Enyew Adgo

• Bahir Dar University

Maize holds a key role in ensuring food security in Ethiopia, yet its productivity faces challenges due to water scarcity and soil acidity. Minimizing these problems is crucial to enhance maize yield and maintain food security. This research explored the effects of deficit irrigation (DI) combined with lime, manure, and inorganic fertilizer applica...

This study explores the integration of local knowledge and scientific soil classification to advance sustainable agricultural practices in the highlands of Northwestern Ethiopia. The research provides insight into the valuable alignment of traditional observations with scientific analyses, leveraging the extensive, culturally embedded soil knowledg...

Improved governance arrangements are central in strengthening value chains with sustainable, resilient farming and healthy nutrition. This study explored governance arrangements important to the vegetable value chains in Food System Labs in Bahir Dar (Ethiopia) and Cotonou (Benin). The study collected data through face-to-face interviews from diffe...

Purpose To mitigate erosion, soil and water conservation measures have been introduced widely, with the ambition to reduce on-site erosion rates and catchment sediment yield. However, the success of such measures has been questioned, and often lacks a scientific basis. This is especially true in Ethiopia where gullying has been reported to worsen b...

Onion is the most important and widely cultivated cash-generating crop in Ethiopia. Onion production is limited by several factors, and its production and productivity are low. Among the many contributing factors, a lack of improved cultivars and improper plant density are the major limiting factors. This study addressed the critical challenges of...

Following land degradation and the associated reduction in crop production, smallholder farmers in the highlands of northwestern Ethiopia have recently practiced Acacia decurrens ‐based fallow system. Despite the rapid expansion of this new cropping system, its effect on soil properties and crop productivity has never been exhaustively studied. We...

To asses Impact of the informal seed system on the production of the malt barley in Ethiopia. The study purposefully selected seed samples from each of the two zones, Awi and South Gondar, using 60 sample homes and farmers. From every sample, 1000 g of malted barley seeds were taken for investigation of seed quality. The results indicate that Farme...

Soil nutrient depletion has been the greatest concern for decades for Ethiopian agriculture. The most important soil physico-chemical properties are below the critical level to support crop growth. Inappropriate crop and soil management practices are the causes of soil depletion. Overlaying of synthetic fertilizer, removal of crop residue, continuo...

Onions are among the most important cash crops in developing countries, including Ethiopia. However, its production and productivity are very low, which is associated with inappropriate fertilization and the use of low-yielding varieties. Therefore, the present study was conducted to evaluate the effects of the nitrogen fertilizer rate on the growt...

Spatially distributed water balance model WetSpass was chosen to estimate spatial and temporal recharge and evapotranspiration of Mt. Guna. Field based data and remote sensing data were used to successfully run WetSpass Model. The observed meteorological input data were corrected to minimize topographical effect by developing a regression equation,...

Soil erosion by water and inappropriate land management practices result in poor agricultural production in the highlands of Ethiopia. Cover crops (CCs) are a promising cropping system to ameliorate soil health and agricultural production. A field plot experiment was carried out during the rainy seasons of 2019 and 2020 to assess the effects of CCs...

Soil erosion by water and inappropriate land management practices result in poor agricultural production in the highlands of Ethiopia. Cover crops (CCs) are a promising cropping system to ameliorate soil health and agricultural production. A field plot experiment was carried out during the rainy seasons of 2019 and 2020 to assess the effects of CCs...

The objective of this study is to evaluate how soil bunds affect important soil characteristics based on soil reflectance in Kecha, a midland in the Ethiopian Abay River Basin. Soil samples were taken from 48 plots at 0–30 cm depth and were analyzed for soil texture, pH, organic carbon (OC), total nitrogen (TN), available phosphorus (av. P), and po...

Soil degradation exacerbates the depletion of soil resources and poses a threat to agricultural productivity and environmental sustainability. To address this issue, initiatives focusing on soil and water conservation (SWC) were carried out in the Tana Basin watershed located in Ethiopia. However, their spatial distribution, status, and effects of...

Information on the spawning migration and habitat use of migratory fish is critical to protect and restore threatened or endangered populations. Twenty-two individuals of three species, namely Labeobarbus platydorsus, L. megastoma, and L. truttiformis, were implanted with radio tags to study their spawning migration in the Gumara River and its trib...

Hot pepper (Capsicum annum L.) is one of the most important vegetable crops produced in Ethiopia. However, production and productivity of the crop is far below the world average, which is mostly associated with soil fertility depletions as a result of inappropriate application of fertilizer. Therefore, this field experiment was conducted to evaluat...

This study investigates the impacts of rock fragment cover (RFC) and soil amendments (polyacrylamide (PAM) + lime (L) and Manure + Lime), individually and in combination, on soil moisture, surface runoff and soil loss. Worldwide, the effects of different RFCs on soil erosion are properly evaluated. However, there are few published studies on the ef...

Introduction Onion is a significant vegetable crop in Ethiopia, serving as a source of income for smallholder farmers. However, various challenges in the production and post-harvest handling processes impede a consistent supply and marketing of the crop. This study focused on a comprehensive analysis of the onion supply chain, ranging from producti...

The effects of soil amendments on soil respiration (SR) rate have not yet been fully evaluated. In the Upper Blue Nile Basin, Ethiopia, we investigated seasonal variations in SR rates between and within soil amendments. We set up 24 plots with 8 treatments—polyacrylamide (PAM), gypsum (G), biochar (B), lime (L), control (C), PAM + L, PAM + G, and P...

Short‐term in situ charcoal production‐induced changes in soil properties and crop productivity of acidic soil in Acacia decurrens ‐based taungya system were assessed in the Guder watershed of northwestern Ethiopia. Data were collected through field study, pot experiment and interviews with local farmers. The field study involved a survey of 36 pai...

Nutrient balance analysis provides essential information concerning the current nutrient status of the soils and used to take appropriate nutrient replenishment practices. Nutrient flows were analyzed in Enqulal watershed of Dera district, Northwestern Ethiopia in the cropping season of 2018. Direct measurement and empirical formulas were used to i...

Erosivity is an important component in soil erosion modeling, and it is highly influenced by the kinetic energy of raindrops. However, little research has been conducted on the characterizing and modeling of the kinetic energy and erosivity of rainfall events using measured drop size and velocity in the highlands of Ethiopia. The aim of this study...

Agricultural sustainability and land degradation can be monitored through studying soil nutrient dynamics. This study was conducted to investigate the balance and stocks of nitrogen (N) and phosphorus (P) under major land use types and land management (LM) practices in three contrasting agro‐ecological environments in Ethiopia. We employed a nutrie...

This study determined the most effective plating density (PD) and nitrogen (N) fertilizer rate for well-adapted BH540 medium-maturing maize cultivars for current climate condition in north west Ethiopia midlands. The Decision Support System for Agrotechnology Transfer (DSSAT)-Crop Environment Resource Synthesis (CERES)-Maize model has been utilized...

Crop yield prediction before harvest is a key issue in managing agricultural policies and making the best decisions for the future. Using remote sensing techniques in yield estimation studies is one of the important steps for many countries to reach their agricultural targets. However, crop yield estimates rely on labor-intensive surveys in Ethiopi...

The aim of this study was to determine how soil bunds affected important soil characteristics based on the soil's reflectance in Aba Gerima, an Ethiopian midland of the Abbay River Basin. Soil samples were collected from 0 to 30 cm of the soil depth in 48 plots for soil texture, pH, organic carbon (OC), total nitrogen (TN), available phosphorus (av...

In most water balance studies, basins are considered closed systems; however, interbasin groundwater flow (IGF), which is an unaccounted hydrological component in most studies, could occur at basin boundaries where there is a hydraulic gradient and appropriate permeability of the geologic formations. IGF is a complex hydrogeological process and hid...

Spatiotemporal studies of the annual and seasonal climate variability and trend on an agroecological spatial scale for establishing a climate-resilient maize farming system have not yet been conducted in Ethiopia. The study was carried out in three major agroecological zones in northwest Ethiopia using climate data from 1987 to 2018. The coefficien...

Ecosystem services (ES) are the connection between nature and society, and are essential for the well-being of local communities that depend on them. In Ethiopia, church forests and the surrounding agricultural matrix supply numerous ES. However, the ES delivered by both land use types have not yet been assessed simultaneously. Here we surveyed bot...

Environmental transformations are the results of land-use and land-cover (LULC) changes. This study aims to investigate the LULC changes and associated factors in the Este District in northwestern Ethiopia, for the last four decades (the 1980s to 2020s). The land-use and land-cover classes were analyzed using supervised classification techniques in...

Pesticide use has increased in the Lake Tana sub-basin due to increased agricultural activity, potentially endangering nontargeted organisms. To assess its potential impact on fish health and fish-consuming human populations, pesticide concentrations in the fillet and liver tissue of three fish species, namely Labeobarbus megastoma, Labeobarbus tsa...

Understanding the dependence of soil respiration (Rs) on land use can improve our understanding of global carbon dioxide fluxes and provide useful information for designing land management options. In this study, we examine the spatiotemporal variability of Rs and the factors that influence it. Mean Rs was significantly higher (p < 0.05) in the tef...

This guideline was produced by the SATREPS-Ethiopia Project, which was jointly funded by the Japan International Cooperation Agency (JICA) and the Japan Science and Technology Agency (JST). It has been the flagship project of Bahir Dar University and ARARI (the Amhara Agricultural Research Institute) and has contributed greatly to capacity build...

ይህ መመሪያ በሳተሬፕስ-ኢትዮጵያ ፕሮጀክት በጃፓን ዓለም አቀፍ ትብብር ኤጀንሲ (JICA) እና በጃፓን የሳይንስና ቴክኖሎጂ ኤጀንሲ (JST) የጋራ የገንዘብ ድጋፍ የተዘጋጀ ነው። ፕሮጀክቱ የባህር ዳር ዩኒቨርሲቲ እና የአማራ ክልል ግብርና ምርምር ተቋም ዋና ፕሮጀክት ሲሆን በአቅም ግንባታ፣ በምርምር እና በልማት ስራዎች ላይ ትልቅ አስተዋፅኦ አድርጓል። ፕሮጀክቱ በርካታ ዘላቂ የመሬት አያያዝ (SLM: ኤስ ኤል ኤም) ቴክኖሎጂዎችን በሦስት የመሬት አጠቃቀም ዓይነቶች (የእርሻ መሬት፣ የሳር መሬት፣ እና የተራቆቱ ኮረብታዎች) ላይ የአፈር መሸርሸርን በመ...

Soil erosion has become a worldwide problem that threatens the environment and the future of economic and social development. The purpose of this study is to investigate the contribution of steep slopes and gullies to erosion in high precipitation tropical areas of the Ethiopian highlands. A trapezoidal weir was installed at the head and tail of th...

Maize is one of the most important cereal food crops, and it can be grown all year in various agroecological zones. However, its vegetative growth and yield are susceptible to rainfall and temperature variability. As a result, the analysis of rainfall and temperature variability and trend was urgently needed in maize-growing agroecology zones to re...

dry land dry matter yield herbaceous species natural pasture volatile fatty acid a b s t r a c t Grazing land remains the major feed source for livestock for smallholder farmers in Ethiopia; however , its productivity is low and it is prone to degradation. A field experiment was conducted to evaluate the effects of farmyard manure (FYM) and enrichm...

Food and nutrition security is not only addressed by increasing production alone, it should also ensure by reducing food loss. Onion has a great contribution to both economic and health issues, however, its production and productivity in the country is low. Thus, the study was initiated to identify multiple constraints on onion production and posth...

Changes in peak flow response time governed by rainfall and physical configurations of watersheds have been the topic of many studies, but other factors are also important. We aimed to analyze the dynamics in the lag time (TL) of peak flow for a tropical watershed (Kecha) and its sub-watersheds (Dokmit, Zenjero Maderia, and Wotit Minch) in Ethiopia...

Managing soils for improved agricultural production requires information on soil fertility status. Our objective was to map for better soil management in Ethiopia and determine their spatial correlation at a separation distance of 29 m. We collected 82 soil samples (0–20 cm depth) at 560 ha of land and determined pH, Olsen extractable phosphorus (O...

In the Ethiopian Upper Blue Nile Basin, like in other regions in the world, agricultural productivity is declining due to water scarcity owing to longer dry seasons coupled with soil acidity−induced fertility problems. Wheat is one of the major food security crops in Ethiopia but its productivity is reduced due to water scarcity, especially during...

Climate extreme events have been observed more frequently since the 1970s throughout Ethiopia, which adversely affects the socio-economic development of the country, as its economy depends on agriculture, which, in turn, relies heavily on annual and seasonal rainfall. Climate extremes studies conducted in Ethiopia are mainly limited to a specific l...

Owing to growing uncontrolled land-use change and urban expansion, farmers in urban fringes are struggling to sustain their livelihood. Farmers have been expressing their dissatisfaction at different times. This study analyzes the stakeholders’ perspectives on the causes and outcomes of farmers’ resistance to land-use change and urban expansion pro...

Data from remote sensing devices are essential for monitoring environmental protection practices and estimating crop yields. However, yield estimates in Ethiopia are based on time-consuming surveys. We used Sentinel-2, spectroradiometeric, and ground-truthing data to estimate the grain yield (GY) of two major crops, teff, and finger millet, in Ethi...

dry land dry matter yield herbaceous species natural pasture volatile fatty acid a b s t r a c t Grazing land remains the major feed source for livestock for smallholder farmers in Ethiopia; however , its productivity is low and it is prone to degradation. A field experiment was conducted to evaluate the effects of farmyard manure (FYM) and enrichm...

Floodplain sediment storage is an important component of a catchment’s sediment budget. Here, we present the first quantification of floodplain sediment storage for tropical river catchments draining to Lake Tana, NW Ethiopia. The catchments are characterized by relatively gently sloping to flat lowlands towards the lake (1788 m a.s.l.) and steeper...

Land degradation is primarily caused by accelerated soil erosion rate, which results in a loss in soil fertility and agricultural production. An improved understanding of the effect of soil bund spacing is a precondition for sustainable land management practices on sloping highlands. We examined the effects of bund spacing on soil loss, runoff, and...

This study assessed quantitative and qualitative postharvest loss of tomato through the supply chain in Northwest Ethiopia using FAO load tracking method. The treatments comprised of four critical steps through the supply chain and three harvesting locations. Two-way ANOVA was used to estimate the combined contributions of harvesting location and s...

Soil erosion by water is a major cause of land degradation in the highlands of Ethiopia and anywhere else in the world, but its magnitude and variability are rarely documented across land uses and climatological conditions. The purpose of this study was to examine runoff and soil loss responses under cropland (CL) and grazing land (GL) management p...

Pesticides are widely used for safeguarding agricultural yields and controlling malaria vectors, yet are simultaneously unintentionally introduced in aquatic environments. To assess the severity of this pressure in the Lake Tana Basin (Ethiopia), we evaluated the occurrence of 17 pesticide residues in the lake, tributary rivers, and associated wetl...

The temporal dynamics of soil respiration change in response to different land management practices are not well documented. This study investigated the effects of soil bunds on the monthly and diurnal dynamics of soil respiration rates in the highlands of the Upper Blue Nile basin in Ethiopia. Six plots (with and without soil bunds, three replicat...

This paper analyzes the impact of urban land-use changes on farmers' livelihood around the city of Bahir Dar (Ethiopia). Rapid urban expansion in and around the city has resulted in massive land-use changes in its urban fringes, with land expropriation programs affecting communities' livelihood and the environment. A survey was conducted in three u...

Rapid soil properties monitoring and modeling are crucial for sustainable soil management interventions. The analysis of soil properties in the laboratory using standard procedures is time-consuming and requires the use of chemicals. The research aimed to develop a regression model based on the visible-near-infrared-short-wave infrared (Vis-NIR-SWI...

Pesticides are widely used for safeguarding agricultural yields and controlling malaria vectors, yet are simultaneously unintentionally introduced in aquatic environments. To assess the severity of this pressure in the Lake Tana Basin (Ethiopia), we evaluated the occurrence of 17 pesticide residues in the lake, tributary rivers, and associated wetl...

In developing countries like Ethiopia, where the time of harvesting coincides with the dry season, farmers cure onion bulbs naturally on the field. Field curing generally takes longer than artificial curing and results in more losses and reduced quality of the bulbs due to increased risks for infestations and uncontrolled suboptimal drying conditio...

The tributary rivers of Lake Tana are important nursery grounds for larvae and juveniles of the migratory endemic Labeobarbus species, but very little is known about their functional habitat and feeding preferences. This study investigated nursery grounds, habitat shifts, and potential energy sources for juvenile Labeobarbus species. Electrofishing...

Integrating farmyard manure (FYM) and legume intercropping improves soil chemical and microbial properties, thereby increasing forage productivity and nutritional value. The purpose of this study was to evaluate how fertilizer treatments affected the chemical composition, in vitro gas production and organic matter digestibility (IVOMD), and volatil...

Abstract Currently, the government of Ethiopia is supplying fertilizers containing N, P, S, Zn & B. However, many researchers argued that N and P are the only yield-limiting nutrients. The current study was conducted to identify yield-limiting nutrients for tef and to assess the inherent nutrient supplying status of Vertisols. The experiments were...

The aquatic plants in wetlands have been threatened by increasing human disturbances in recent decades. The present study investigates to what extent human disturbance affects the community composition and richness of aquatic plants in 3 different wetland types in Lake Tana, Ethiopia. We selected twelve wetlands representing 3 different wetland typ...

Study region This study is performed for the volcanic aquifers of semi-humid Lake Tana basin in northwest Ethiopia, the source region of Blue Nile basin. Study focus estimating groundwater recharge at required spatial and temporal scale is a challenge in groundwater management, sustainability and pollution studies. In this study, the physically-ba...

An accurate crop yield forecast at a reasonable cost is required for increasing production and securing food. Therefore, spectral reflectance was measured with a spectroradiometer (λ 350–2500 nm) to predict grain yield (GY) and aboveground biomass yield (ABY) of teff and finger millet in Ethiopia. We calculated six spectral vegetation indices (SVIs...

The temporal dynamics of soil respiration change in response to different land management practices is not well documented. This study investigated the effects of soil bunds on the monthly and diurnal dynamics of soil respiration rates in the highlands of the Upper Blue Nile basin in Ethiopia. Six plots (with and without soil bunds, three replicate...

Crop yield prediction provides information to policymakers in the agricultural production system. This study used leaf reflectance from a spectroradiometer to model grain yield (GY) and aboveground biomass yield (ABY) of maize (Zea mays L.) at Aba Gerima catchment, Ethiopia. A FieldSpec IV (350–2,500 nm wavelengths) spectroradiometer was used to es...

Cover management and support practices largely control the magnitude and variability of soil erosion. Although soil erosion models account for their importance (particularly by C- and P-factors in the Revised Universal Soil Loss Equation), obtaining spatially explicit quantitative field data on these factors remains challenging. Hence, also our ins...

Polyacrylamide (PAM) mitigates soil nutrients depletion and increases nutrient utilization, however, the effect of PAM combined with other amendments were not tested at field condition. Objective of the study was, therefore, to identify the best combination of amendments that can improve soil nitrogen (N) and phosphorus (P) balances while maximizin...

The aim of this study was to determine postharvest loss of tomatoes along the postharvest supply chain in Northwest Ethiopia. The study was conducted on tomato fruits produced in three productive kebeles (Chimba, Gumara, and Kudmi) of Northwest Ethiopia following the FAO load tracking and sampling assessment method. Postharvest losses of tomatoes r...

In Ethiopia, soil fertility problem caused by acidity substantially limits agricultural productivity, necessitating sustainable integrated nutrient management. This study assessed the effect of combined application of lime, manure and inorganic fertilizer on selected hydrophysical properties of an acid clay Nitisols in the Koga irrigation scheme, E...

Geotourism is a sustainable type of tourism that focuses on the geological and geomorphological heritages of an area, and the associated cultural and biodiversity features. Though the popularity of geotourism is rapidly growing, research on the demand side, particularly on segmenting tourists to geosites and understanding their profiles, is limited...

Plankton is an integral part of wetland biodiversity and plays a vital role in the functioning of wetlands. Diversity patterns of plankton in wetlands and factors structuring its community composition are poorly understood, albeit important for identifying areas for restoration and conservation. Here we investigate patterns in local and regional pl...

Bread wheat is one of the most important staple crops in Ethiopia and it is largely produced by smallholder farmers in the highlands of the country. Its productivity is, however, very low below the world average mainly due to the dwindling of soil productivity and depletion of soil fertility as the result of complete removal of crop residues as wel...

Severe soil degradation and fertility depletion have resulted in poor soil health and low crop productivity in the cultivated land of most Ethiopian highlands. Thus, a three-year experiment from 2013 to 2015 was conducted to assess the potential of crop rotation and organic matter application for recovery of the soil health and crop productivity of...

Mitigating soil nutrient depletion and increasing utilization efficiency is a prerequisite of sustainable agriculture. Therefore, a field experiment was carried out for 2 years in the midland agroecology of Ethiopia, to identify soil amendment types that can improved soil nitrogen (N) and phosphorus (P) balances at the same time maximize utilizatio...

Based on the efficiency of applied nutrients and land use there is no fertilizer rate recommendations for finger millet-common bean cropping systems. A field experiment was conducted in Northwestern Ethiopia on nitrogen (N), phosphorus (P) and land use efficiency in finger millet and common bean cropping systems. Factorial combinations of three cro...

Citation: Bayable, M.; Tsunekawa, A.; Haregeweyn, N.; Alemayehu, G.; Tsuji, W.; Tsubo, M.; Adgo, E.; Tassew, A.; Ishii, T.; Asaregew, F.; et al. Yield Potential and Variability of Teff