University of Khartoum

Effect of Soil Tillageon Potentially Mineralizable Nitrogen

Effect of Soil Tillageon Potentially Mineralizable Nitrogen

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Title: Effect of Soil Tillageon Potentially Mineralizable Nitrogen
Author: Abdelseed, Mawahib Musa Ahmed
Abstract: This study was conducted to monitor the effect of tillage on potentially mineralizable nitrogen during the growing season. Two sites were selected in Sinnar State during the autumn season (August-October 2005). The first site was in Wad-Hashem South east Sinnar, which is usually, cultivated using sub-soiler, smoothing by disk harrowing, leveling, and ridging, representing conventional tillage. The second site was in eastern Sinnar representing traditionally cultivated by hoe and sowing stick (Hashashah and Saloka cultivation).Samples were usually taken every two weeks during the season (0, 2, 4, 6, 8 and 10 weeks) from 0-30 and 30-60 cm soil depths. Results showed that the content of total mineral nitrogen (NH+4-N+NO-3-N) determine in traditional tillage of all sampling weeks was significantly (P =603; 0.005-0.02) higher than that obtained under conventional tillage. Content of total mineral nitrogen of traditional tillage (NH+4-N+NO-3-N) determine after the 2, 4, 6, 8, and 10 weeks were 366.2, 217.78, 206.12, 202.86, 189.8kg/ha, respectively. Respective values for conventional tillage were 139.01, 160.34, 166.13, 177.18, 212.08kg/ha, respectively. These results indicated that tillage enhanced mineralization of soil organic matter observed during the season. However, conventional tillage it is always lower than that of traditional tillage where crop residues are more and with less soil disturbance therefore, this tillage system is characterized by fewer chances of leashing of (NO3). It could be concluded that conventional tillage practices decrease the content of mineral nitrogen in the soil profile compared to traditional tillage.
URI: http://khartoumspace.uofk.edu/handle/123456789/11935
Date: 2015-06-14


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