It is showed from vector analysis: N, P and K are deficient in poplar unfertilized and they are limiting factors to poplar.
矢量法营养诊断结果表明：未施肥的杨树各组织N、P、K均为缺乏状态，N、P、K是杨树生长的限制性因素。
The limiting factors of the agricultural land use are found out based on the analysis of effect that is produced by environment resources.
本文以重庆喀斯特山地为研究对象，分析了当地资源环境条件对农业土地利用的影响，并对重庆喀斯特地区进行了分区；
The results of stepwise multiple regression analysis show that OM, AK, AP, and CEC are the key tobacco quality-limiting factors.
逐步回归显示，土壤有机质、速效磷、速效钾和阳离子交换量对烟叶品质有较大的影响；
The results of stepwise multiple regression analysis show that OM, AK, AP, and CEC are the key tobacco quality-limiting factors.
逐步回归显示，土壤有机质、速效磷、速效钾和阳离子交换量对烟叶品质有较大的影响；
应用推荐