NITROGEN MINERALIZAT ION POTENTIAL Or NEEM (AZADIHACHTA INDICA A. JUSS) SEED CAKE AND ITS UTILIZATION IN SAVANNA SOIL

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dc.contributor.authorIDRIS, SULAIMAN OLA
dc.date.accessioned2014-02-07T09:40:04Z
dc.date.available2014-02-07T09:40:04Z
dc.date.issued1997-11
dc.descriptionA THESIS SUBMITTED TO THE POST GRADUATE SCHOOL AHMAD J BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF MASTER OF SCIENCE DEGREE IX ANALYTICAL CHEMISTRY DEPARTMENT OF CHEMISTRY FACULTY OF SCIENCE Al IMADU BELLO UNIVERSITY. ZARIA, NIGERIA NOVEMBER,en_US
dc.description.abstractABST RACT Laboratory incubation studies were earned out on a mixture of neem seed cake (2g) and soil (lOOg) to assess the N mineralizable potential of ncetn seed cake. Moisture content of the mixture was maintained by periodic addition of distilled water and the mixture was incubated at laboratory temperature for 14 weeks. During this time, KC1 extracts of the soil/nccm seed cake mixture were periodically analysed lor KI I,' - N and No3 - N. The pH of the extracts were also determined. Simple first order and modified first order E rate equations were fitted to the data obtained to quantify the potentially mineralizable N. Statistical treatment indicated that the modified first order E model gave a better fit than the classical first order model. From the calculated half lives, simple first order and modified first order E equations indicated that neem seed cake could be added to soil at 4V2 and 6 weeks respectively alter planting (for a maize that tassels at the 8th week of planting). This would ensure that hall ol the potentially mineralizable N would be available for the maize utilization. Trvee cropping sessions of 6 weeks each were conducted in green house studies. At the end of every cropping, the shoot dry matter yield (SDMY), root dry matter yield (RDMY), nitrogen uptake of shoot (NS), nitrogen uptake of root (NR). and soil pH were determined. Soil available P was also determined at the end of first cropping. The response to the application of neem seed eake in the trials as reflected in SDMY, RDMY, NS and NR indicated significant difference from the control experiment. Urea fertilizer and its interaction with the neem seed eake increased the dry matter yield and N uptake as compared to control. The interactive effect of neem seed eake and urea gave better response when 80kgN ha of urea were applied than when 40kgN ha of urea were used as reflected in dry matter yield and N uptake. All the soil amendments increased soil acidity relative to control experiment. All the plants exhibited V deficiency symptoms at lirst cropping.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/596
dc.language.isoenen_US
dc.subjectNITROGENen_US
dc.subjectMINERALIZAT IONen_US
dc.subjectPOTENTIALen_US
dc.subjectNEEMen_US
dc.subjectAZADIHACHTAen_US
dc.subjectINDICA A. JUSSen_US
dc.subjectSEEDen_US
dc.subjectCAKEen_US
dc.subjectUTILIZATIONen_US
dc.subjectSAVANNAen_US
dc.subjectSOILen_US
dc.titleNITROGEN MINERALIZAT ION POTENTIAL Or NEEM (AZADIHACHTA INDICA A. JUSS) SEED CAKE AND ITS UTILIZATION IN SAVANNA SOILen_US
dc.typeThesisen_US
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