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Influence of sulphur fertilization on suppression of molybdenum uptake by berseem (Trifolium alexandrinum L.) and oats (Avena sativa L.) grown on a molybdenum-toxic soil

N. S. Pasricha, V. K. Nayyar, N. S. Randhawa and M. K. Sinha
Plant and Soil
Vol. 46, No. 1 (JANUARY 1977), pp. 245-250
Published by: Springer
Stable URL: http://www.jstor.org/stable/42933417
Page Count: 6
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Influence of sulphur fertilization on suppression of molybdenum uptake by berseem (Trifolium alexandrinum L.) and oats (Avena sativa L.) grown on a molybdenum-toxic soil
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Abstract

Berseem (Trifolium alexandrinum L.) and oats (Avena sativa L.) were grown in a greenhouse on a soil with a toxic level of available molybdenum. Significant increase in yield of berseem was observed on application of phosphorus and sulphur. The oat crop responded only to P application. The content of Mo in plants was enhanced by application of phosphorus. The application of sulphur depressed the Mo content of plants. The effect of P application was more conspicuous than the depressing effect of S application on Mo content of plants. The decrease in Mo content with S application was more pronounced in the oat crop. An application of 100 ppm S as gypsum caused 57.6 per cent decrease in the concentration of Mo which was below the threshhold toxic level. But in berseem, an application of 100 ppm S even could not lower the Mo concentration to a safer level. Gypsum and superphosphate were equally effective in lowering the concentration of Mo in berseem.

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