Archives - Page 3

• Changes in soil physicochemical properties and nutrient dynamics under liming acid soils Wakshuma Yadesa Mergo

  Vol. 6 No. 1 (2024)

  Area specific investigation of impacts derived from liming acid soils and the consequent effects on plant nutrient bioavailability and soil physicochemical properties is important. This work aimed at investigating dynamics of nutrient bioavailability and changes in soil physicochemical properties under liming acid soils in the west Wallaga zone of western Ethiopian high rainfall regions. Lime requirements were calculated for all soil samples using the acid saturation procedure. Then, important physicochemical properties of the soils and bioavailability of nutrients were determined following standard procedures. The highest changes observed as a result of liming were 36.59 to 37.19 cmol Kg⁻¹ for CEC, 0.97% to 0.47% for SOC, 1.76 to 1.40 g cm⁻³ for bulk density, 30.31 to 37.21% for porosity, 30.25 to 34.55 µS cm⁻¹ for EC, 2.56 to 0.26 cmol Kg⁻¹ for EA, and 0.08 to 0.02% for TN. This is attributed to the relatively higher CEC of clayey soils. It was observed that liming conditions, CEC, EC, EA, SOM, TN, and AP have significant (p < 0.001) correlations amongst themselves and with some other soil physicochemical properties such as porosity, bulk density, and C/N ratio. Bioavailability of P, N, S, Ca, K, and Mg were significantly positively (p < 0.01) enhanced by liming. This is due to improved mineralization of organic compounds, solubilization of some K, Ca, and Mg compounds, and input of Ca and Mg through liming. More research may be necessary to create a further understanding of the long-term effects of liming acidic soils on innate sources of nutrients and biological properties.

• ANTIBACTERIAL ACTIVITIES OF CRUDE EXTRACT OF CROTON MACROSTACHYUS LEAVES AND PURE COMPOUND (METHYL LAURATE) ISOLATED FROM IT

  Vol. 3 No. 1 (2020)

  Abstract
  Croton macrostachyus Delil belongs to one of the largest genera of the family Euphorbiaceae, called Croton under the subfamily Crotonoideae. The genus Croton is ecologically prominent, and an important source of secondary metabolites with antimicrobial properties in tropics and subtropics. The objective of this study was to test the antibacterial property of the leaf extract of Croton macrostachyus and a lauric acid derivative, Methyl Laurate, isolated from it. Crude extract was obtained through phytochemical screening using the solvent acetone.

• Ethnobotanical survey of traditional medicinal plants used to treat human ailments in Arero District, Borena Zone, Ethiopia

  Vol. 5 No. 2 (2023)

  Abstract

  Pastoralist communities have traditionally possessed extensive knowledge regarding the plants and grazing areas in their vicinity, acquired through continuous practice and meticulous observation. As members of the Borana pastoralist communities, the people residing in the Arereo District utilize a variety of plant resources found in their rangelands. In order to evaluate the traditional use of medicinal plants in treating human ailments in Arero District, Borena Zone, an ethnobotanical study was conducted. The primary objective of this study was to document the medicinal plants employed by the local community. Fifty-one key informants were purposefully selected to participate in the study. Data was obtained through the use of questionnaires, focus group discussions, and field observations. In the study area, a total of forty-four medicinal plant species belonging to thirty-six genera and twenty-four plant families, were identified and documented. These plants were reported to be used in the treatment of thirty-five different human ailments. Among the various plant parts used for medicinal purposes, roots were found to be the primary source of remedies (47.7%), followed by leaves (13.6%). Of the remedies documented, 59.7% were prepared for internal use, with oral consumption being the most common method (53.73%). Additionally, 40.3% of the remedies were intended for external applications. The decoction was the predominant method of remedy preparation, accounting for 41.8% of the remedies known in the study area. The findings indicated that the local community possessed valuable knowledge regarding the use, preparation, and application of medicinal plants for the treatment of human ailments. However, it was also noted that certain medicinal plants in the study area, such as Vachellia nilotica and Vachellia tortilis, were reported to be locally threatened. It is crucial to pay adequate attention to prevent further threats to these medicinal plants and to conserve them, along with the associated local knowledge. Efforts should be made to safeguard the medicinal plant resources in the study area, ensuring their sustainable use and preservation for future generations.

• Determinants of Farmers’ Decision to Use Improved Land Management Practice in Gindara Watershed, Southern Ethiopia

  Vol. 2 No. 2 (2019)

  Abstract
  The principal environmental problem in Ethiopia is land degradation in the form of severe soil erosion, gully formation and soil fertility loss. To overcome this problem, promoting appropriate land management technologies are best options. However, farmers’ decisions to use land management practices are determined by complex factor. Thus, this study was conducted in Gindara watershed with the objective of analyzing the status of farmers’ choice of improved land management practices and investigating determinants of farmers’ decisions to use improved land management practices.

• The Eco-cultural Shift in the Gede’o and Sidama Indigenous Agroforestry System

  Vol. 4 No. 2 (2022)

  Abstract

  The Gedeo and Sidama are neighboring communities well known in Ethiopia for their indigenous agroforestry system. Both communities have strong attachments to the indigenous agroforestry system. However, in recent years, there has been a dramatic change in the agroforestry system of both communities: a shift in the value system and economic engagements that reflects a departure from the culturally embedded local knowledge, belief, norms, and environmental ethics of regulating the human-nature relationships. This paper attempts to show the eco-cultural shift in the indigenous agroforestry systems of the Gedeo and Sidama communities. The paper specifically addresses the relationship between nature and culture, and their dynamics and the challenges related to the eco-cultural shifts in the everyday lives of the communities. Methodologically, qualitative research methods such as in-depth interviews, observation, focused group discussions; narrative interview and review of secondary sources have been employed to collect data. Purposive and snowball sampling techniques have been used to find key informants in the study areas. The results have shown that various factors such as disease to native crops, erosion of traditional social structures, urbanization, modernization, modern schooling and expansion of mainstream religions have been inducing adverse effects in the indigenous agroforestry system of Gedeo and Sidama communities. In addition, with the “monetization” of the production system in the area, the indigenous agroforestry system of the Gedeo and Sidama is now shifting towards cash-oriented cropping system. As a result, the communities have started to experience ecological, social and institutional challenges. Ecologically, the communities have started to experience loss of biodiversity, infertility of soil and food insecurity; socially, uncommon and abnormal behaviors such as beggary, snatching and prostitution are on the rise; institutionally, the decay of indigenous social institutions that preserved society-nature symbiosis is quite visible. The paper recommends necessary preventive measures to reduce drivers of eco-cultural shift in the indigenous land use systems of Gedeo and Sidama and their adverse effects on the harmonious relationship between society and nature in the areas.

• The Effect of Smallholder Farmers’ Managed Wetlands on Plants’ Diversity and Soil Properties in Gedeo Zone, Gedeb wereda, Southern Ethiopia.

  Vol. 2 No. 1 (2019)

  Abstract
  This study was conducted in southern Ethiopia to assess the impact of smallholder farmers’
  managed wetlands on plants diversity and soil properties. Vegetation data were collected from 60
  plots having (1m x1m) quadrats laid on five transects lines along the altitudinal gradient. Vegetation
  data were analyzed using, descriptive statistics, Sorenson’s similarity, and Shannon-Wiener
  diversity index and R. 2.14 software.