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Pakistan Journal of Biological Sciences
Year: 1999  |  Volume: 2  |  Issue: 4  |  Page No.: 1507 - 1509

Recovery of Nitrogen Fertilizer and Growth of Cotton as Affected by Various Levels of Flooding

A. W. Soomro, A. R. Soomro and G. H. Mallah    

Abstract: A glasshouse experiment was carried out to evaluate the effect of temporary water logging on the growth and development of cotton and the recovery of nitrogen applied as urea fertilizer, with 3 water treatments i.e. control (W1), moderate flooding (W2), and severe flooding (W3). The studies concluded that flooding greatly reduced the growth characteristics of the cotton plant such as height, number of leaves, fruiting points and plant dry matter. Recovery of nitrogen applied as urea was significantly decreased with the increase in severity of flooding. Nitrogen losses during temporary flooding appears mainly to higher loss of nitrogen by denitrification, although other mechanisms may be significant. The wider implications of the results in terms of field practice with irrigated cotton are discussed.

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