The effects of biosolid application on soil chemical properties and Zea mays nutrition

Background: The application of biosolid as a fertilizer in agricultural cultivation is a common practice in many countries. This study investigates the effects of sewage sludge and compost usage on soil chemical properties and Zea mays nutrition in comparison with those of iron and manganese sulfate solution. The experiment was carried out in a completely randomized block design with the following treatments: sewage sludge and compost with three levels (0, 25 and 50 t ha−1) and iron and manganese sulfate solution (1 g l−1 solution) with three replications. Results: The application of sewage sludge (50 t ha−1) had highly significant (P