The effective nutrients of 21 samplings of the plough layer (0-20cm) of 4 kinds of major soils of Henan province, were analyzed.

• 摘要对河南省主要土壤耕层21个样区的土样有效养分含量进行测定分析，结果表明：河南省主要土壤耕层的有机质含量稍缺；