organic carbon of arable layer in reversed desertification area

荒漠化逆转地区耕层土壤有机碳时空动态研究

sub-soiling method, you can break the plow pan, and deepen the arable layer.

采用深松耕作法后，可以打破犁底层，加深耕作层。

the potassium status of the arable soil layer in hengshui city and analysis of the effect of k-fertilizer application

衡水市耕层土壤钾素状况及施钾效果分析

results show that the average water values among arable layer in the spring of 2002 and 2004 year are both 21% at longsheng experimental areas, average ec values are ( 0.35) and ( 0.42) ms/ cm, with a small amount of salt accumulation.

结果表明：隆胜实验区2002、2004两年春季耕作层土壤水分平均值稳定为21.0%，电导率平均值分别为0.35ms/cm、0.42ms/cm，有少量积盐。

effects of different fertilizer system in long-term stationary experiment on the sorption characteristics of phosphate by arable layer red-soils

不同施肥制度对红壤耕层磷的吸持特性影响的研究