Theses and Dissertations

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Browsing Theses and Dissertations by Author "Odeyemi, Olu"

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    Field Assessment of Some Local Cowpea Rhizobium Inoculants.
    (Obafemi Awolowo University, 1986) Oloke, Julius Kola; Odeyemi, Olu
    The effectiveness of lignite, sub-bituminous, cow manure and peat as rhizobia carriers and inoculants were assessed in a field plot. The inoculants prepared by incorporating each of three rhizobia strains (IFE CR9, IFE CR15 and R. japonicum) into each of the carrier materials were used to inoculate three cowpea varieties viz. TVU 1190, IT82E-60 and Ife brown. When lignite bearing IFE CR9 was used to inoculate TVU 1190 plants, the nitrogen content of the plants was found to be 178.12mg/plant whereas that of the uninoculated nitrate free plants was 64.07mg/plant. As a result of using lignite, sub-bituminous, peat, and cowdung as carriers for the rhizobia strains, the increases in the grain yield of the inoculated cowpea plants were 72.2%, 51.9%, 25.5% and 10.1% respectively when compared with the uninoculated ones. IFE CR9 (which is a native Rhizobium) seems to be better adapted to tropical conditions than the imported R. japonicum. When Ife brown cowpea plants were inoculated with IFE CR9 incorporated into lignite, the nitrogen content of the plants was 149.00mg/plant whereas the nitrogen content of the same plants inoculated with R. japonicum in lignite was 132.61mg/plant. TVU 1190 cowpea variety responds better to inoculation than the two other varieties. For example when TVU 1190, Ife brown and IT82E 60 were inoculated, the increases in dry weight of the plants over the uninoculated ones were 125.1%, 116% and 93.3% respectively.
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    Pollution Pattern in the Mokuro Dam in Ile-Ife
    (Obafemi Awolowo University, 1984) Petters, Hannah Itam; Odeyemi, Olu
    Bacteriological and physical-chemical analyses of the Mokuro Jam (in Ile-Ife) an its distribution system were carried out from December 1982 to November 1983 at monthly intervals, and the quality of water was assessed to establish the pollution pattern. Generally, the population density of aerobic heterotrophic bacteria varied between wet and dry seasons., While thorn was an increase in the mean monthly population of bacteria from 4.2 x 102/ml in November to 4.8 x 106/ml in February (i.e. dry season) there was a comparative decrease from 11.0 x 106/ml in June to 1.8 x 103/ml in October (i.e. rainy season), in the distribution system In the stream and in the dam, the seasonal trends of total aerobic bacterial distribution followed more or less the same pattern as in the distribution system. In the dam, the faecal coliform populations ranged from zero to 33 MPN/100 ml during the rainy season and from 2 to 221 MPN/100ml in the dry season. The same pattern was observed in the distribution system. Both faecal streptococci and Clostridium perfringens were also detected in the water samples with no definite pattern of population distribution between the seasons. The mean monthly faecal streptococci ranged from zero to 2.8 x 10 4/mt, while Clostridium perfringens ranged from zero to 538 MPN/100ml. Nitrate, phosphate, chloride and dissolved solid levels were generally low. These compounds ranged from zero to 1.16 mg/l; from zero to 0.038 mg/I, from 3.6 to 54 mg /l, and from 0.0001 to 0.058 g/100ml, respectively. The BOD varied with a range of 1.0 to 12.6mg /l in the dam. In the distribution system, the chlorine residual was generally below 1mg/l, decreasing with distance away from the chlorination point.