Agricultural Engineering Research Papers/Topics

EVALUATION OF BIOGAS PRODUCTION FROM PROSOPIS JULIFLORA LEAVES CO- DIGESTED WITH COW MANURE

Abstract: Biogas is eco-friendly alternative renewable energy source produced through anaerobic digestion of organic compounds. In this study, biogas production was evaluated from Prosopis juliflora leaves(PJ) and cow manure (CM) co-digestion in five mix ratios under mesophilic conditions (38ºC) using batch digesters in the Botany Laboratory of Haramaya University to evaluate biogas production potential of Prosopis juliflora leaves through anaerobic digestion alone or in combination with co...

BIO-ETHANOL PRODUCTION FROM TEFF (Eragrostis tef) STRAW USING YEAST (Saccharomyces cerevisiae) AS A FERMENTING AGENT

Abstract: Bio- ethanol is suggested as a sustainable fuel which can be produced from renewable resources and reduce the level of greenhouse gases. Therefore, this study was focused on producing bio ethanol fuel from teff (Eragrostis tef) straws in batch fermentation using yeast (Saccharomyces cerevisiae). Fifty grams of acid pretreated and untreated teff straw were incubated with10ml of 1% of yeast under three different temperature (20℃, 30℃ and 40℃) treatments and allowed to ferment o...

PRODUCTION OF BIOGAS FROM WILD SAGE (Lantana camara) CO-DIGESTED WITH COW DUNG

Abstract: Biogas is a clean and renewable form of energy and well substitute for conventional sources of energy especially in the rural sector. In response to the need for addressing the adverse impacts of the increasing trend in biomass energy consumption in Ethiopia, the last three recent decades development of more efficient cooking stove technologies and alternative sources of household energy had been realized. The aim of this study was to determine the optimal mix ratio for biogas prod...

EVALUATION OF BIOGAS YIELD FROM Vernonia amygdalina (Grawa) LEAVES CO-DIGESTED WITH COW DUNG UNDER ANAEROBIC CONDITION

Abstract: Biogas is an alternative renewable energy sources and a mixture of different gases, mainly methane and carbon dioxide, resulting from anaerobic digestion of organic matter. In this study, production of biogas from Vernonia amygdalina leaves co-digested with cow dung in anaerobic condition were evaluated under mesophilic condition at 38ºC using a batch mode digester. Biogas production was evaluated from treatments with different mix ratios A (100%VA) B (75%VA+25%CD), C (75%CD+25%VA...

EVALUATION OF BIOGAS YIELD FROM AVOCADO (Persea americana M.) PEEL WASTE CO-DIGESTED WITH GOAT MANURE

Abstract: Biogas is a well-established fuel that can replace firewood and electricity as an energy source for cooking, lighting, heating and for other purposes in developing countries. Moreover, biogas is a clean, environmental friendly and renewable form of energy generated when micro-organisms degrade organic materials in the absence of oxygen. The aim of this study was to evaluate biogas production potential of avocado fruit peel wastes and goat manure in combination or separately under a...

EFFECT OF VARYING TOTAL SOLIDS ON THE YIELD OF BIOGAS FROM Datura stramonium LEAVES THROUGH ANAEROBIC CO-DIGESTION WITH COW MANURE

Abstract: Production of biogas through anaerobic digestion of organic waste materials provides an alternative environmentally eco-friendly renewable energy. In this study, biogas production from co-digestion of cow manure (CM) and Datura stramonium leaves (DSL) in five mix ratios (100%CM, 60%CM:40%DSL, 50%CM:50%DSL, 40%CM:60%DSL and 100%DSL) were evaluated under mesophilic condition at 38ºC using a batch mode digester over 30 days fermentation. In all the treatments, physico-chemical parame...

EFFECT OF SITE-SPECIFIC FERTILIZER APPLICATION ON SELECTED SOIL PHYSICOCHEMICAL PROPERTIES AND MAIZE (Zea mays L.) YIELD IN MIKALANGO EXTENSION PLANNING AREA, SOUTHERN MALAWI

Abstract: Malawi’s economy is solely agricultural driven, yet the soils are continuously depleted of major nutrients threatening economic development, food and nutrition security. Besides poor agricultural practices, climate change is one of the major factors exacerbating soil and nutrient degradation in sub-Saharan Africa. Use of blanket fertilizer recommendations to nourish the depleted soils is worsening the situation as it often not matches with the requirement of the soil and maize, t...

DESIGN, CONSTRUCTION AND PERFORMANCE EVALUATION OF ENGINE DRIVEN WARQE/ENSET (Enset ventricosum) DECORTICATOR

Abstract: Warqe/enset processing is carried out dominantly by rural women using traditional tools such as bamboo scraper, serrated wooden tool and metal knife where losses in quality and quantity are exceptionally high. Above all, the traditional way of warqe/enset processing causes to much physically drudgery among the rural women. In an effort to alleviate the problem, an engine driven warqe/enset decorticating machine was designed, constructed, tested and evaluated. The performance evalua...

IMPACT OF SMALL-SCALE IRRIGATION USE ON HOUSEHOLD VEGETABLE PRODUCTION AND FOOD SECURITY: THE CASE OF SODDO DISTRICT, GURAGE ZONE, SOUTHERN ETHIOPIA

Abstract: For most Ethiopian rural households, food insecurity has been the most critical concern. Small-scale irrigation is among the first measures in increasing vegetable production, diversifying household assets and income, and improving household food security. This study measured the impact of small-scale irrigation use on household vegetable production and food security using outcome indicators of household food consumption score, household dietary diversity score and yield of onion. ...

FARM SYSTEM CHARACTERIZATION, RICE YIELD DRIVERS, FARMERS’ PERCEPTION TO CLIMATE CHANGE AND ADAPTATION, CLIMATE ANALYSIS, AND DRY SPELL MANAGEMENT OF RAINFED RICE (Oryza sativa L.) IN THE FOG

Abstract: Rice is one of the most important cereal crops in Fogera Plain. Despite its potential and production in Ethiopia, its productivity varies from year to year and over locations due to seasonal and intra-seasonal climate variability and household characteristics. The objectives of this study were to identify rice farm typologies, drivers of rice yield, climate change, and adaptation strategies to analyze climate variability and trend changes, and to assess dry spell management practic...

ADOPTION OF IMPROVED TURMERIC VARIETY BY SMALLHOLDER FARMERS IN YEKI DISTRICT, SHEKA ZONE,SOUTHERN ETHIOPIA

Abstract: The significance of spice technology in enhancing production and productivity can be realized when yield increasing technologies are extensively used and diffused.This research addresses the case of improved turmeric variety that has been intensively promoted in major producing area to enhance the level and degree of technology use among smallholder farmers.Hence,in this study, an attempt was made to examine factors affecting adoption and intensityof use of improved turmeric variet...

Determinants of Renting-in Threshing Machine and Its Impact on Sorghum Threshing Cost: The Case of Haramaya District, East Hararghe Zone, Oromia Regional State, Ethiopia

Abstract: The purpose of this study was to identify and evaluate determinant factors of renting-in threshing machine and the impact of machine renting-in service on reduction of threshing cost of the household. To address the objectives the study used cross-sectional data collected from 180 machine users and non-users households in Haramaya district. Sample size of respondent from each selected two kebeles was determined using probability proportional to size sampling technique. The sample f...

FACTORS AFFECTING ADOPTION DECISION OF WHEAT ROW PLANTING TECHNOLOGY: THE CASE OF AGARFA DISTRICT, BALE ZONE OF OROMIA NATIONAL REGIONAL STATE, ETHIOPIA

Abstract: Ethiopian economy is highly dependent on agriculture, especially crop production takes the major share in economic growth. Hence, supporting the sector through introducing new agricultural technologies, like row planting technology is crucial. However, application of better technologies remained low in Ethiopia and also in the study area due to several factors. Therefore, study was to assess the status of adoption decision of wheat row planting technology and identify factors affec...

RESPONSES OF TEF [Eragrostis tef (Zucc.) Trotter] VARIETIES TO BLENDED NPSB FERTILIER RATES AT GELAN, CENTRAL ETHIOPIA

Abstract: Tef is the major crop grown in Ethiopia and the study area. However, its productivity is low mainly due to limited use of improved varieties and low soil fertility as result of intensive soil erosion and long history of cultivation. Therefore ,a field experiment was carried out on a farmer’s field at Gelan Akaki district during the 2018 main cropping season (from July to November 2018) to assess the response of tef varieties to blended NPSB fertilizer rates and to identify the ec...

COMPARATIVE EVALUATION OF A SOLAR POWERED INCUBATOR WITH THE MODERN ELECTRIC INCUBATOR

Abstract: In a rural part of many developing countries including Ethiopia; it is difficult to use modern incubator due to shortage of electricity and high initial capital as well as operating cost. Therefore, this experiment was conducted at Haramaya University poultry farm, Eastern Ethiopia to develop a solar powered incubator and compare its performance and profitability with the modern electric incubator. Solar powered incubator was developed and its performance was compared with modern e...


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