Home All Journals Communications in Soil Science and Plant Analysis List of Issues Volume 31, Issue 9-10 Soil analysis procedures using 0.01 M ca ....
Volume 31, 2000 - Issue 9-10
Communications in Soil Science and Plant Analysis
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Soil analysis procedures using 0.01 M calcium chloride as extraction reagent
V.J.G. Houba, E.J.M. Temmingho , G.A. Gaikhorst W. van Vark &
Pages 1299-1396 | Published online: 11 Nov 2008
Download citation https://doi.org/10.1080/00103620009370514
Abstract
This publication gives details of laboratory procedures for the determinations of bioavailable (e.g., plants) quantities of nutritional and polluting inorganic elements in 0.01 M CaCl extracts of air‐dry soil samples. Air‐day soil samples are extracted for two hours with a 0.01 M CaCl solution of 20°C in a 1:10 extraction ratio (W/V). After
measuring the pH in the settling suspension, the concentrations of nutritional and polluting elements are measured in the clear centrifugate or ltrate. The procedure is simple, easy to perform, and cheap (labor, chemicals) in daily use in routine soil
laboratories. The method receives internationally more and more attention as an alternative for the many extraction procedures for a single nutrient or pollutant that are still in use nowadays. The soil is extracted with a solution what has more or less
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the same ionic strength as the average salt concentration in many soil solutions.
Various nutrients and metals can be measured in a single extract that allows
considering relationships between them during interpretation of the data. For most elements, di erent detection techniques are described in detail in this publication.
Detailed laboratory procedures are described for the determination of pH, total
dissolved organic carbon, nitrate, ammonium, total dissolved nitrogen, sulphate, total dissolved sulfur, ortho‐phosphate, total dissolved phosphate, sodium, potassium, magnesium, cadmium, copper, nickel, lead, aluminum, iron, arsenic, boron, and
phenols. Since only one extract of soil samples is used, pro table use can be made of multi‐element detection techniques like segmented‐ ow analysis spectrometry, ICP‐
OES, and ICP‐MS.
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