Effect of Organic and Mineral Fertilization on Some Soil Properties and Certain Nutrients Content of Corn (Sorghum Bicolor L)

To study the effect of organic and mineral fertilizers on some soil properties and nutrients content of corn. A greenhouse experiment was conducted in the winter season of 2013 at the Department of Soil and Environment - Faculty of Agriculture - University of Khartoum – Sudan. the treatments included  solid organic fertilizers (OS), organic liquid fertilizer (OL), urea (U), 0.50% composts solid + 50% urea (OSU), 0.50% composted organic liquid + 50% urea (OLU)  and control (C) without the addition of fertilizers with the exception of phosphate fertilizer. The results showed that urea application increase significantly soil nitrogen content up to 18.3%, also led to significant increase in P content of the soil, and available K, and significant increase in plant content of N, P, K and Na compared to control.
Composite application led to significant increase in soil organic matter, and a significant increase in plant content of P, K, Ca, Mg, Na compared to control. While adding organic liquid fertilizer led to a significant increase in soil organic matter up to 34%, and to a significant increase in the soil content of soluble Mg, and Na. and a significant increase in plant nitrogen content compared to the control. The addition of 50% of the fertilizer compost + 50% of urea fertilizer led to a significant increase in the soil content of total N, available P, soluble Ca, Mg, Na, and to a significant increase in E.C. and a significant increase in plant content of NPK and Na compared to the control.