Scholarly works in Forest Resource Management
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Item Critical factors in willingness to participate in forest management: the case of Gambari forest reserve, Oyo State Nigeria(Forestry Association of Nigeria (FAN), 2003) Jimoh, S. O.; Falade, O. F.The study investigated the factors that could motivate members of forest adjoining communities to participate in the management of Onigambari Forest Reserve. Oyo State, Nigeria. Stratified quota sampling was used to select one hundred and fifty- eight respondents among the local community members. Data processing was by simple statistics, chi-square test of independence and logistic regression analysis. Results indicate that application of financial incentives does not have significant effect on willingness to participate (p > 0.05), but the effects of non-financial incentives and sociological factors are significant (p < 0.05). Results of logistic regression show that age, educational status; incentive requirement (technical) and roles played in forest management have significant impact on willingness to participate in forest management with a log- likelihood ratio of 278.317 (X tab.= 124.342: df=138 and P= 0.05). In view of the fact that socio-economic factors such as age; education; incentive requirement, tennurial rights, marketability of forest products and forest protection technics have significant effect on willingness to participate; it is recommended that government should embark on massive awareness campaign to educate the people on the benefits they stand to derive by actively participating in forest management. The practice of tangra should be encouraged in order to motivate landless strangers to participate in forest regeneration.. The forest reserve should be managed to supply multiplicity of goods and services for social acceptability and ecological sustainability. Community Associations should be encouraged to establish nurseries from which timber takers would be required to purchase seedlings for replacing felled trees.Item Early growth and dry matter yield of gmelina arborea (ROXB) on basement complex and ferric luvisolsoils(Forestry Association of Nigeria (FAN), 2009) Falade, O. F.; Bada, S. O.The study investigated the use efficiency of selected soil nutrient elements-N, P and K in the synthesis of organic matter by Gmelina arborea seedlings. Gmelina arborea (family: Verbarnacaea) seedlings were grown on basement complex and ferric luvisol soils for 3-months. Sixty polythene pots were filled with each soil type, which formed an experimental unit. Each experimental unit was replicated three times making a total of 360 Gmelina arborea seedlings. Eight seedlings were selected weekly for the first four weeks and four seedlings per week for the remaining six weeks in each experimental unit. Composite samples of soil media and sampled seedling were taken weekly and chemically analyzed for the determination of possible changes in nutrient concentrations. The dried leaves and shoot were combusted at 500°c, for carbon content determination. Student t-test shows no significant difference in biomass carbon between basement complex and ferric luvisol soils (paired sampled t-test, 80.92 vs 80.35g/kg, respectively, p<0.05, n=10). Significant relationship exists between leaf area ratio (LAR) and leaf weight ratio (LWR) of seedlings grown on both soil types. Thus, P and N provide a much sensitive measure of the relative cost of dry matter production than potassium in these soils. The study highlights quantitative relationships that would allow silviculturists to estimate accurately the phosphorus and nitrogen-supplying power of basement complex and ferric luvisol soils.Item Early growth and dry matter yield of gmelina arborea (roxb) on basement complex and ferric luvisol soils(The Forestry Association of Nigeria, 2009-12) Falade, O. F.; Bada, S. O.The study investigated the use efficiency of selected soil nutrient elements-N, P and K in the synthesis of organic matter by Gmelina arborea seedlings. Gmelina arborea (family: Verbamacaea) seedlings were grown on basement complex and ferric luvisol soils for 3-months. Sixty polythene pots were filled with each soil type, which formed an experimental unit. Each experimental unit was replicated three times making a total of 360 Gmelina arborea seedlings. Eight seedlings were selected weekly for the first four weeks and four seedings per week for the remaining six weeks in each experimental unit. Composite samples of soil media and sampled seedling were taken weekly and chemically analyzed for the determination of possible changes in nutrient concentrations. The dried leaves and shoot were combusted at 500°c, for carbon content determination. Student t-test shows no significant difference in biomass carbon between basement complex and ferric luvisol soils (paired sampled t-test, 80.92 vs 80.35g/kg, respectively, p<0.05, n=10). Significant relationship exists between leaf area ratio (LAR) and leaf weight ratio (LWR) of seedlings grown on both soil types. Thus, P and N provide a much sensitive measure of the relative cost of dry matter production than potassium in these soils. The study highlights quantitative relationships that would allow silviculturists to estimate accurately the phosphorus and nitrogen-supplying power of basement complex and ferric luvisol soils.Item Critical factors in willingness to participate in forest management: tiie case of Gamiiari Forest Reserve, Oyo state, Nigeria.(Forestry Association of Nigeria and the Department of Forest Resources Management, University of Ibadan, 2003) Jimoh, S. O.; Falade, O. F.The study investigated the factors that could motivate members of forest adjoining communities to participate in the management of Onigambari Forest Reserve, Oyo State, Nigeria. Stratified quota sampling was used to select one hundred and fifty- eight respondents among the local community members. Data processing was by simple statistics, chi-square test of independence and logistic regression analysis. Results indicate that application of financial incentives does not have significant, effect on willingness to participate (p > 0.05), but the effects of non-financial), incentives and sociological factors are significant (p < 0.05). Results of logistic regression show that age, educational Status; incentive requirement (technical) and roles played in forest management have significant impact on willingness to participate in forest management will a log likelihood ratio of 278.317 (X(2) tab.= 124.342: df.= l38 and P= 0.05) . In view of the fact that socio-economic factors such as age; education; incentive requirement. tennurial rights, marketability of forest products and forest protection technics have significant effect on willingness to participate; it is recommended that government should embark on massive awareness campaign to educate the people on the benefits they stand to derive by actively participating in forest management. The practice of latmgya should be encouraged in order to motivate landless strangers to participate in forest regeneration. The forest reserve should be managed to supply multiplicity of goods and Services for: Social acceptability and ecological sustainability. Community Associations should be encouraged to establish nurseries from which timber takers would be required to purchase seedlings for replacing felled trees.Item GROWTH PREDICTION IN SOME PLANTATIONS OF EXOTIC TREE SPECIES IN THE NORTHERN GUINEA AND DERIVED SAVANNA ZONES OF NIGERIA(1985-06) ADEGBEHIN, J. O.Growth studies which include diameter distribution using the Weibull function, development of stand volume models, and construction of provisional top height-age and total volume production-age curves for the average site class were carried out in plantations of Eucalyptus cloeziana, E. tereticornis and Pinus caribaea. The study locations were Kabama (Zaria) and Afaka (both typical of Northern Guinea savanna zone of Nigeria), Nimbia (Derived savanna zone) and Miango, Vom and Ta-Hoss (on the Jos Plateau). E. cloeziana represented only at Afaka had 4 experimental sample plots with age range of 4.2 - 15.5 years. E. tereticornis represented at Kabama and Afaka had 6 sample plots with ages from 3.7 - 15.5 while P. caribaea represented in all the study locations except Zaria had 43 plots with ages between 4.7 - 29 years. In fitting the Weibull distribution to the individual diameter plot data, WWINGO, the most suitable Weibull (program) subroutine for determining the Weibrill parameters in the stands, was capable of describing the diameter distribution in the plots as from the minimum age of 4 years for E. cloeziana and 6 years each for E. tereticornis and P. caribaea. On testing the Weibull parameter predictive models constructed (based on stand attributes and site factors) in new stands, while those of E. cloeziana and E. tereticornis gave good predictions as from the respective minimum age limits stated above, those of P. caribaea did not give reliable predictions until the age of 10 years. With reference to the stand volume model developed for each species, that of E. cloeziana gave the best prediction with the root mean square error (RMSE) of 2.25 m3/ha, followed by that of E. tereticornis with RMSE of 4.7 m3/ha and that of P. caribaea with RMSE of 10.1 m3/ha. The models predicted well within the range of field data when tested in new stands. Out of the three functions used in fitting the provisional top height-age (site index) curve for the average site class for each species, the Gompertz model, in most cases, gave better fittings than the Logistic while the polynomial function was the poorest. Based on the best-fit model for each species and some other criteria, a provisional average site class was defined as top height of 27.4 m at a reference age of 13 years for E. cloeziana, 24.8 m at the age of 15 years for E. tereticornis and 23.4 m at age 20 for P. caribaea. The Gompertz model was also more reliable than the Logistic in fitting the provisional average total volume production-age curve for each of the species. A maximum total volume production of about 240 m3/ha at age 13.4 years, 286 m3/ha at age 19.4 years and 726 m3/ha at age 30 could be obtained for E. cloeziana, E. tereticornis and P. caribaea, respectively, on an average site. The applications of the Weibull parameter predictive models in forest management, and the expected optimum rotation ages for the species in view of the growth figures obtained from the other growth models were discussed.Item Promotion of intra-African trade in timber and timber products(2009-07) Ajewole, O. I.Item Analysis of trends in forest charges and government expenditure of forestry in Africa(2002) Ajewole, O. I.Item Prospects and challenges for incorporating trees into urban infrastructural developments in Nigeria(2008) Ajewole, O. I.Nigeria’s major cities are characterised by huge and growing social and environmental problems,such as air, land and noise pollution; non-conducive local micro climatic conditions; and stressful social and psychological living environments. These result from in- adequate, dilapidated and overstretched infrastructure, degraded urban physiognomy, increasing levels of unemployment, crime, insecurity and other social vices. These, in addition to inherent technical and economic constraints, make the in corporation of trees into the social and physical fabric of overall planning of towns and cities in Nigeria imperative. This is a natural and cost-effective means of alleviating environmental, social and economic problems in many of the Nigerian major cities. Successful integration of trees/ forests into overall urban planning will require the development of appropriate information, policy, administrative and legal frameworks, enlistment of social and political support, as well as appraisal of technical feasibility and environmental suitability of incorporation into the urban landscape. More importantly, sustainable urban forestry development in Nigeria will of necessity require the availability and readiness of NGOs to spearhead an urban forestry movement in the country.Item Potential of Senecio Biafrae (Sierra Leone Bologni) to contribute to improved livelihood in Ekiti State(2007) Ajewole, O.; Popoola, L.Item Potential of Senecio Biafrae (Sierra Leone Bologni) to contribute to improved livelihood in Ekiti State(2007) Ajewole, O. I.; Adegeye, A. O; Bello, F. A.