Response of Sorghum bicolor L. to Residual Phosphate on Two Contrasting Soils Previously Planted to Cowpea or Maize
Table 4
Effects of soil characteristics and previous crop on fresh and dry shoot weight (g/pot) and relative yield (%) of sorghum in the second cropping.
Treatment
Fresh shoot weight (g/pot)
Relative yield (%)
Dry shoot weight (g/pot)
Relative yield (%)
Soil characteristics
Strongly acidic sandy clay loam
10.98
67.16
1.57
75.12
Slightly acidic loamy sand
16.35
100.00
2.09
100.00
LSD (5%)
0.94
0.16
Crop effect on succeeding sorghum
Cowpea-sorghum
14.19
100.00
2.13
100.00
Maize-sorghum
13.14
92.60
1.52
71.36
LSD (5%)
0.94
0.16
Previous crop soil
Cowpea strongly acidic soil
11.47
67.79
1.73
68.38
Cowpea slightly acidic soil
16.92
100.00
2.53
100.00
Maize strongly acidic soil
10.50
62.06
1.41
55.73
Maize slightly acidic soil
15.79
93.32
1.64
64.82
LSD (5%)
NS
0.22
P0: control, MRP: Morocco rock phosphate, SRP: Sokoto rock phosphate, SSP: single superphosphate, NS: not significant (), and relative yield (RY) = (Yield of crop on a particular soil )/(Maximum yield) × 100%.
