Biuret toxicity in Arabica coffee
Effect of foliar sprays and soil applications of urea containing different concentrations of biuret was studied using 15 month old Coffea arabica cv Kents seedlings. This was compared with foliar sprays and soil applications of pure biuret and available samples of urea. Foliar applications of urea containing biuret at 2.5 per cent and above and soil applications of urea with 10 per cent biuret and above resulted in biuret toxicity. The symptoms of toxicity and the sequence of its development have been described. While for foliar sprays, coffee was found to be tolerant to biuret contents of upto about 2 per cent in urea, that four soil applications an accumulation of about 1.5 g of biuret in the soil appeared critical. The present study showed coffee to be more sensitive to biuret toxicity than citrus, tea and some vegetable crops
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1976
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| Subjects: | COFFEA ARABICA, APLICACION FOLIAR, FITOTOXICIDAD, KENTS, FERTILIZACION, BIURET, |
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