Soil Morphological Properties, Classification, Suitability and Capability Classification on Dabora- Yelwa Toposequence, Adamawa State, Northeastern Nigeria

摘要

This study was conducted to assess soil morphological properties, soil classification, suitability and capability classification on Dabora-Yelwa toposequence with the view of improving soil management practices and increase the productive capacity of the farmers of the study area. Soil sampling units were delineated using GIS and the study area was categorized into 3 different slope positions on the toposequence and each slope position was recognized as a sampling unit. Two soil types were identified and classified into Typic Plinthustalfs (Yelwa and Sangba’a respectively) and Psammentic Paleudalfs (Dabora). Generally, structural development increased along the slope from upper slope to the bottom slope position. Capability classification resulted in the upper slope: as C3 (IIIse) with limitations in texture and erosion hazards while the soils at the lower slope resulted in class C2 (IIsw). Suitability classification indicated that these soils were moderately suitable for sorghum at the upper slope while maize was marginally suitable with limitation in drainage. Measures such as land leveling, afforestation and use of cover crops will reduce the effect of erosion at the upper slope position.