Influence of acacia senegal, A. seyal and A. tortilis on some properties of sandy soil in North Kordofan State, Sudan
2004
El-Tahir, B.A. | El-Hag, F.M. (Agricultural Research Corporation (ARC), El Obeid Agricultural Research Station, El Obeid (Sudan))Madibo, G.M. (Agricultural Research Corporation (ARC), Shambat, Khartoum North (Sudan))El-Wakeel, A.S. (The High Council for Environment and Natural Resources, Khartoum (Sudan))
The study was conducted at El Obeid Agricultural Research Station, North Kordofan State, to investigate the effects of Acacia senegal, Acacia seyal and Acacia tortilis on some chemical properties and particle size distribution of sandy soil after three years from planting. The results showed that the tree species had significant effects on all studied soil properties, while time of sampling and distances from tree base had significant effects on soil chemical properties and particle-size distribution. The percentage of P was significantly higher under the trees than in bare soil.Among the tree species, P was much higher under A. senegal and A. tortilis, whereas organic carbon was significantly higher under A. tortilis and A. seyal. Both A. tortilis and A. seyal added litter with higher C/N ratio than A. senegal. A. tortilis had 38% greater C/N ratio than A. seyal. Regarding the sampling time, the values of C%, C/N ratio and pH increased significantly during the wet periods, while those of CEC decreased. Values of N and C significantly decreased with increasing distance from tree base. The results also showed that there were higher silt and clay contents under trees than in bare soil. Silt content was high during the wet periods under the three species, while clay content was high under A. senegal during the dry periods. Clay content increased with increasing distance from tree base
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