Effect of Land Degradation on Maize Yield in Obudu Local Government Area, Cross River State, Nigeria
This study analysed the effects of land Degradation on maize yield in Obudu Local Government Area (LGA) of Cross River State. The study adopted the use of primary data and the instrument of data collection was a structured questionnaire administered on100 and 60 respondents for maize farmers in degraded and non-degraded lands respectively. The methods of data analysis used were both descriptive and inferential statistics. Descriptive statistics results on socio-economic characteristics shows that majority (67.0%) of the maize farmers were males, married (86.0%) and had mean age of 43.6years. Result on land degradation types revealed erosion (2.27), flooding (2.11) and desertification (2.02) as most common types of land degradation experienced by maize farmers in the study area. Over-grazing (35.0%) and poor farming method (35.0%) were the major causes of land degradation. Independent sample t-test statistic result comparing maize yield of degraded and non-degraded lands indicated a t-calculated value of 13.100 at 0.05 level of significance, implying significant difference in maize output between degraded and non-degraded lands in the study area. The OLS multiple regression model result with linear functional form as best fit equation of factors affecting output of maize, revealed coefficient of multiple determination (R squared) value of 0.840 which is an indication that 84.0% of the variation in maize output cultivated on degraded lands is explained by explanatory variables included in the regression model viz: cost of fertilizer (-0.002) and cost of seed (-0.006), all significant at 5% confidence level. The value of F-statistic (27.535) was significant at 1% significance level which explains that the explanatory variables jointly had effect on maize yield, therefore the null hypothesis was rejected and the alternate hypothesis accepted. The study recommended subsidization of fertilizer and seed cost for sustainability/better yield in maize production.
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