Characterization, evaluation and suitability of selected soils of Gboko-South for Yam and Cassava production

Jacob Usman, O. J. Ogbu, R. A.R. Ejembi


This study characterized and evaluated soil fertility status of soils of Gboko-South in Gboko Local Government Area of Benue State and their suitability for cassava and yam production. The extent of the study site is about 400ha of land. Auger point investigations were carried out at 100m intervals along traverses spaced at 100m apart. Three soil units were identified on the field based on soil colour, structure, textures, surface characteristics and topography. All the soil units were deep (102 – 141cm) and well drained except unit I that was poorly drained. The soils were coarse-textured and slightly to moderately acidic in reaction (pH 5.38 – 6.50). They had low organic matter contents ranging from 0.20% to 0.95% and high base saturation of 76% to 86%. Based on the physical and chemical characteristics, the soils were classified as Typic Epiaqualfs/Epigleyic Stagnosols, Arenic Haplustalfs/Eutric Luvisols, and Eutric Haplustept/ Eutric Haplic Luvisols. In terms of suitability evaluation, the qualities of the soil units were compared with the requirements of cassava and yam. Soil unit I (pedon I and II) were limited by drainage and nutrient and therefore grouped as S2-n which implies moderately suitable for cassava and yam. Soils of unit II (pedon III and IV) were gravely and limited in depth by lateritic ironstone and also nutrient. It was therefore grouped as S2-k,n meaning the soils were moderately suitable for cassava and yam due to stoniness. Soil unit III (pedon V and VI) were limited by low (0.20 – 0.95%) nutrients and therefore grouped as S2-n. This implies moderately suitable for cassava and yam production.

Full Text:




  • There are currently no refbacks.