BYPASS FLOW NITROGEN LOSSES IN VERTISOLS IN TROPICAL ENVIRONMENTS - ONYANGO, CHARLES
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Bypass flow is one of the main avenues of fertilizer nitrogen (N) loss in agricultural fields. The magnitude of fertilizer N carried in bypass flow is influenced by soil characteristics, nitrogen species (i.e., NH4+ or NO3-) and rainfall patterns, inter alia. Wetting the soil prior to fertilizer application resulted in significantly (p ammonium sulphate calcium nitrate, while the effect of N sources on nitrate-N were in the order calcium nitrate urea = ammonium sulphate. The increase in nitrate-N in the effluent due to fertilizer rate were in the order 200 100 50 kg N ha-1. Ammonium- N losses…mehr

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Produktbeschreibung
Bypass flow is one of the main avenues of fertilizer nitrogen (N) loss in agricultural fields. The magnitude of fertilizer N carried in bypass flow is influenced by soil characteristics, nitrogen species (i.e., NH4+ or NO3-) and rainfall patterns, inter alia. Wetting the soil prior to fertilizer application resulted in significantly (p ammonium sulphate calcium nitrate, while the effect of N sources on nitrate-N were in the order calcium nitrate urea = ammonium sulphate. The increase in nitrate-N in the effluent due to fertilizer rate were in the order 200 100 50 kg N ha-1. Ammonium- N losses were low being in the range 0.1 to 1 %, while nitrate-N losses were high, being in the range 0.02 to 21 % of the applied fertilizer.
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Autorenporträt
NAME: CHARLES ONYANGO OWINO NATIONALITY:KENYAN DATE OF BIRTH:18th APRIL 1974 MARRITAL STATUS:MARRIED LANGUAGE:ENGLISH & KISWAHILI(ORAL & WRITTEN) EDUCATION: MSc (SOIL SCIENCE), BSc (AGRIC) Current contact:Box 249-30200 KITALE. E-mail: onyangochrls @yahoo.com, cowino@kephis.org Career Interest:Agricultural research (Soil and plant options)