Abstract
A new, easily applicable soil extraction method has been developed using the coffee percolator principle. The hot water percolation method (HWP) was examined on 36 soils with different properties. During hot water percolation the available, desorbable, easily soluble elements are extracted by hot water (102–105°C) at 120–150 kPa pressure. The average time for one extraction is 2.6 mm. It is possible to carry out kinetic measurements too. Nearly every nutrient is extracted by this method in measurable quantities, and the macroelements in appreciable quantities. The variation coefficient (CV%) of the method is in average 11%. The results are in close correlation with those of conventional soil testing methods and with the nutrient uptake of the sunflower and ryegrass used as test plants.
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Füleky, G., Czinkota, I. Hot water percolation (HWP): A new rapid soil extraction method. Plant Soil 157, 131–135 (1993). https://doi.org/10.1007/BF02390235
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DOI: https://doi.org/10.1007/BF02390235