Response of Cowpea (Vigna unguiculata L. Walp) to Time of Application and Nitrogen Fertilizer on the Degraded Soil of Southern Guinea Savanna Zone of Nigeria
E. Ndor & U. D. Faringoro · Asian Soil Research Journal · 2020
Field trials were conducted during 2017 and 2018 rainy season, to investigate the effect of nitrogen fertilizer rates and time of application on the growth and yield of cowpea. The treatment consisted of three levels of urea: 0, 40, 80 kg N ha-1 and the times of fertilizer applic...
Open access
Research Article
10.9734/asrj/2020/v3i130066