BUKOLA OYEBADE

Agroforestry is a land-use system that integrates trees (woody perennials), crops, people, and/or animals on the same piece of land in order to get higher productivity, greater economic returns, and more social benefits on a sustained basis. It remains the only prospective solution to address many forestry-related challenges in the world. It involves the application of woody perennials trees on the same management land unit with agricultural crops and or animals, either in some form of spatial arrangement or temporal sequence in which there are both ecological and economical interactions between different components. These interactions have been discovered to be so significant in environmental management, as it helps in solving numerous environmental degradation and climate change related problems. This paper presents the potentials Agroforestry practices beginning from its capacity to earn sustainable productions of food and wood products to the protective and environmentally-endow...

This research elucidates non linear relationship for volume estimation of Gmelina arborea in Uyo Ravine plantation, Akwa Ibom State Nigeria. Series of functional models were developed and the estimates of measurement of stand parameters such as diameter at breast height (DBH), stump diameter (Dst), total height (THT), merchantable height, (MTH), merchantable length (MLT) were used for modeling procedures for best fit models for stand volume estimation. Twenty temporary sample plots of 20m x 20m were randomly established without replacement and all trees in each plot were measured. Quantitative data collected were subjected to correlation and regression analyses for determination of empirical relationship between the growth variables. The developed models for volume estimation were evaluated by confirming the goodness of fit of the model and the statistical significance of the parameters using statistical relevant fit indices and criteria. The results of the study showed there were s...

Individual-tree models of basal area growth and density were developed for seven plantation species in swamp forest zone of Rivers State, Nigeria. Tree growth data were collected from pure permanent sample plots of seven plantation species within the study area with measurements of diameter at breast height (cm), diameter at the base (cm), total height of tree (m), and also the number of tree per plot was taken and obtained from plantation records. The Quantitative data collected from these selected plantation species were subjected to descriptive analysis, correlation and regression analyses. Linearized models for description of relationship between BA and other growth attributes were developed. The results of the major growth variables by species in the study area showed that Treculia africana has the highest dbh mean value 30.804 ±2.031 (cm) with density 0.0022 and basal area per hectare 1.79×10 (m). Similarly, the results also showed that Nauclea dedirrichii has the lowest dbh m...

The dimension of a tree crown has an apparent effect on and is strongly linked with the growth of the tree and its diverse parts. Crown information is an important part of numerous growth and yield models. Hence, empirical predictive equations for crown diameter of a mixed species plantation in Southern Nigeria were developed and evaluated in this study. In studying this phenomenon, total enumeration of the selected species in the mixed species plantation was carried out. Moreover, major growth attributes of 185 trees of six species, namely; Khaya ivorensis, Entandrophragma angolense, Terminalia ivorensis, Tectona grandis, Treculia africana and Mansonia altissima were measured and estimated using mensurational methods. Descriptive, correlation, regression and residual analyses were then applied to the quantitative data obtained from the mixed species plantation. For all the species, the best adjudged model with the best fit indices was Ln(cd) = Ln(b0) + b1·CPA·dbh, R = 0.936, SEE = ...

Immense indigenously known antimicrobial and insect repellent activities of many plants’ tissues present a pool for selecting and formulating much needed alternative environmental friendly biocides to limiting wood degradation agents across the globe. Single and combined treatments of Erythrophleum suaveolens stem bark extract at 5%, 10%, 15% and 20%, and with 10 mL of Lagenaria breviflora fruit pulp juice extract on wood blocks of Triplochiton scleroxylon were comparatively investigated against outdoor field termites for three months in Port Harcourt, Nigeria. Erythrophleum suaveolens stem bark yielded 4.4% extract. Combination effect of Erythrophleum suaveolens stem bark extract and Lagenaria breviflora fruit pulp juice extract (ESLE) treatments comparatively showed lower absorption and retention but significantly enhanced better termiticidal activity than Erythrophleum suaveolens stem bark extract alone (ESEA). The two extract types showed the strongest antitermites’ activities a...