Summary
Berseem (Trifolium alexandrinum L.) and oats (Avena satina 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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Published as no 2 in the series: Molybdenum accumulation in forage crops, by the same authors.
College of Agriculture and Radiation Soil Chemist, respectively.
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Pasricha, N.S., Nayyar, V.K., Randhawa, N.S. et al. Influence of sulphur fertilization on suppression of molybdenum uptake by berseem (Trifolium alexandrinum L.) and oats (Avena sativa L.) grown on a molybdenumtoxic soil. Plant Soil 46, 245–250 (1977). https://doi.org/10.1007/BF00693130
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DOI: https://doi.org/10.1007/BF00693130