Suitability Evaluation of Selected Wetland Soils in Nigeriafor Rainfed Rice Cultivation uri icon

abstract

  • Thirty-eight wetland soils in four agro-ecologicalzones were evaluated for their suitability for rice(Oryza sativa L.) cultivation. The results indicated thatclimatic characteristics are near optimum. Currently,by non-parametric method, most (? 97%) of thepedons were found to be marginally suitable (S3).With the parametric method about 3% were highlysuitable (S1), 74% marginally suitable (S3) and 23%not suitable (NS). Potentially by non-parametricmethod, 18% were of high (S1) and moderate (S2)suitabilities respectively, 58% were marginally suitable(S3) and 6% not suitable (NS). With parametricmethod, 24% were highly suitable (S1), 45 and 31%were of moderate (S2) and marginal (S3) suitabilities.The major limitations to rice cultivation on these soilsare low CEC, organic carbon, exchangeable cationsand available P, which may predispose rice plants toexcessive Fe2+ uptake visually expressed as «bronzing» or «yellowing» symptoms. In this and similarenvironments in the region, good soil management isrequired before substantial improvement in rice productioncan be achieved

publication date

  • 2002