Demand-Driven Technologies for Sustainable Maize ... - IITA

148Table 6. Rotation† and fertilizer effects on exchangeable Ca and exchangeable Mg of 0-15 cm of a Typic Haplustalf.Fertilizer (kg N ha -1 ) cmol ccRotation RotationMS1 MS2 MF MM Mean MS1 MS2 MF MM Mean------------Exchangeable Ca, kg -1 ----------- -----------Exchangeable Mg, cmol kg -1 -------------0 1.18 1.57 1.39 1.15 1.32 0.32 0.41 0.22 0.25 0.3090 2.80 3.19 1.93 1.74 2.42 0.41 0.54 0.28 0.37 0.40Mean 1.99 2.38 1.66 1.45 0.37 0.45 0.25 0.31LSD (0.01)Rotation (R) 0.44 0.05Fertilizer (F) 0.36 0.04R x F 0.71 0.08† MS1 = TGx 1448-2E-Maize; MS2 = Samsoy-2-Maize; MF = Fallow-Maize; MM = Continuous maizeTable 7. Rotation† and fertilizer effects on exchangeable K and exchangeable acidity of 0-15 cm of a Typic Haplustalf.Fertilizer (kg N ha -1 ) cc-1 Rotation RotationMS1 MS2 MF MM Mean MS1 MS2 MF MM Mean------------Exchangeable K, cmol kg -1 ------------ ----------Exchangeable acidity, cmol kg -1 --------0 0.37 0.31 0.27 0.20 0.29 0.09 0.09 0.09 0.06 0.0890 0.36 0.36 0.35 0.35 0.36 0.15 0.13 0.05 0.09 0.11Mean 0.37 0.34 0.31 0.28 0.12 0.11 0.07 0.08LSD (0.01)Rotation (R) 0.06 0.07Fertilizer (F) 0.06 0.09R x F 0.12 0.19† MS1 = TGx 1448-2E-Maize; MS2 = Samsoy-2-Maize; MF = Fallow-Maize; MM = Continuous maize