Comparison of soil extractions by 0.01M CaCl2, by EUF and by some conventional extraction procedures |
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| Authors: | V J G Houba I Novozamsky A W M Huybregts J J van der Lee |
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| Institution: | (1) Department of Soil Science and Plant Nutrition, Agricultural University, Wageningen, The Netherlands;(2) The Dutch Sugar Beet Institute (I.R.S.), Bergen op Zoom, The Netherlands |
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| Abstract: | Summary The extractive powers of different extraction procedures (Electro-Ultrafiltration, 0.01M CaCl2 and standard Dutch methods) were compared mutually for a limited number of nutrients in soil samples from 21 locations. The
results showed that for almost all parameters under study (Na, K, Mg, Mn, P, N) the methods are interchangeable. Drawbacks
of the EUF technique are lower reproducibility of the results, laboriousness and high cost. Moreover, the extraction of exchangeable
forms of Mn and Mg with this technique was incomplete. Extraction with 0.01M CaCl2 seems recommendable due to the simplicity of the analytical procedure giving sufficient information for practical soil-analytical
purposes. |
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| Keywords: | 0 01M CaCl2 extraction Determination of ‘ available’ soil nutrients EUF extraction Extraction techniques Soil analysis |
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