ABSTRACT Logging induced damages associated with two different ,harvesting systerns (Conventional Timber Harvesting and Reduced-Impact Logging (RIL» were investigated in 19.84 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 sk...
ABSTRACT Toxicity testing of chemicals on animals has been used for a long time to detect the potential hazards posed by chemicals to man. Bioassay technique has been the cornerstone of programmes on environmental health and chemical safety (Ward and Parrish, 1982). Lead is a potentially toxic chemical that may be directly ingested by man or indirectly through aquatic animals like fish and shellfish .The effects of lead on man include mental retardation, learning dysfuntion, and loss of coord...
ABSTRACT Implementing sustainable development and meeting the food needs of world's increasing population demand national and international investment in research and extension. Before fruitful investment can be guaranteed, inventoly of the present status of the object of investment is imperative. This study examined the present status of public extension network in southwestern Nigeria with a view to ascertain its readiness as a learning organization for forest conservation information. Purp...
Abstract Uncontrolled harvesting of non-timber forest products (NTFPs) poses a serious risk of extermination to several of these species in Nigeria. Yet, there is a paucity of information on the distribution, population status and sustainable management of NTFPs in most of the tropical lowland rainforests. We, therefore, assessed the population, distribution and threats to sustainable management of NTFPs within the tropical lowland rainforests of Omo and Shasha Forest Reserves, south western...
ABSTRACT Triplochiton scleroxylon, Tectona grandis, Gmelina arborea, Nauclea diderichii and Teminalia ivorensis wood blocks were biodegraded in situ in the laboratory by Lenzites palisoti a white rot fungus. The test blocks were cut into 10xlOx20 mm and exposed into the infection region of pure culture of Lenzitespalisoti for 16 weeks. The test blocks were examined for weight loss at 4 weeks interval. The percentages of weight loss obtained after 4, 8, 12 and 16 weeks of incubation of the t...
ABSTRACT This study examined the characteristics and management of street trees in Damaturu, the growing capital city of Yobe State, located in the Sudan savanah ecological zone of Nigeria. Enumeration of street trees was carried out in the major roads of Damaturu to identify tree species and determine population of the species. Data on the management of amenity trees in the town were collected through administration of questionnaire to forestry officials in the State’s Ministry of Environ...
ABSTRACT Inadequate alternative sources of energy and low income engender unsustainable exploitation of the environment by the inhabitants of semi arid regions. Literature abounds on the potentials of Jatropha curcas as an alternative source of energy. This study reports the awareness and acceptability of the energy and other potentials of J. curcas in Kano state. Primary data were collected using FGDs and a set of structured questionnaire administered randomly on 1280 farmers. Information we...
ABSTRACT This study investigated the potential participation of Ibadan residents in the development of urban forestry initiative for environmental rehabilitation of the metropolis. Data were obtained from multi stage randomly sampled 397 residents within the five local government areas (LGAs) in Ibadan metropolis. The result revealed that 49% of the respondents claimed to have trees planted around their residences. Out of this, 83% believed that these trees provide shade for them for recreati...
Abstract Forests play many diverse and multifaceted roles in our life. However, there is an emerging nexus between forest and national security in many countries, especially within the sub-Saharan region of Africa. Contrary to the noble objectives for which they were constituted, many forest reserves have become a source of security concern both at the local and national scale. In the light of this, we examined the relationship between forest and national security in Nigeria, with a view to ...
ABTRACT This study investigates the technical performance efficiency (TPE) of twenty seven sawmills purposely selected and grouped into three classes :small1001ft3 /day based on their production capacities. 243 logs obtained from 20 species of wood sourced from Southwestern Nigeria were examined in 27 selected sawmills using the variables such as wood species, log sizes, shapes and sawkerf, which have direct impact on waste generated from sawn logs and log conversion efficiency. Whereas 135 s...
ABSTRACT Despite their importance, the forest resource base in most African countries has continued to dwindle. This continuous decline in Africa forest cover and the inability to stem the tide of deforestation indicate among other things the failure of the classically structured resource management institutions established during colonial administration. Consequently, there has been a paradigm shift in forestry practices throughout the world from the classical management approach to managing...
ABSTRACT A study was carried out to investigate the dimensional properties of cement bonded particles board from wood waste of 3 urban trees common in University of Ibadan campus. The 3 wood species used for board production are Gmelina arborea, Delonix regia, and Samanea sena. The dimensional properties investigated are thickness swelling and water absorbtion.
ABSTRACT T he s t u dy qu a nt it a t iv el y d et er min e t h e i mp a ct of p ol ic y cha n g es o n t ech n ica l eff ic i ency of s ma ll s ca l e fo o d cr op far mer s in O n do S t a t e, N ige r ia , us ing t h e s t ocha s t ic fr ont i er met h od o lo g y. G iv e n t h e s p eci fica t io ns of t h e C ob b -D ou gl a s S t ocha s t ic fr ont i er mod els , t h e r es u lt s s h o w t ha t t h e ela s t icit y of mea n va lu e of fa r m ou t p u t is a n incr ea s in g fu n ct io ...
ABSTRACT In Nigeria several small scale farmers make use of organic materials such as compost and manure to maintain soil organic matter and as sources of nutrients. The advantages of organic farming could include increased productivity and enhanced biodiversity of the farm lands and surrounding environment. This paper examined the utilization of organic of practices and materials, with highlight on farmers' demographics, knowledge of organic farming, attitude and constraint to use of organic...
Abstract A 70-day feeding trial was conducted to evaluate nutrient intake, digestibility and growth characteristics of rabbits fed maize grain (mg), maize offal (mo), cassava tuber (ct) or cassava peel (cp) based diets. The four test ingredients were included at 30.84% in diets supplying 17% crude protein. The consumption of dry matter, crude protein and crude fibre were higher (P4.05) in mo and cp based diets, while apparent digestibilities were better (Pc0.05) in rabbits fed mg and ct based...