Asian Journal of Research in Agriculture and Forestry 2021-10-09T02:54:14+00:00 Asian Journal of Research in Agriculture and Forestry Open Journal Systems <p style="text-align: justify;"><strong>Asian Journal of Research in Agriculture and Forestry</strong> <strong>(ISSN: </strong><strong>2581-7418)</strong> aims to publish high quality papers (<a href="/index.php/AJRAF/general-guideline-for-authors">Click here for Types of paper</a>) on all aspects of Agricultural and Forestry research. This journal facilitates the research and wishes to publish papers as long as they are technically correct, scientifically motivated. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> Tree Species Composition, Richness and Diversity in the Northern Guinea-Savanna Taraba State, Nigeria 2021-09-14T02:30:11+00:00 O. O. Sobola D. O. Oke A. G. Adedayo J. A. Olusola <p>The study investigated tree species composition, diversity and abundance in the Guinea savanna ecosystem, Taraba State, Nigeria. Three transects with a distance of 500 m apart were used for the study. Four sample plots of 25 m x 25 m size were laid in alternate positions along each transect at 250 m intervals. Identification of trees/shrubs was carried out in the forest reserves. Biodiversity indices such as; Shannon-Wiener diversity index, Species evenness, Simpson’s diversity index, Margalef’s richness index and Menhinick’s diversity index, were estimated at the end of the study. The result of floristic diversity assessment showed that the two forest reserves were able to conserve trees/shrubs species diversity. This was reflected by the value obtained for diversity indices for the two land use types: Shannon- Weinner (3.29, 3.08), species evenness (0.47, 0.49), Simpson (0.95, 0.93), Margalef (6.83, 6.49), Minhinck’s index (2.09, 1.79) for Sonkpa and Jabwanje forest reserves respectively. The density of fruit trees/shrubs encountered in the two forest reserves were (279, 414) which accounted for (47% and 56%) of the total woody population in Sonkpa and Jabwanje forest reserves respectively. Among the prominent fruit trees/shrubs encountered were <em>Nauclea latifolia, Gardenia aqualla, Annona senegalensis, Prosopis africana, Vitellaria paradoxa, Vitex doniana, Strychnos innocua.</em>&nbsp; However, the absence of <em>Irvingia gabonensis</em> and lower density of <em>Afzelia africana</em> was an indication that some important species are already going to extinction while others are endangered.&nbsp; Hence, the State government should, intensify the management of savanna forest by controlling the intensity of tree harvesting, stop illegal felling and encourage enrichment planting. Genetic improvement through germplasm collection and propagation studies should be carried out on the under exploited edible fruit species for genetically improved cultivars production.</p> 2021-09-10T06:51:32+00:00 ##submission.copyrightStatement## Effect of Environmental Factors on Apricot (Prunus armeniaca L.) Yield in the City of Jerusalem Occupied, Palestine 2021-09-16T02:27:23+00:00 Jehad M. H. Ighbareyeh <p>Apricot is a deciduous perennial tree, which classified within to the Rosacea family, sensitive to climatic factors, and its production has an economic role for many countries of the world, including Palestine. Mean annual temperatures and precipitation were analyzed, using data from a meteorological station of Jerusalem, Palestine, which has recorded between the year (1993-2012), and with the same number of years of apricot production, knowing that production data were taken from the Palestinian Statistics Center for the mentioned period. On the other hand, we used Professor Salvador Ravers Martins' methodology to classify the Earth in the process of analyzing environmental factors, there are two aspects of the factors: The first is climatic, which is the amount of rain or precipitation, mean monthly temperature and soil water reserve, and the second factor is the bioclimatic, which is annual ombrothermic index, simple continentality index, compensated thermicity index, and water deficit. In conclusion, Jerusalem was adversely affected by mean monthly temperature, precipitation, compensated thermicity index, deficit water, annual ombrothermic index during (1997-2002 and 2007-2012), but positively influenced by soil water reserve on apricot production, during (1993-1997 and 2002-2007), with a great rate of the variance in axis F1 (98.8%), axis F2 (0.82%) and symmetrical plot axes F1and F2 (99.8%), when the correspondence analysis was applied. However, humid areas characterized by mild summers are the suitable region for apricot production and productivity, with a temperature ranging between 22-24°C, at which high quality production can be obtained, the amount of rain is between 600 - 800 mm annually. Final, environmental regions in the thermomediterranean and the Mesomediterranean, with simple continentality index is 17 - 22, annual ombrothermic index is 2.5, while the compensated thermicity index is about 250/420, to obtain the highest ideal production of apricots in Jerusalem, Palestine.</p> 2021-09-13T00:00:00+00:00 ##submission.copyrightStatement## Effects of Some Drying Methods on the Quality of Dried Nigerian Onion Varieties 2021-10-06T01:46:52+00:00 O. O. Oniya A.B. Fashina A.O. Adeiza O. Ogunkunle <p>This research aimed to study the effects of some drying methods on the qualities of dried Nigerian onion varieties. Sliced onion samples of 1.5kg from each variety were dried in the three dryers at varying pre-determined temperatures of 50, 60, and 70<sup>o</sup>C. At 50, 60, and 70<sup>o</sup>C, the electrically powered dryer dried red onion for 13.55, 12.10, and 10.30 h, dried white onion for 14.10, 12.25, and 10.55 h, and dried cream onion for 14.10, 13.15, and 11.35 h. The kerosene-powered dryer at 50, 60, and 70<sup>o</sup>C dried red onion for 14.45, 13.22, and 11.55 h, dried white onion for 14.50, 13.15, and 11.15 h, and dried cream onion for 14.25, 13.05, and 12.20 h. The solar dryer at 57<sup>o</sup>C dried red onion for 72.45, dried white onion for 72.20 h, and dried cream onion for 72.50 h. Therefore, using kerosene, solar, and electrically powered dryers significantly affects onion quality (constituents and flavor). However, the electrically powered dryer could attain the required temperature quickly and further maintained the temperature, which proved to be the best method for drying the onions at 70<sup>o</sup>C.</p> 2021-09-30T00:00:00+00:00 ##submission.copyrightStatement## Photosynthesis, Growth and Dry Biomass Production in Euglena gracilis Klebs as Affected by Three Growth Irradiance Levels 2021-10-09T02:54:14+00:00 C. K. Beneragama K. Goto V. N. Kodithuwakkuge <p><strong>Aims: </strong>The research aimed to investigate the shade response of <em>E. gracilis</em> Klebs while making the irradiance a crucial factor for photosynthesis based physiological activities and its applicability for industrial level culture conditions.</p> <p><strong>Study Design:</strong> <em>Euglena</em> was cultured at three different light intensities of 30, 90, and 210 mol m<sup>-2</sup>s<sup>-1 </sup>photoautotrophically and axenically in modified Cramer-Meyer medium at 25 ˚C as batch cultures.</p> <p><strong>Methodology:</strong> The photosynthesis O<sub>2</sub> evaluation of <em>Euglena cultures</em> was measured under exponential (EP), transitional (TP), and stationary phases (SP). The&nbsp;light compensation point (LCP), light saturation point (LSP), and dark respiration rate (DRR) were obtained.&nbsp;Cell volume and cell number in each culture were measured simultaneously. Cells were collected and obtained dry mass (DM) after drying aliquots at 80˚C. Specific growth rate (SGR) and relative growth rate (RGR) were calculated. Tests for homogeneity of variance were performed on all parameters and LSDs were used for the mean separation.</p> <p><strong>Results:</strong> In the TP, the lowest LCP was achieved in the higher light culture. The values of both the DRR and the LSP were the same as in EP. The DRR, LCP and LSP are lower in lower PFD cultures and decreased with increasing cell titers. The cellular growth levels were lower in lower light culture and decreased as each culture grew. Cellular DM was maintained constant in the EP, where SGR almost equaled RGR. In the EP, SGR was maintained constant in each culture, SGR displayed a saturation phenomenon. In the later TP, SGR became equal to RGR and all the cultures revealed constant DM.</p> <p><strong>Conclusion:</strong> <em>Euglena</em> photoautotrophic cultures can tolerate low light intensities. With the SGR and RGR behavior under the shade conditions, they can maintain the constant photosynthesis rate and constant dry matter level.</p> 2021-10-06T00:00:00+00:00 ##submission.copyrightStatement##