The main purpose of this study was to characterize and classify soils of Wolkite University research sites, Gurage zone, Ethiopia. In each five research sites, Wabe (RS1), Geche (RS2), Yefereze (RS3), Kotergedra (RS4) and Keratemo (RS5), representative pedons were opened and described. Almost all the pedons were deep (>150 cm) with argillic B horizons and had clay textural class. The pH of the surface soils ranged from strongly acidic (4.5) to moderately acidic (5.6). The soils had medium (2.60%) to high (3.84%) organic carbon content and very low (1.46 mg kg-1) to low (10.34 mg kg-1) available phosphorus. The status of cation exchange capacity (CEC) and base saturation were ranged from medium (23.15) to very high (66.32 cmolc kg-1) and low (33%) to high (99%), respectively. According to WRB classification, pedon RS1 was classified as Haplic Vertisols (Hypereutric) with USD equivalent of Typic Haplusterts. Pedons RS2 and RS3 were classified as Vertic Alisols (Hyperdysric), which is correlated with Ultisols (Typic Haplustults) in USDA classification. Pedon RS4 and RS5 classified as Vertic Luvisols (Hypereutric), which is correlated with Alfisols (Vertic Haplustalfs) in USDA classification. Generally, the soils of the research sites were acidic with low status of available phosphorus, which need amelioration of soil acidity and nutrient management.

Purpose. The main aim of the study was to assess land use land cover change detection (LULCC) from 1990 to 2016 in case of Gibe Sheleko National Park (GSNP), Southwestern Ethiopia. Methodology / approach. Multi-temporal Landsat images and topographic map were acquired in 2016. Field observation using GPS was carried out to generate the ground truth points for image classification and accuracy assessment from December 2016 to June 2017. A total 200 GPS points were purposively collected. The data were analysis by using ERDAS IMGINE 2010 and ArcGIS 10.3.1 software. Supervised classification was carried out to identify the overall land use land cover class. Results. Forest land was rapidly declined with average of 478.5 ha/year for the last 27 years. This revealed that over 66.8% of forest was diminished from 1990 to 2016 due to anthropogenic factors in the study area. Bush & shrub land was upraised from 12600 ha (31.5 %) to 20600 ha (51.5 %) from 1990 to 2016. Grazing land and bare land was also showed an increment of 3500 ha and 2240 ha with average increment of 134.6 ha/year and 86.5 ha/year respectively from 1990 to 2016. This indicated as most forest land was changed in to bush & shrub land due to human induced factors. Hence, it brings negative effects on the wildlife conservation and socio-economic development. Originality / scientific novelty. This study is orginal research finding by employ above indicated methedology and stated the last 27 years land use land cover change of Gibe Sheleko National Park for fist time. It also discovered that the rate of land use land cover change in the study area for the past 27 years. Practical value / implications. The main results of the study of land cover change can be used to ensure planning to be sustainable and integrated management of the natural resources. Participatory management practice should be implemented in the study area to regenerate the changed land use type.

Land use/land cover change is a general term for the modification and conversion of the earth's surface by human and natural factors. Land cover is the physical and biological cover of the surface. Land use covers the results of human activities for the exploitation of it. The objective of this study was to detect land cover/use changes in Andasa Watershed between the years 1995 to 2015. The study has used ArcGIS10.1 and ERDAS IMAGINE 2010, land sat images of 1995 and 2015 and socioeconomic data to analyze land cover and landuse changes of Andasa watershed. The study has found that due to the population increase and improper agricultural activity forest and bush lands have declined whereas farm and bare lands expanded between the study years. Forest land and shrub land jointly decreased by 14349.23 hectare which is 23.87% of the total watershed area, whereas, cultivated land and bare land jointly increased by16010.32 hectare of land which is 26.63% of the total watershed area between the study periods, respectively. The rapid expansion of croplands and bare lands were entirely attributed to the alarming rate of depletion of forests, woods and shrubs. There is an urgent need to limit the population growth rate and implementing appropriate land use policy in the Andasa watershed.