Field evaluation of biogas manure as a fertilizer for corn

ABSTRACT

A field experiment on corn [Zea mays L.] was conducted in silty clay soil to evaluate the effect of biogas manure on corn yield and nutrients uptake [N, P, K, Fe, Zn, Mn and Cu] in comparison with farmyard manure as well as regular NPK fertilizer. The application of biogas manure at rate of 20 ton/acre significantly increased seed yield and N, P, K, Fe, Zn, Mn and Cu uptake than did the 20 t farmyard manure or 10 t biogas manure. The fertilization with 20 t biogas manure/acre also significantly increased P, K, Fe and Mn uptake as compared with their uptake from the regular NPK treatment. No significant difference in seed yield was recorded between the NPK treatment and the 20 t biogas manure. The supplementation of 20 t biogas manure treatment with 45 kg N/acre significantly increased nutrients uptake and seed yield over the treatment with 20 t biogas manure alone