Inorganic Fertilizer Application and Its Effects on Microbial Population in Acid Soils
Grown with Khaya ivorensis in Central Cross River State, Nigeria
1Uzowulu, G.I, 2Ijomah, J.U, and 3Ovat, O.I
1 & 2Department of Forestry and Wildlife Management
Cross River University of Technology, Obubra Campus
3Department of Forestry and Wildlife Resources Management, University of Calabar, Calabar.
E-mail: iovatovat@yahoo.com

ABSTRACT

The study investigated the effects of inorganic fertilizers (Nitrogen and Copper) at different levels on the microbial numbers in acid soil grown with Khaya ivorensis in a green house experiment. Results show that the microbial numbers (fungi plus
bacteria) increased with N application up to 100ppm and Cu application up to 10ppm.The combined application of N and Cu led to the greatest microbial population. High application of N at 400ppm and Cu at 20 and 40ppm however
reduced the microbial population in the treated soil.