Spatial Capability Classification and Land Evaluation Studies for Rice Production on Selected Wetland Soils in Ekiti State, Nigeria.

Abstract:

The evaluation of wetland soils is essential for understanding their suitability for various agricultural practices, particularly in regions where soil properties significantly influence land management decisions. This study focuses on the spatial capability classification and land evaluation of selected wetland soils in Ekiti State, Nigeria, with a particular emphasis on rice production. Wetland soils in this region are characterized by distinct physical and chemical properties that affect their agricultural potential. The use of both parametric and non-parametric approaches in land suitability assessment allowed for a comprehensive analysis of the land's potential, factoring in both inherent soil qualities and the potential for improvement through human intervention. The research utilized a combination of Land Capability Classification (LCC) and Land Suitability Classification (LSC) methods to assess soil characteristics such as texture, organic matter content, drainage capacity, and nutrient availability. These evaluations were further supported by the Geographic Information System (GIS) and remote sensing technologies, which provided spatial data and generated suitability maps. The results indicate a range of soil suitability classes, from highly suitable (Class I) to unsuitable (Class VIII) for rice cultivation. Although, the drainage condition which is essential for effective water management indicated moderate suitability (S2) in all the locations. Notably, sites such as Ise, Isan, and Ikole demonstrated highly suitable conditions (S1) for rice production, characterized by optimal soil textures. In contrast, Ifaki exhibited marginal suitability (S3) due to lower pH levels and cation exchange capacity (CEC), highlighting potential challenges in nutrient retention that could adversely impact crop yield. The results of this study offer valuable insights for land use planning and agricultural development, contributing to sustainable land management practices and mitigating erosion risks, especially in regions identified as having moderate to severe erosion hazards and also enhanced food security in the region. Additionally, it emphasizes the need for continuous soil assessments to monitor changes in soil properties and adapt agricultural strategies accordingly.