Kwara State University
Khadijat Alabi
Designation: Dr (Mrs)
Department: Crop Production
| My Publications | ||||||||
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| S/N | Title | Abstract | Authors | Volume Numbers | Publication Type | Publication Date | Link | |
| 1 | Evaluation of soils of a toposequence at Odeda, Ogun State, for rice (Oryza Sativa L.) production |
A study of upper to lower slope of a toposequence at Odeda, Ogun State was conducted to characterize, classify and assess the suitability f the soils for production of rice. Soil series of Smyth and Montgomery was adopted while the linear parametric and square root models were used for assessing the suitability of the land for rice production. A 2 x 2 x 2 factorial trial was used to evaluate the performance of rice under different management and fertilizer regimes within each soil series. The factors considered were two rice varieties (Ofada and NERICA 1), two types of fertilizers ((N: P: K: 20: 10: 10 at 400 kg ha-I and manure at lOt ha-I with herbicide as control) and two different management methods (the traditional and improved agronomic methods). The soils were loamy sand to sandy clay loam texture, fine to coarse sub-angular blocky structure and loose to hard consistency. All the soils had redoximorphic properties with varying quantities of iron-manganese concretions (0.25 % - 34.39 %) in the sub soils. The soil reaction ranged from slightly acidic to mildly alkaline (pH of 5.3-6.8) with low organic carbon 1.6 %) and total nitrogen (0.02% - 0.06%) contents. The soils had low CEC (6.18- 15.57 cmol kg-I), low available phosphorus (0.40-1.86 mg g-I) and micro-nutrients (0.07-0.13g kg-I). Ap.art from exchangeable potassium (2.6-11.25 cmol kg-I) all other exchangeable bases were low. Pedon 1 (upper slope) was classified as Typic Hapludalf (Lixisol), pedon 2 (middle slope) as Plinthic Kandiudalf (Lixisol) and pedon 3 (lower slope) as Aeric Endoaq ept (Cambisol). All the pedons were classified as currently not suitable (Nl) for both upland and lowland rice production because of the index of current productivity (IPc) that ranged between 1.13 and 5.32. This resulted from low levels of available macro and, micro-nutrients, organic matter content and location exchange capacity. Evaluation of potential suitability using the linear model indicated pedon I as highly suitab | 11. Ajiboye, G.A, Alabi, K.O; Aiboni, V.U; Okeleye, K.A. and Adesodun, J.K | 21(2) | Nigeria journal of the soil science | 2011-09-06 | ||