Zinc Soil Test Calibration Based on 0.1 N HCl Extractable Zinc and Cation Exchange Capacity from Upland Soils of Northern Nigeria

N. Abdu, A. A. Yusuf, A. Abdulkadir, U. L. Arunah, V.O. Chude and S. G. Pam

Journal of Agronomy 6 ( 1 ): 179 - 182 , 2007