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https://hdl.handle.net/2440/87186
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Type: | Journal article |
Title: | Critical limit of extractable phosphorous in a gleysol for rice production in the Senegal River Valley of West Africa |
Author: | Bado, B. De Vries, M. Haefele, S. Marco, M. Ndiaye, M. |
Citation: | Communications in Soil Science and Plant Analysis, 2007; 39(1-2):202-206 |
Publisher: | Taylor & Francis |
Issue Date: | 2007 |
ISSN: | 0010-3624 1532-2416 |
Statement of Responsibility: | B. V. Bado, M. E. De Vries, S. M. Haefele, M. C. S. Marco, and M. K. Ndiaye |
Abstract: | Soil‐test correlation and calibration, a useful tool for fertilizer recommendations, has been little used in West Africa. Soils from a long‐term fertility experiment have been used to study the relationship between rice yields and soil extractable phosphorus (P) with Bray 1 and Olsen methods. The Cate and Nelson graphical method was used for critical limits of soil P determination. The critical limits of soil extractable P at 95% relative grain yield were 9 mg P for the Bray 1P and 17 mg P kg−1 for Olsen P. The Olsen P was more correlated (r=0.63) with rice grain yields than Bray P (r=0.50), but a strong correlation (r=0.92) was also observed between the values of the two methods. Results indicate that at levels less than these critical levels of extractable P, P fertilizers should be applied to increase rice yields. |
Keywords: | Critical level; fertilizer; phosphorous; rice; soil |
Description: | Published online: 31 Mar 2008. For Erratum see Communications in Soil Science and Plant Analysis, 2008;39(3-4):626-626 |
Rights: | Copyright © Taylor & Francis Group, LLC |
DOI: | 10.1080/00103620701759178 |
Published version: | http://dx.doi.org/10.1080/00103620701759178 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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