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Extraction of potassium from some kaolinitic soils of the tropics

 

作者: J.L. Pleysier,   J. Janssens,   A. Cremers,  

 

期刊: Communications in Soil Science and Plant Analysis  （Taylor Available online 1988）
卷期: Volume 19, issue 1  

页码: 69-77

 

ISSN:0010-3624

 

年代: 1988

 

DOI:10.1080/00103628809367920

 

出版商: Taylor & Francis Group

 

关键词: exchangeable K;kaolinitic soils;tropical soils

 

数据来源: Taylor

 

摘要:

Three methods for soil potassium extraction (MNH4OAc pH 7, 0.01 M AgTU and 30 % hot H2SO4) were compared for a variety of kaolinitic soils of the tropics. The AgTU‐extractable K was much higher than theMNH4OAc‐extractable K when vermiculite clay was present in the soil. The correlation between both was given by an R value of 0.937. The amounts of K extracted by 0.01MAgTU and by hot H2SO4were approximately the same. The R value for these two methods was 0.843.

 

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