Effects of Poultry Manure on Soil Fertility, Growth and Yield of White Yam and Yellow Yam. uofkjas [انترنت]. 28 مارس، 2023 [وثق 25 مايو، 2026];20(3). موجود في: https://onlinejournals.uofk.edu/uofkjas/article/view/1858