【序号】:1 【作者】:K. W. T. Goulding 【题名】:The availability of potassium in soils to crops as measured by its release to a calcium-saturated cation exchange resin 【期刊】:The Journal of Agricultural Science 【年、卷、期、起止页码】:1984、103期、265-275 【全文链接】:http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=4654792 【序号】:2 【作者】:Haylock, O. J. 【题名】:A method for estimating the availability of non-exchangeable potassium. 【期刊】:Trans.Int. Congr. Soil Sci. 6th Congr. 【年、卷、期、起止页码】:1956、(Paris) II、1、403-408 【全文链接】:暂无 【序号】:3 【作者】:Maclean, A. J. 【题名】:Potassium-supplying power of some Canadian soils 【期刊】:Can. J. Soil Sci