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Articles by O.A. Olaniran
Total Records ( 7 ) for O.A. Olaniran
  W.B. Akanbi , A.O. Togun , O.A. Olaniran , J.O. Akinfasoye and F.M. Tairu
  Variation in soil Nitrogen (N) content affect growth and development of egg plant (Solanum melongena L.) and may lead to changes in crop physiological conditions at flowering and the physio-chemical qualities of fruit and seeds produced. Two experiments with a `long purple` variety of eggplant were carried out under field conditions to establish the relationship between N availability and fruit qualitiesand between the fruit size and q ualities of the seeds produced. The treatments consisted of four N levels (0, 40, 60 and 80 kg N ha-1) combined factorially with three fruit sizes: small (0-2.5 cm in diameter, S1), medium (2.6-5cm, S2) and big (>5cm, S3). Fresh fruit physio-chemical qualities such as fruit weight and diameter, per fruit number of seeds and seed weight, fruit pH, % juice, Crude Protein (CP), total solid, Fe and ascorbic acid contents were assessed. Data collected were statistically analyzed for determination of treatment effects. Nitrogen deficiencies reduced both physical and chemical properties of egg plant fruit. For most of the parameters assessed 80 kg N ha-1 treatment proved to be the best. However, crop performance under 60 kg N ha-1 fertilizer regime were, in most cases, were not statistically siginificant when compared to application 80 kg N ha-1. The biggest fruit (S3) consistently had the best physio-chemical qualities irrespective of N level. The exceptions to this are CP where there was no responseand seed weight/fruit and Fe content where S2 and S3 fruit sizes gave similar results. It was concluded that for production of high quality fruits and seeds in eggplant, application of 60 kg N ha-1 in combination with selection of big fruit (= 5cm in diameter) seems to be the best agronomic practices.
  T.A. Adebayo , O.A. Olaniran and W.B. Akanbi
  The study evaluated the effectiveness of botanical pesticides Tephrosia vogelii and Petiveria alliacea for the control of insect pests in cowpea field. Extracts from the plants were compared with a synthetic insecticide, decis. The extract of Tephrosia vogelii was the most effective of the botanicals and ranked equal to that of synthetic insecticide decis in reducing the population density and damage caused by the insects prevalent in many experimental sites in southern Guinea Savannah of Nigeria. The importance of using botanicals as insecticides in developing countries is discussed in the study.
  W.B. Akanbi , C.O. Adeboye , A.O. Togun , J.O. Ogunrinde , S.A. Adeyeye , J.A. Akinfasoye and O.A. Olaniran
  The use of both mineral fertilizer and organic manure has been found to be a sustainable technology for crop production and integration of mineral fertilizer with crop residue compost could further increase crop yield. This assertion was tested in Nigeria by nourishing Telfairia occidentalis with Cassava Peel Compost (CPC) with or without mineral fertilizer. The treatments tested were: 0, 45 and 60 kg N from NPK; 45 and 60 kg N from CPC; 45 kg N from NPK + 15 kg N CPC; 30 kg N from NPK + 30 kg N from CPC and 15 kg N from NPK + 45 kg N from CPC. The treatments were laid out in randomized complete block design replicated thrice. Results obtained were statistical analyzed and significant means separated with Duncan Multiple Range Test (p 0.05). Application of 45 kg N from NPK + 15 kg N from CPC brought about significant improvement in growth, shoot and fruit yield as well as shoot and seed quality of Telfairia occidentalis. This treatment produced herbage yield, shoot protein and N, P and K mineral elements that are similar to what was obtained with application of 60 kg N from NPK alone or joint application of 15 kg N from NPK + 45 kg N from CPC. These results support the concept of synergy between composts and mineral fertilizer and provide further stimulus to employ blends instead of sole application of compost or mineral fertilizer for crop production.
  O.A. Ojo , T.A. Adebayo and O.A. Olaniran
  The biological response of bacteria, actinomycetes, fungi and protozoan to four fungicides (Phenyl mercuric acetate, pentachloro-nitrobenzene, benomyl and captan) was investigated in a garden soil treated with three different rates of these fungicides. The microbial populations were estimated at different days after treatment using the standard dilution plate-count technique. Phenyl mercuric acetate completely inhibited the soil bacteria and fungi at all rates of application up till 33 Days After Treatment (DAT), after which recolonization of the soil occurred. The significantly (p 0.05) highest bacteria population of 22.11 x10 cfu g-1 and 16.03x10 cfu g-1 of actinomycetes population in soil was observed in the soil samples treated with benomyl at the application rate of 225.0 ìg g-1 and 63DAT when compared with that of untreated soil sample. Pentachloro Nitrobenzene (PCNB) gave significantly lowest (p 0.05) population of actinomycetes (0.03x10 cfu g-1) and protozoan (0.0x10 cfu g-1) compared to all other treatments throughout the period of study. The actinomycetes population in the captan and ceresan treated soils sample increases with days after treatment. In general, fungi and protozoa were more susceptible to fungicides than bacteria and actinomycetes. Phenyl mercuric acetate and pentachloro-nitrobenzene were more toxic particularly to soil, micro organisms, compared to benomyl and captan. The significant effects of fungicides on soil microbial population is here in discussed.
  W.B. Akanbi , O.A. Olaniran , J.O. Olaniyi , M.A. Ojo and O.O. Sanusi
  Recent survey of indigenous vegetables in south western Nigeria revealed farmers` interest in their cultivation if not for lack of adequate technical knowledge. The efforts to develop appropriate production package prompted us to assess the effects of Cassava Peel Compost (CPC) in combination with or without mineral fertilizer on the growth, shoot yield and nutritional values of Celosia argentea. The treatments applied were: T1 = 375 kg ha 1 NPK; T2 = 2 t ha 1 CPC; T3 = 3 t ha 1 CPC; T4 = 1 t ha 1 CPC + 187.5 kg ha 1 NPK; T5 = 2 t ha 1 CPC + 187.5 kg ha 1 NPK; and T6 = 0 (non-fertilized plant). The treatments were laid out in a randomized complete block design with 4 replicates. Growth and nutritional quality assessments were done on stem height and girth, number of leaves, leaf area, dry matter and shoot yields, shoot proximate and elemental contents. Data collected were subjected to analysis of variance and significant means separated using Duncan Multiple Range Test. The highest growth parameters were recorded with application of 375 kg ha 1 NPK and this was not significantly different from what was observed with T3 and T5. In the case of crop nutritional contents, combined application of 2 t ha 1 CPC + 187.5 kg ha 1 NPK produced plants that were better than other treatments. It could be concluded that the use of cassava peel compost is adequate for celosia production.
  F.G. Sodeinde , I.O.A. Adeleye , V.O. Asaolu , S.R. Amao and O.A. Olaniran
  Panicum maximum cv T58 was evaluated in the derived savanna zone of Nigeria for its yield and nutritive value when fed to the WAD sheep. The agronomic experiment was a split plot design with fertilizer Nitrogen levels (0, 100, 200 and 400 KgN/ha) as main plots. Each was replicated thrice and cutting intervals (6 and 8 weeks) served as sub plots. Grasses harvested at both the 6th week and 8th week after planting were fed to the 8 WAD sheep in a latin square design for the digestibility trials which lasted 21 days. Feed intake and weight gain of the animals were recorded at the beginning and end of the trails. Animals on the 200 KgN/ha fertilized grasses at 8 weeks gained an average of 2.1 g/day after consuming an average of 1.3 KgDMY per day. They had a CP digestibility of about 89.1%, which was significantly different (p<0.05) from the control that had 79.7% CP digestibility. The animals on the control gained about 0.04 g/day after consuming an average of 0.9 KgDMY/day. Mineral content except for copper increased in significant proportion (p<0.05) as the nitrogen level increased in the soil. The increase in the phosphorus level might be responsible for the higher feed intake recorded for animals on the 200 KgN ha-1 grass plot since it increased the palatability and acceptability level. Proximate analysis of the grass revealed a crude protein value of 6.9, 9.2, 12.8 and 13.1% CP for 0, 100, 200 and 400KgN ha-1 respectively at 8 weeks. The 6-week cutting had 5.5, 7.5, 9.2 and 10.1% crude protein values for the different treatments, respectively.
  T.A. Adebayo , O.A. Ojo and O.A. Olaniran
  Two insecticides were applied separately to the soil at 4000 and 8000 ppm for thiodan® and 6000 and 12000 ppm for karate®, respectively. Their effects were investigated at 0, 14, 21, 28, 35, 42 and 49 Days after Treatment (DAT) on the population of bacteria, fungi, actinomycetes and protozoa in the soil. The microbial population was estimated using the standard dilution plate technique. The two insecticides investigated at both rates of application significantly (p 0.05) reduced the fungi, actinomycetes and protozoa population in the soil. Whereas the bacteria population was significantly (p 0.05) increased. Thiodan at the rate of 8000 ppm gave significantly (p 0.05) lowest population of fungi in the soil compared to actinomycetes and protozoa population. A progressive increase in the soil microbial population for various insecticidal treatments in the order of 49DAT > 35DAT >28DAT > 21DAT > 14DAT > 0DAT was observed. The significance of thiodan and karate insecticide at two different rates of application on the soil microbial population is herein discussed.
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