The crown of tree is the centre of physiological activity which gives an indication of the potential photosynthetic capacity on a tree. Though, its measurement remains a challenge in forest inventory task. The ability to predict crown diameter from stump diameter provides an effective technique of obtaining its estimate. This helps in detecting the excessive tree felling than actual requirements and wildlife suitability.The main objective of this study was to develop and test crown diameter prediction models for silvicultural management of naturally grown Parkia biglobosa within the University of Agriculture, Makurdi. Nine 100 m x 100 m temporary sample plots were established using simple random sampling method. Crown diameter and stump diameter were measured in all living P. biglobosa trees with stump diameter ≥10.0 cm. Least square method was used to convert the counted stumps into harvested crown dimension. Three linear and three non-linear models using stump diameter as the exploratory variable were developed and evaluated using the adjusted coefficient of determination (Adj.R 2 ), standard error of estimate (SEE), prediction error sum of squares (PRESS) and Akaike information criterion (AIC). The crown-stump diameter relationship was best described by the double logarithmic function with . 2 = 65.1%, = 0.1729, = 262.9998 = 717.56.The result showed that Crown diameter estimation was feasible even when the only information available is stump diameter.The resulting equation was tested for validation with independent data obtained from additional plots and was found to be desirable for estimating the crown diameter for Parkia biglobosa in Makurdi,
The research was conducted at the screen house of the Department of Forestry and Wildlife, Faculty of Agriculture, Nnamdi Azikiwe University, Awka, Anambra state, Nigeria. The study was carried out from January to May 2021 to access the effect of different potting media on germination and early growth of Newbodia laevis. Treatments were laid out in a Complete Randomize Design (CRD) with four replications. The germination parameters measured were days to germination, germination period and germination percentage while the growth variables measured includes plant height, collar diameter and number of leaves. The potting media used were T1 (topsoil and cow dung), T2 (topsoil and goat dung), T3 (topsoil and poultry dropping), T4(topsoil and sawdust), T5 control (topsoil only). Data collected were subjected to R software, using the following packages: plyr, car, gvlma, one-way tests, user friendly science, ggplot. Results obtained indicated that T1 had the highest germination percentage (85%) followed by T2 and T3 with germination percentages of 82% and 80% respectively. T4 had the poorest germination percentage (60%). The results also showed that the treatment had direct effect on the seedling early growth; the highest mean collar girth was observed in T1 with 1.85 cm while the least was observed in T4 with 0.72 m. The highest mean height was observed in T2 with 22.15 cm while the least was observed in T4 with 7.23 cm. Also, the highest mean number of leaves was observed in T2 with 21leaves while the least was observed in T4 with 7 leaves. Based on the findings of these experiments it is recommended that for maximum growth and optimum germination of Newbodia laevis, T1 and T2 should be used, sawdust had poor germination and growth performance and thereby is not recommended for the early growth of Newbodia laevis seedlings.
Non-Timber Forest Products are important sources of income that can supplement farming and/or other activities to the rural dwellers. In spite of this, its potential to improve the standard of living and generate income to rural dwellers has not been known in Awka-North Local Government Area. The study was carried out from January to August, 2017. The study identified the variety of non-timber forest products (NTFPs) available to rural households, the level of income generated by households from these available Non-timber forest products and constraints to Non-timber forest products collection in the study area. Three towns; Achalla, Amansea and Mgbakwu were selected using multi-stage random sampling technique. A total of 100 copies of structured questionnaires were administered to obtain information from respondents who engaged in NTFPs based activities in the selected towns. Data collected were analyzed using descriptive statistics and 5-point Likert Type Scale. The study revealed that fish, snail, bush meat, spices, firewood, fruits, seeds and nuts, vegetables and honey are the Non-timber forest products available to the rural dwellers. Monthly income of ₦61,000 and above was generated by the rural dwellers who engaged in NTFPs sales. Lack of marketing, bush burning, deforestation, NTFPs scarcity, over exploitation, transportation, bad road network, distance from forest, market price of other products and unfavourable government policies are the constraints confronting the respondents in the collection of Non-timber forest products in the study area.
Forestist is an international, scientific, open access periodical published in accordance with independent, unbiased, and double-blinded peer-review principles. The journal is the official publication of İstanbul University-Cerrahpaşa Faculty of Forestry and continues publication since 1951. Forestist is published biannually on January and July and the publication language of the journal is English. Forestist aims to contribute to the literature by publishing manuscripts at the highest scientific level on all fields of forestry. The journal publishes original articles, reviews, and brief notes that are prepared in accordance with the ethical guidelines. The scope of the journal includes but not limited to; forest, forestry, forestry based industries, landscape and environment. The target audience of the journal includes specialists and professionals working and interested in all disciplines of forestry.
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