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Item Utilization potentials of eucalyptus grandis (hill ex maiden) a municipal tree on the University of Ibadan campus(Medwell Journals, 2009) Omole, A. O.; Adetogun, A. C.; Banjoko, O.Selected physical and mechanical properties of 28 years old Eucalyptus grandis planted as municipal trees were evaluated to determine its utilization potentials. Five trees were selected and felled. Test samples were then taken at four different levels along the bole. The properties of the wood evaluated were moisture contents, calorific energy, impact and static bending properties. Data collected were statistically analysed using ANOVA. Statistical analysis of the results showed significant variation in the calorific energy properties, impact and static bending (MOR and MOE) along the bole of Eucalyptus grandis. Moisture content however, showed a level of axial uniformity All the results of the test carried out showed that Eucalyptus grandis is a very strong wood species, which can be used for load bearing work in construction such as flooring and paneling. Due to the high calorific energy values recorded in the study off cuts of this wood have great potentials for fuel wood and charcoal production.Item PRESERVATIVE USING CRUSHING STRENGTH(2009) Omole, A. O.; Adetogun, A. C.; Okonkwo, O. O.A study was carried out to determine the efficiency of wood energy production in Akinyele Local Government of Oyo State. Ten fuelwood and five charcoal wood species were selected as samples using availability as criterion. Energy parameters including moisture, ash and energy contents, and density of the samples were determined. The earth kiln system of charcoal production was used 10 determine the efficiency of the charcoal production method. Data analysis was carried out using a combination of t-tests and descriptive statistical methods. Results showed that the moisture contents ranged between 10.6 and 32.45% for the fuelwood species and 5.2 and 7.7% for charcoal. The ash contents ranged between 1.0 and 6.0% for fuelwood species and 10 and 5.0% for charcoal. Energy contents for fuel wood range between 15.79 and 28.58 MJ/kg and between 2.51 and 6.82 MJ/kg for charcoal respectively. Specific gravity for fuelwood species ranged between 0.53 for Markhamia and 0.89 for Funtumia and between 0.46 for Parkia and 0.63 for Butyreospermum for charcoals species. Outputs from the earth kiln method were found to be about 21.01% which implies that at least one kilogramme of charcoal is produced from five kilogramme of wood.Item Municipal tree management in a Nigerian university(Ecological Society of Nigeria, 2008) Omole, A. O.There is a growing recognition that municipal trees improve the quality of life in many ways through the provision of both goods and services. For proper tapping of the benefits, urban residents also need to manage the municipal trees sustainability. Thus, the study is carried out to assess the management technique for the municipal trees in University of Ibadan campus. A technical assessment of the activities of the operations crew of the Campus Tree Management Committee saddled with the responsibility of managing the trees was carried out for a period of five years. Using a checklist and job profile form, information were collected on tools and equipment used by the tree management committee; number of request per year: location and number of treated cases; species of the treated cases; type of treatment provided; working conditions of the crew and methods adopted; efficiency of the operation; and hazards and safety of the operations team. Data collected were analyzed wing descriptive statistics. The study revealed that all the stakeholders appreciated the importance of the municipal tree on campus. Fifty eight percent of the requests and 100% of emergency cases were attended to and a total of 369 trees of different species were treated. The crew members are experienced in urban tree management, but there is need to procure modern equipment for tree management in residential areas to reduce the work stress and hazards of the job. There is need to involve the entire University community in the management of the trees through development of policies that will minimize the disturbance of municipal trees, promote a tree friendly attitude in relation to development and expansion. Considering the number of dangerous trees being removed presently on the campus, there is therefore the urgent need to improve on the effort to plant new trees.Item Treatment of gmelina arborea with CCA using themal process(Forest Research Institute Malaysia, 2007-07) Adetogun, A. C.; Omole, A. O.Item Resistance of three Nigerian hardwoods to decay caused by brown-and white-rot basidiomycetes(2006) Adetogun, A. C.; Aina, O. M.; Ogunsanwo, O. Y.; Omole, A. O.Assessment of resistance of untreated and n - hexane extract wood blocks of Afzella africana, Nesogordonia papaverifera end Teclona grandis to decay caused by Fomes lognosus, Lentinus Lepideus and GloephyIlum trabeum using percent weight loss was carried out . The study revealed that the durability of these wood species related primarily to the presence of the extractives in the heartwood. Removal of the extractive from the heartwood increases the susceptibility of the wood species to decay. The weight losses for A. africana were 56.3%, 58.1% and 58.7% for F. lignosus, L. lepideus and G. trabeum respectively. N. papaverifera showed weight losses of 57.2%, 58.3% and 58.9% for F. Iignosus, L. lepideus and G. trabeum respectively while T. grandis decreased in weight by 64.2% 67.4% and 78.2% for L. lepideus, G. trabeum and F.lignosis, respectively.Item Reduced impact logging of gmelina plantation in Omo Forest Reserve, Nigeria(2005) Omole, A. O.; Adetogun, A. C.; Akinyemi, O. A.Logging induced damages associated with two different harvesting systems (Conventional Timber Harvesting and Reduced-Impact Logging (RIL) were investigated in 1984 compartment of Gmelina arborea plantation in Omo Forest Reserve. The same equipment and felling crew were used for both methods. Felling was done using heavy chainsaw (Stihl 070) and skidding was carried out with crawler tractor. The types and severity of damage to the residual stand were determined for felling and skidding operations in both methods using visual assessment. Data collected were analyzed using a combination of percentages and descriptive statistics. The residual stand based on tree population were 68.28% for conventional logging and 34.88% for reduced-impact logging. The degree of damage was based on severity of injuries on individual trees. These were categorized as light injury, medium injury and heavy injury. Values obtained for the three categories of injury were 16.36, 11.06 and 42.0 1% and 5.34, 7.16 and 22.41% for conventional wood harvesting and reduced-impact logging respectively. This result shows that RIL, has the potential of considerably minimizing damages to residual stand by almost half when properly carried out.Item Preliminary study on use of engine oil as wood preservative(2000) Omole, A. O.; Onilude, M. A.Test samples of Ceiba pentandra Linn, Antiaris africana Engl and Triplochiton Scleroxylon K. schum were treated with spent and new engine oil (SAE40). Three methods of preservative application used are brushing and soaking for 24 hours and 48 hours. The absorption per unit volume of the wood were evaluated. The static bending strength and stiffness values of samples soaked in used engine oil for 48 hours were also obtained. The highest mean absorption rate per unit volume recorded in the study were 30.20kg/m3 for Triplochiton scleroxylon,_and 39.20 kg/m3 for both Ceiba pentandra and Anliaris africana when soaked in new engine oil for 48 hours. The least mean absorption rate of 15.80 kg/m3 19.80kg/m3 and 20.00kg/m3 were recorded for Triplochilon scleroxylon, Antiaris africana and Ceiba pentandra respectively. Following used engine oil application by the brushing method. Statistical analysis carried out showed that both the species and methods of preservative application are significant factors to consider in determining the absorption rate per unit volume of the wood samples. Test results further showed that the engine oil used as the preservative oil had no significant effect on the bending strength of the treated wood samples.Item Effects of process variables on the strength properties of veneer laminated cement bonded particle board from mixed tropical hardwoods(1999) Omole, A. O.; Badejo, S. O. O.Modulus of Rupture (MOR) and Modulus of Elasticity (MOE) of veneer laminated wood cement panel were evaluated. The boards were made of 3 layers comprising 1.5 mm thick mixed hardwoods sawdust for the two surfaces, and 9mm thick core layer made of plantation grown Gmelina arboma flakes. Three variables were investigated namely: Density at three levels (1000 kg/m3, 1100kg/m3 and 1200 kg/m3), Cement wood ratios of 2.5:1.0, 2.75:1.0 and 3.0:1.0 and glue spread of 1.02 kg/m2, 1.43 kg/m2 and 1,74 kg/m2 double due line (DGL) for the boards lamination. For all the treatment combinations, the MOR ranged from 26.79 N/mm to 42.59 N/mm2 while for MOE, the mean value was in the range of 3114N/mm2 to 5310N/mm2. At board density level of 1250 kg/m3 the laminated panels gave value of the highest MOR and MOE. Statistical analysis showed that the three variables considered in this study had significant on the board strength.Item Potentials of sawmill wood wastes for pulp and paper production(2008-04) Adetogun, A. C.; Omole, A. O.; Adejumo, T. O.This study was carried out to assess the suitability of sawnil1 wood wastes as potential raw material for the production of pulp and paper in Nigeria. Sawmill wastes of three wood species: Aningeria robusta, Nesogordonia papaverifera and Terminalia ivorensis were selected for the study. There were three set factors: control, shaving and saw dusts. The collected wood samples were macerated using a solution of glacial acetic acid and hydrogen peroxide. Data collected were analysed using a combination of descriptive and anova. The result showed that the average fibre length of the species for the control ranged between 1.1321mm, 1.0660mm and 1.5040mm for Aningeria robusta, Nesogordonia papaverifera and Terminalia ivorensis respectively. The fibre lengths of wood shaving are 1.0978mm, 1.0361mm and 1.2888mm for Aningeria robusta, Nesogordonia papaverifera and Terminalia ivorensis respectively while the fibre lengths of the sawdust are 1.0391mm, 0.8694mm and 1.1495mm respectively. Average fibres lengths of untreated wood of the studies species compare favorably with those of Gmelina arborea and fourteen Nigerian Savanna species. Average fibres lengths of untreated wood of the studies species compare favorably with those of Gmelina arborea and fourteen Nigeria Savanna species. It was however discovered that the effect of machining of wood on the fibre length is significant. Sawdust and shavings should be explored for paper production in Nigeria. Research should be carried out to establish the pulping characteristics of sawdust and shavings and the paper grades for which they are best suited. Research should also reveal the form the degree of modification like blending with long fibre pulp that should be incorporated into the materials in order to perfect them for the desired use(s).Item Senna siamea (LAM) and its potential for protective forestry(1999) Oluwadare, A. O.; Omole, A. O.There is problem of desertification worldwide. It is most prevailing in the northern part of Nigeria where the scanty vegetation cover is being destroyed daily for firewood. Firewood problem has been identified as one of problems contributing to land degradation. There is need to plant suitable species with good calorific (fuel) value which in turn will improve the soil as well as ameliorate the encroachment of desert. Senna siemea wood samples were collected from the University of Ibadan plantation. The fuel value was determined using ballistic bomb calorimeter. Twenty trees of the same age were assessed. The mean fuel value for wood and bark were 22275kj/kg and 20961kj/kg respectively. The highest radial value was found near the pith with mean value of 23312.47kj/kg and the least toward the bark (21299. 26kj/kg). Mean tree height and diameter at breast height were 14.20m and 21.68cm respectively. Based on this performance, Senna siamea is being proposed as a suitable species for reforestation, protective forestry in soil conservation, reclaiming denuded areas and for firewood plantation.