February 2009
Hydrologic properties of grazed perennial swards in semiarid southeastern Kenya
Identification of plant resources that persist under grazing pressure, support desirable levels of production and at the same time protect the grazing environment is central to sustainable livestock production. This study assessed the infiltration capacity and soil loss associated with perennial swards subjected to different levels of utilization using simulated rainfall. The hypothesis was tested that grazed...
February 2009
Improving soil productivity through biochar amendments to soils
Biochar based soil management has not being fully exploited in the tropics. In a greenhouse study, two soil types (sandy loam and silt loam soils) and 6 treatments namely: 3t ha-l Biochar, 120 kg N ha-1, 120 kg N ha-1 + 3t ha-1biochar, 4t C ha-1 cattle manure, 4t C ha-1 cattle manure + 3t ha-1 biochar and control un-amended soil were evaluated for soil productivity. The treatments...
February 2009
Copper, selenium and zinc content of canned and non-canned beverages in Nigeria
The levels of copper, selenium and zinc in beverages purchased in Nigeria were studied. Fifty samples of these beverages were digested in nitric acid and were analyzed using the Atomic Absorption Spectrophotometer (AAS). The zinc levels ranged from 0.0 - 1.34 mg/L for the canned and 0.01 - 1.11 mg/L for the non-canned beverages. All had zinc levels below the maximum contaminant level (MCL) of 5.0 mg/l set by...
February 2009
Effects of Soy-based allochthonous nutrient inputs on intensively cultured female Clarias gariepinus (Burchell) brooder’s growth performance and on the in-dwelling net microplanktonic populations
Portions of soybean meal autoclaved at 116°C and 1.2 kg/cm2 pressure for 10, 15, 20, 25 and 30 min were used to compound 4 experimental diets appropriately labeled SB10, SB15, SB20, SB25 and SB30 respectively. The experimental diets were fed...
February 2009
Electronic Waste and the African Environment
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