Salisu, S. G. ., M. R. . Hassan, H. Y. . Adamu, A. . Musa, S. A. . Ahmed, U. . Abdullahi, S. J. . Umar, M. . Abdulsalam, M. A. . Haruna, and S. A. . Abubakar. “Effect of NPK (20:10:10) Fertilizer Rates and Age of Harvest on Forage Yield and Quality of Two Maize (Zea Mays L) Varieties in Northern Guinea Savannah”. Nigerian Journal of Animal Production, vol. 53, no. 2, Aug. 2026, pp. 1-10, doi:10.51791/njap.v53i2.9191.