Abstract
SUMMARYIn a glasshouse experiment, sulphur was applied to 22 soils as 35S-labelled gypsum. Estimates of available sulphur using different extractants were correlated with yield responses and sulphur uptakes by oats. The largest correlation coefficients were obtained with ‘A’ values and sulphur soluble in 0·5 M-NaHC03, 1% NaCl after heating and ammonium acetate–acetic acid. Critical levels of available sulphur obtained by relating these four methods to yield responses were 24·0, 22·0, 11·0 and 10·5 mgS/kg soil respectively.
Publisher
Cambridge University Press (CUP)
Subject
Genetics,Agronomy and Crop Science,Animal Science and Zoology
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