Open Access Original Research Article

Comparative Effects of Different Levels of Kolgrace Organic Fertilizer on the Growth and Yield Attributes of Greengram (Vigna radiata (L) Wilczek) in the Screenhouse

P. N. Ihejiofor, U. N. Ukwu, G. O. Adeoye

Asian Journal of Research in Agriculture and Forestry, Page 1-7
DOI: 10.9734/ajraf/2020/v6i330104

Aim: To investigate growth and yield response of greengram to different levels of Kolgrace organic fertilizer with a view to determining the most favorable application rate for greengram production.

Study Design: Completely randomized design (CRD) with treatments replicated five (5) times.

Place and Duration of Study: Screenhouse of the Department of Agronomy, University of Ibadan, Nigeria, between July to November 2016.

Methodology: Six levels of kolgrace organic fertilizer were used (0.00, 0.50, 1.00, 2.00, 4.00 and 8.00 t ha-1). Top soil (0 -15 cm) was collected from the Teaching and Research Farm of the Department of Agronomy, and leached of nutrients by soaking and washing in water for 24 hours. 2 kg of air-dry soil was mixed with the appropriate fertilizer rate and filled in each pot. 3 seeds were sown per pot and thinned to 1 seed at 2 weeks after sowing (WAS). Chemical analysis of air-dry soil sample and Kolgrace fertilizer were done at the soil chemistry laboratory of the Department of Agronomy, University of Ibadan, Nigeria, to ascertain their elemental composition. Soil particle size distribution [1], Soil pH [2], exchangeable K and Na [3], exchangeable Mg and Ca [4], exchangeable acidity [5], organic matter and organic carbon [6], available P [7], Nitrogen [8] and micronutrients (Mn, Fe, Cu and Zn) [4] were determined.

Results: Application rates were significant (p<0.05) for all the traits measured. 0.5 t ha-1 was significantly higher in plant height (39.5), number of pods (7.0) and dry pod weight (4.98). Application rate of 1 t ha-1 was higher in number of leaves (18.0) although was comparable to application rate of 0.5 t ha-1.

Conclusion: Application rate of 0.5 t ha-1 was best for three of the five traits measured and is hereby recommended.

Open Access Original Research Article

Relationship Underlying Seedlings Composition and Abundance of Mature Tree Species at Coral Rag Forest of Mnarani Ruins

Mercy Jebiwott Korir, Joyce Mnyazi Jefwa, Michael Ajanja Sakha

Asian Journal of Research in Agriculture and Forestry, Page 8-17
DOI: 10.9734/ajraf/2020/v6i330105

The tropical regions have a rich diversity of tree species which provide the basis for a number of different forms and scales of economic activity. This study therefore was conducted with an aim of enhancing the knowledge of tree species diversity (seedlings and mature trees), and their relationship at the site. The experiment was laid out in three transects and quadrants in the forest: for mature trees the transects measured 100 m by 20 m, whereas for the seedlings quadrants measured 5 m by 5 m. That is along the ocean (T1), along human settlement (T2) and along the forest path (T3). Data was collected by counting mature trees species and seedlings. Data was analysed using R software 3.4.4 and results showed that a total of 22 tree species were recorded in the forest. In T1, the highest (22) species richness was recorded with 4 tree species restricted to the site (Bourellia nemoralis, Flueggia virosa, Turraea wakefieldii and Eryithrinia abyssinica). Combretum schumanii was most abundant in mature trees (89) followed by Lecaniodiscus fraxinifolius (36), Ochna thomasiana (21) and Adansonia digitata (14). All the above abundant species except Adanosnia digitata (2) were also abundant in seedlings with (189), (11) and (21) seedlings respectively. In T2, 9 tree species were recorded. Azadirachta indica was the most dominant in both mature trees (40) and seedlings (261) while Sterculia appendiculata recorded the lowest (1) and (0) respectively. T3 was rich with three exotic tree species namely Delonyx regia, Azadirachta digitata and Lannea schweinfurthii. Lecaniodiscus fraxinifolius was the most common with (35) followed by Combretum schumanii (11). While the seedlings were (23) and (67) respectively.  In conclusion, it was evident that anthropogenic factors reduced species richness and the corag rag forest had more indeginous tree species and good seed recruitment.

Open Access Original Research Article

Assessment of Threats to Survival of Biodiversity and Ecosystem Services in Stubbs Creek Forest Reserve, Akwa Ibom State

Nsikak E. Umoren, Gordian C. Obute, Kingsley O. E. Ukaegbu

Asian Journal of Research in Agriculture and Forestry, Page 18-30
DOI: 10.9734/ajraf/2020/v6i330106

Different climes are endowed with a myriad of biodiversity resources, ecosystem services and functions suited to sustenance of lives and providing assorted raw materials for sustainable development if effectively managed. There is global outcry about disappearing biodiversity and mismanaged fragile ecosystems. Human endeavours are strongly implicated in the resulting distorted ecological balance. This study therefore sets out to examine the cause and effects of the declining singular gazetted forest reserve in Akwa Ibom State, the Stubbs Creek Forest Reserve (SCFR). Threats to survival of biodiversity and ecosystem services (BES) were studied qualitatively (a combination of field observation and engagement with key stakeholders of SCFR). Community forest occupational user-groups, corporate players and the public sector were engaged. Outcomes of the study suggest that among other factors, institutional weakness and unsustainable consumption patterns may be of primary concern in tackling further degradation. A quick concerted intervention is required to reposition SCFR for alignment with global sustainable development goal 15, ecosystem restoration and climate change adaptation.

Open Access Original Research Article

Composition and Classification of Tree Species in a Degraded Tropical Humid Rainforest in Southwest Nigeria

S. T. Ebeniro, M. D. Wali

Asian Journal of Research in Agriculture and Forestry, Page 41-48
DOI: 10.9734/ajraf/2020/v6i330108

Tree species information is essential for forest studies such as forest meteorology, botany and ecology, and across the relevant fields new techniques efficient for classifying tree species are desperately in demand. This study assessed tree species composition and classification in a degraded tropical rainforest in Southwest Nigeria. Data was collected from the Olukayode compartment of the study area of size 2 ha. Eight (8) Temporary sample plots of size 50 m x 50 m was laid using systematic line transect at 100 m intervals in the compartment. Hierarchical clustering in SPSS was used to find clusters of patterns in the measurement space. Tree species such as; Eucalyptus cameldulensis, Eucalyptus tereticornis, Khaya ivorensis, Khaya senegalensis,Nauclea diderichi, Terminalia randii, and Terminalia superba with a total frequency of 60 were identified, belonging to 3 different families. At similarity 5.0 from the dendrogram using ward linkage, samples 48 - 6 formed the first cluster, samples 28 - 9 constituted the second cluster while samples 20 - 13 constituted the third cluster. From the dendrogram using centroid linkage, at similarity 5.0, samples 59 - 7 formed the first cluster, samples 32 - 31 constituted the second cluster, and samples 8 - 28 formed the third cluster while the fourth cluster combined samples 17 - 21 which is a combination of trees from the three families. Histogram was used to show the diameter at breast height and total height distribution.

Open Access Review Article

Factors Affecting Timber Production in Akwa Ibom State (Nigeria) and the Way Forward

N. E. Esiere, N. B. Ndulue, M. P. Akpan

Asian Journal of Research in Agriculture and Forestry, Page 31-40
DOI: 10.9734/ajraf/2020/v6i330107

In Akwa Ibom State, timber is used for building, construction, furniture making, transmission pole, pulp and paper, and chemicals. Timber harvesting, processing and utilization had remained a big business to quite a number of people with its attendant forest destruction and deforestation. The State was richly endowed with forest resources, which are of great benefit to man but the high demand and continuous harvesting of timber products in the State ecosystems without any deliberate sustainable management programmes has resulted in the over-harvesting and complete devastation of the standing stock of indigenous wood species. In addition, indiscriminate exploitation of these resources has caused depletion of forest leading to serious timber deficit. This work has discussed factors affecting timber production in Akwa Ibom State and the way forward. The paper has identified deforestation and ‘dereservation’, overexploitation of forest resources, revenues target by government, population growth and infrastructure expansion, non-participation of the private sector in forest development, amongst others, as factors responsible for the decline of timber resources in the state. The paper recommends that reforestation and afforestation programmes, conservation of natural forests, private sector participation in forest management, adoption of agroforestry system and sustainable management of natural resources can improve timber production in the State.