cultivated horizon meaning in Chinese

耕作层

There was obvious dependence relationship between corn yields with changing of depth of cultivated horizon and available water content , corn yields of the corn belt phaeozem changed regularly
相关分析表明， “平面型”界面土壤玉米产量与各养分含量间无明显相关关系，只有当速效磷、钾含量在五级以下时，产量才受到明显影响。
Analysis showed that corn yields of the corn belt phaeozem positively related to depth of cultivated horizon and content of available water , respectively , which their correlation coefficient was 0 . 788 and 0 . 813 . at the same time , each of organic carbon , cation exchange capacity and available n was significant positively related to com yields
而“波浪型”界面玉米产量与有机质、阳离子交换量、速效氮呈明显相关关系。玉米产量随有机质的增加而呈线性增加，玉米产量与阳离子交换量的相关关系可定量的描述为二项式的形式，相关显著。