砂姜黑土中微量元素含量及微肥增产效应研究

丁维新

Contents of Trace Elements in Lime Concretion Fluvo-aquic Soils and Effect of Trace Element Fertilizers on Crop Yield

Ding Weixin

华北农学报 . 1999, (S1): 135 -140 . DOI: 10.7668/hbnxb.1999.S1.029