1. found that with different fertilizers applied, a significant increase of F. graminearum was observed with increasing N input. Maize following a legume generally gave lower densities of F. oxysporum. Craven and Nel (2017) reported higher densities of F. oxysporum in the roots of continuous maize than in maize rotated with cowpea. However, Hugo (1995) observed that F. oxysporum occurred more in the wetter season in both continuous maize and maize rotated with groundnuts and soybean. F. oxysporum is known as "rhizosphere competent" because it grows saprophytically and reproduces in the rhizosphere, causing root rot leading to moisture stress (Young and Kucharek;F Rao;F. oxysporum was not affected by fertilization in this study. However, some References Abbas,1964
2. Farmers' agronomic and social evaluation of productivity, yield and N 2 -fixation in different cowpea varieties and their subsequent residual N effects on a succeeding maize crop;S Adjei-Nsiah;Nutr. Cycling Agroecosyst,2008
3. Maize in Sub-Saharan Africa: Importance and production constraints;B Badu-Apraku;Advances in Genetic Enhancement of Early and Extra-early Maize for Sub-Saharan Africa,2017