Mapping and Sustainable Land Use of Upland Soils in Southern Guinea Savanna Environ of Niger State, Nigeria
Keywords:
Entisols, Ferrugination, Lessivage, Ultisols, Soil mappingAbstract
Soil survey and land evaluation is very important in agricultural planning especially in crop production. The upland soils formed from sandstone and quartz schists in Katcha Local Government Area of Niger State were mapped for sustainable land use and management. Representative sites were selected based on digital terrain model (DTM) and ancillary information. Final mapping was done by spatial interpolation in GIS environ. The results show that the controlling factors of soil formation include climate, relief and parent material. The major soil forming processes observed include lessivage, leaching, illuviation, ferrolysis, eluviation and ferrugination. The upland were classified as Arenic Hapludult, Rhodic Hapludult, Typic Plinthudult, Pellic Dystrochrept and Rhodic Udipsamment while Aquic Udipsamment was identified at lower to valley bottom. Sustainable soil use and management require minimum tillage, cover crop cultivation, and use of fortified organic manure/compost for structural stability of soil and optimum crop yields.