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Articles by W.B. Akanbi
Total Records ( 7 ) for W.B. Akanbi
  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.
  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.
  O.O. Olatunji , G.E. Akinbola , G.O. Oyediran , B.A. Lawal , W.B. Akanbi , J.C. Obi and F.M. Owoade
  Detailed soil survey of Mycorrhiza fungi distribution of 6 soil types of southwestern Nigeria was carried out at the valley bottom of Faculty of Agriculture and Forestry, University of Ibadan to investigate the relationship between different soil types and how it affect Mycorrhizal distribution. Sampling points were determined using a rigid grid survey method. Transect were cut at every 20 m interval across the field, while samples were collected at every 10 m at both topsoil (0-15 cm) and subsoil (15-30 cm). The whole landscape was classified into 6 series namely: Apomu (series I), Jago (series II), Matako (series III), Ikire (series IV), Oshun (series V) and Adio (series VI). A total of 186 samples were collected for chemical, physical and Mycorrhiza extraction, identification and count at the laboratory. Mycorrhiza distribution was found to be highest at topsoil in all the soil series than at the subsoil, except on soil series I where the subsoil population was higher. Soil series VI has the greatest population of Mycorrhiza in both the topsoil and subsoil. Thus, soil types do not significantly affect the population of Mycorrhiza fungi.
  P.A. Babajide , W.B. Akanbi , L.O. Alamu , E.A. Ewetola and O.O. Olatunji
  Green house experiments were conducted to determine the effect of different rhizobial and mycorrhizal species on growth, nodulation and biomass yield of soybean (Glycine max), grown under low fertile eroded soil condition in the South western Nigeria. It was a factorial experiment with 2 levels of soil (sterile and non-sterile), inoculation with Glomus clarum (with and without) and inoculation with either R25B or IRJ2180A rhizobial strain, while the control received no inoculation of any of the microbial strains. Each treatment was replicated 3 times and the trial was arranged in a Completely Randomized Design (CRD). Plant growth and biomass yield were significantly enhanced by arbuscular mycorrhiza in both sterile and non-sterile soil conditions, compared to the control. Combined inoculation of mycorrhiza with any of the rhizobial strains significantly improved plant growth and biomass production. The effect of the combined inoculation was particularly more effective with mycorrhiza + R25B rhizobium inoculation ,which had the highest values of plant height (68.8 cm), stem circumference (2.94 cm), number of leaves (39.0), shoot dry weight (16.1 g) and root dry weight (4.6 g), while the control had the least values of 33.2, 0.60 cm, 15.0, 4.4 and 1.6 g, respectively. Nodulation was equally enhanced by mycorrhizal and rhizobial inoculations under sterile and unsterile soil conditions. The percentage mycorrhizal root colonization values ranged from 4.0-42%. Root colonization was highest for mycorrhizal inoculated plants grown on sterile soil. Thus, dual inoculation of mycorrhiza + R25B rhizobium, may be beneficial to soybean production in the tropics, where nutrients particularly available P and total N are very low. Hence, a relatively low input technology, for improved soil fertility/productivity and sustainable arable, green manure and forage crops production.
  P.A. Babajide , O.S. Olabode , W.B. Akanbi , O.O. Olatunji and E.A. Ewetola
  An adoption of a low input technology, which carefully incorporates wild-plant residues such as Mexican sunflower (Tithonia diversifolia (Hemsl.) A. Gray), into soils for vegetable crop production (either as a substitute or supplement to the highly-priced chemical/synthetic fertilizers), may be beneficial to sustainable tropical crop production, most especially in the aspects of improved soil fertility, productivity, pH, regulated soil temperature, moisture and bulk density. Field studies were conducted to assess the response of tomato to composted tithonia-biomass with or without N-mineral fertilizer and the possible effects on soil physical and chemical properties, in southwestern Nigeria. The treatments introduced were 0, 3.0 and 6.0 tons ha 1 of composted tithonia-biomass and 0, 30 and 60 kg N ha 1 of urea (46% N). Soil physical and chemical properties were significantly and positively enhanced with increasing rate of compost application. Growth and yield parameters such as plant height, leaf area, number of branches, tap-root length, stem circumference, fruit diameter and fruit yield significantly increased with increasing levels of sole and combined application of compost and N-mineral fertilizer. Combined application of 30 kg N ha 1 and 3.0 tons ha 1 was found adequate for optimum growth and fruit yield and even for desirable improvement in the soil physical and chemical properties.
 
 
 
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