Research Article
Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results
Table 2
Soil characteristics at the three trial sites in Soroti and Kumi districts, Uganda.
| Soil parameter | Unit | Trial site | NaSARRI, Serere, Soroti district | Kikota village, Soroti district | Kogili village, Kumi district |
| pH | ā | 5.8 | 6.0 | 5.9 | Sand | % | 47 | 60 | 68 | Clay | % | 20 | 18 | 25 | Silt | % | 33 | 22 | 7 | Organic matter | % | 2.38 | 3.26 | 1.59 | Nitrogen | % | 0.18 | 0.11 | 0.09 | Phosphorous (Bray 1) | mg/kg | 2.45 | 5.72 | 2.85 | Calcium | cmoles/kg | 5.4 | 5.7 | 3.0 | Magnesium | cmoles/kg | 1.19 | 1.84 | 1.33 | Potassium | cmoles/kg | 0.29 | 0.37 | 0.34 | Sodium | cmoles/kg | 0.07 | 0.08 | 0.07 | Copper | mg/kg | 2.84 | 5.04 | 2.10 | Iron | mg/kg | 211.7 | 221.1 | 264.3 | Zinc | mg/kg | 1.20 | 1.74 | 1.74 | Manganese | mg/kg | 37.2 | 35.9 | 52.7 |
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Source: soil, water, and plant analytical laboratory, Department of Soil Science, Makerere University, Kampala, Uganda.
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