共 2 条
[1]
A simple ion-exchange resin procedure for extracting plant-available elements from soil.[J].E. Sibbesen.Plant and Soil.1977, 3
[2]
Studies in soil potassium.[J].P. H. T. Beckett;B. Craig;M. H. M. Nafady;J. P. Watson.Plant and Soil.1966, 3

