Effect of Continuous Use of Fertilizers, Lime and Micronutrients on Soil Properties at Mokwa, Nigeria

In a long-term fertility study at Mokwc, Nigeria, it was observed that use of fertilizers alone maintained optimum levels of soil pH, total nitrogen, organic carbon, C/N ratio, cation exchange capacity and exchangeable cation. Lime application increased the exchangeable calcium content significantly in the soil whereas Mg content remained almost unchanged. Exchangeable K content was significantly higher under continuous use of potassic fertilizer. Maize, cotton and sorghum responded significantly to nitrogen application. Potassium response was significant with maize and cotton only. Cotton responded very well to boron application.