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Effect of modifications of the P‐Bray no. 1 method on soil test results
Author(s) -
Drechsel Pay,
Mutwewingabo Bernard,
Hagedorn Frank
Publication year - 1996
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.1996.3581590416
Subject(s) - sieve (category theory) , soil test , extraction (chemistry) , phosphorus , sieve analysis , mathematics , soil science , environmental science , mineralogy , chemistry , soil water , geology , chromatography , geotechnical engineering , combinatorics , organic chemistry
The importance of typical modifications of the Bray no. 1 procedure for the determination of “available” soil phosphorus was assessed using soil samples from Rwanda. Variations in shaking time (1 or 5 min.), soil to extraction solution ratio (1:7 or 1:10), and soil sieve size (2 mm vs. 0.5 mm) were found to significantly affect available P values. The modifications gave values which were up to 75 % higher than those of the original Bray no. 1 procedure.