eprintid: 4000
rev_number: 8
eprint_status: archive
userid: 30
dir: disk0/00/00/40/00
datestamp: 2011-11-16 14:17:47
lastmod: 2011-11-16 14:17:47
status_changed: 2011-11-16 14:17:47
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
item_issues_count: 0
creators_name: Abekoe, M K
creators_name: Sahrawat, K L
icrisatcreators_name: Sahrawat, K L
affiliation: University of Ghana(Legon)
affiliation: WARDA(Bouake)
country: Ghana
country: Ivory Coast
title: Phosphate retention and extractability in soils of the humid zone in West Africa
ispublished: pub
subjects: s2.11
subjects: s2.5
full_text_status: restricted
keywords: Phosphorus; Adsorption; Desorption; Extractability of P; Soils; Humid zone


note: M.K. Abekoe thanks the West Africa Rice Development Association
ŽWARDA.for the award of a Visiting Scientist fellowship and support of the
study. The help offered by the technical staff of the Soil Science Division of
WARDA in the course of the analytical work is very much appreciated
abstract: Phosphate adsorption and desorption studies provide insight for developing P management strategies. Very few studies have concentrated on P desorption which provides information on the reversibility of adsorbed P. Phosphate adsorption and desorption studies were carried out on seven rice-growing soils from three countries in West Africa, with the objective of relating these processes to P management strategies for the soils. The standard P requirement (SPR) of soils, defined as the amount of P to be added to attain an equilibrium solution concentration of 0.2 mg P l−1, varied from 42 to 175 mg P kg−1. Out of the seven soils, four required low amounts and the other three needed relatively higher P applications. The extractability of the adsorbed P in different extractants was: 0.01 M KCl 32–78%, Olsen P 21–112%, and Bray 1 P 15–40%. Differences in the amounts of P desorbed by the soils suggested that the critical P levels needed for P management must be different. Management options to increase P availability in the soils are suggested.


date: 2001
date_type: published
publication: Geoderma
volume: 102
number: 1-2
publisher: Elsevier
pagerange: 175-187
refereed: TRUE
issn: 0016-7061
official_url: http://dx.doi.org/10.1016/S0016-7061(00)00110-5 
related_url_url: http://scholar.google.co.in/scholar?hl=en&q=allintitle%3A+%22Phosphate+retention+and+extractability+in+soils+of+the+humid+zone+in+West+Africa%22&btnG=Search&as_sdt=0%2C5&as_ylo=&as_vis=0
related_url_type: author
citation:   Abekoe, M K and Sahrawat, K L  (2001) Phosphate retention and extractability in soils of the humid zone in West Africa.  Geoderma, 102 (1-2).  pp. 175-187.  ISSN 0016-7061     
document_url: http://oar.icrisat.org/4000/1/Geoderma_102_1-2_2001_175%E2%80%93187.pdf