Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 558252
Title Description of the phosphorus sorption and desorption processes in coarse calcareous sandy soils
Author(s) Schoumans, Oscar F.
Source Soil Science 179 (2014)5. - ISSN 0038-075X - p. 221 - 229.
Department(s) Sustainable Soil Use
Integraal water-en
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) calcareous soils - calcite - desorption - kinetics - phosphate - phosphate sorption capacity - Phosphorus - precipitation - sorption

In order to understand and predict the behavior of phosphorus (P) in calcareous sandy soils, sorption and desorption studies were carried out. Two main processes were distinguished: a fast, reversible phosphate reaction (within 1 day), which can be described by the Langmuir equation, and a precipitation reaction, which can be described by a time-dependent Freundlich equation. The maximum phosphate sorption capacity in the top 50 cm of the soil ranged from 3 to 6 t P2O5·ha-1. About 85% to 95% of the maximum amount of P bound was poorly soluble; the remaining portion of bound P determines the ortho-P concentration in soil solution under desorption conditions. The breakthrough curves of the two column experiments were described reasonably well by the proposed process description and the associated parameters, which were derived from batch experiments.

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