Taye Kufa

Ethiopian Institute of Agricultural Research | EIAR · Department of Agronomy

It is about the quality of Ethiopia's Arabica coffee produced in the Kaffa Biosphere Reserve across locations production systems and processing methods.

ECSS (2022). Sirawdink Fikreyesus Forsido, Getachew WeldeMichael, Esayas Mendesil, Gezahegn Berecha, Taye Kufa, and Kifle Belachew (Eds.). Proceedings of Ethiopian Coffee Science Society (ECSS): Coffee Science and Innovation for Climate Resilience and Sustainable Coffee Value Chain in Ethiopia. Second Biennial Conference of Ethiopian Coffee Science...

A comprehensive physical and cup quality assessment of coffee (Coffea arabica L.) has not yet been conducted on Kafa Biosphere Reserve coffees. Hence, the influence of location, production systems, and processing methods on coffee bean physical and sensorial qualities were studied to identify the inherent qualities and suitable preparation methods...

Major achievements, challenges and the way forward_ Ethiopian coffee research

In-depth forest coffee cup quality assessments have not been conducted yet on Kafa Biosphere coffees. Hence, the influence of location, elevation gradient, and processing methods on coffee bean physical and sensorial qualities, and the relationship between soil and coffee quality variables were studied in 2017. Districts (Gimbo, Gawata, and Decha),...

Leaf trait is good predictors of plant performance. It is closely associated with light requirement, growth and survival of the plant. This study was designed to evaluate the effect of seedling planting density and fertilizer rate on leaf traits variation of two Arabica coffee cultivars under nursery conditions. It was conducted at Jimma Agricultur...

Information on soil test and plant analysis is essential for sustainable soil fertility management and crop production. Conversely, this is lacking for smallholder coffee farms in Gomma district, Southwestern Ethiopia. Thus, the objectives of this study were to assess and determine the nutritional status of the soil-plant relation from coffee growi...

Coffee (Coffea arabica L.) is one of the major cash crops which were widely grown in west, south and south west parts of Ethiopia. There is wider genetic diversity in the country but the average clean coffee production is very low 0.7 ton/ha compared with other coffee producing countries. The low production was arises from erroneous management of t...

Wet coffee processing leads to the generation of large volumes of wastewater, whose discharge to the environment leads to pollution of freshwater bodies. Kayanza is a major coffee growing area in Burundi with more than 40 wet coffee processing factories (WCPF) that discharge effluents directly to receiving water bodies without treatment. This study...

Planting high density can reduce photosynthetic active radiation due to mutual shading or low light interception. The nature of the canopy and utilization of solar radiation influence the performances of coffee genotype. This study was designed to evaluate the effect of planting density and fertilizer rate on physiological parameters of Arabica cof...

Arabica coffee is cultivated by smallholders for commercial purposes, and it is commonly processed using wet Coffee Processing Technology. Burundi has more than 250 Coffee Processing factories which discharge their effluents to water bodies. The goal of this study was to determine the levels of physicochemical parameters in wastewater from Coffee...

A pot experiment was conducted to determine the effects of lime, coffee husk compost and their combinations on growth response of coffee (Coffea arabica L.) seedlings at Haru Research Sub-Center nursery site in West Ethiopia in 2016/17. The experiment was laid out in a factorial experiment arranged in Randomized Complete Block Design with three rep...

Coffee pea berry is a unique feature of coffee seed as the result of the berry producing a single bean instead of the normal two during fertilization at the field. This might happen due to three major factors i.e. failure in one of the two ovules in the ovary to be fertilized and set seed, failure in the further development of the endosperm and inc...

Coffee growing soil of southwestern region parts of Ethiopia are classified as Nitisols with having a low pH and highly deficient in phosphorus. A nursery experiment was conducted at Jimma Agricultural Research Center, southwestern Ethiopia to evaluate the effects of lime and phosphorus rates on coffee seedling growth under nursery conditions. The...

Declining soil fertility status and poor agronomic practices, including minimum use of inorganic fertilizers and inappropriate plant population are the major reasons for low productivity of soybean. A field experiment was carried out to determine the response of soybean to plant population and NP fertilizer in Kersa woreda of Jimma zone, south west...

Coffee quality can be affected by variety, climate and soil factor, field management practices and post-harvest handling and processing techniques. The study was undertaken in Dilla zuria and Yirgacheffee districts, representing the known Sidama Yirgacheffee coffee brands, respectively, in South National Nationalities Peoples' Regional State. The o...

Coffee quality can be affected by variety, climate and soil factor, field management practices and post-harvest handling and processing techniques. Arabica coffee (Coffee arabica L.) is an economically important crop, which is contributing the highest of all export revenues in Ethiopia. The study was undertaken in Dilla zuria and Yirgacheffee distr...

Getting more information on genetic variability is a prerequisite for further improvement of coffee (Coffea arabica L.). Although Ethiopia is known as a primary diversity for Coffea arabica the knowledge on nature and extent of variation of the coffee accessions has one of the major problems in coffee improvement program. Hence, to assess the natur...

Share experience on the uniqueness of Ethiopian coffees from Research aspect.

knowledge of nature and extent of genetic variation and diversity available in the germplam or breeding materials helps breeder for planning sound breeding program. Hence, the present investigation was undertaken to evaluate 47 coffee germplam accessions, which were collected from Gomma wereda of Jimma zone and two standard check varieties. The exp...

Information on genetic variability is a prerequisite for further improvement of the yield and quality of coffee. However, lack of information on genetic variability for specialty coffee accessions has been one of the major problems in coffee improvement program. Forty nine coffee (Coffea arabica L.) germplasm accessions, which were collected from G...

Arabica coffee genetic resources and shade-grown coffee landscapes are under threat largely due to human activities and lack of scientific information and understanding on adaptation mechanisms along environmental gradients. The study aims to describe the variability in early physiological growth responses in arabica coffee genotypes of varying geo...

High seed quality is essential for optimum stand establishment in Coffee. As a result, it is necessary to have seed physical, germination percent, physiological and health tests that permit rapid, objective and accurate evaluation of seed quality. This study evaluated the effect of storage time on physical, physiological, germination percent and he...

The present investigation was carried out to study the correlation and path coefficient analysis in 49 coffee (Coffea arabica L.) germplasm accessions, which were collected from Gomma district, at Agaro. Data on eight organoleptic quality traits were recorded by well experienced and trained coffee tasters. Character association of the quality attri...

Ethiopia is known as the center of origin and genetic diversity for Arabica coffee (Coffea arabica L.) that is widely produced, traded and consumed worldwide. The internationally known unique quality coffee production systems with enormous social, economic and environmental benefits are under continuous threat, largely due to population pressure, d...

The study was carried out to determine the variations among different Coffea arabica germplasm lines in hydraulic resistances under controlled nursery settings at the Jimma Agricultural Research Center in southwest Ethiopia. The experimental treatments included contrasting shade conditions (moderate shading v. full sunlight) and seedlings of 12 ara...

The study focused on assessing soil physical properties under natural coffee forest ecosystems in southeast and southwest Ethiopia. For this, the Harenna, Berhane-Kontir, Bonga and Yayu forest coffee soils were collected from three sub-sites and two soil depth ranges at each area. Hence, a total of 24 soil samples were analyzed for major soil physi...

The study was carried out with the objective to compare the variations in root growth characteristics of wild Coffea arabica populations in Ethiopia. A total of 24 wild coffee trees were used for in-situ root growth measurements under four natural coffee forests, viz., Harenna, Bonga, Birhane-Kontir and Yayu. Analysis of variance was performed to c...

The study was conducted with the aim of determining the variations in growth and hydraulic resistances and identifying the relationship between these traits in seedlings of Arabica coffee populations. Coffee accessions collected from four wild coffee forests in Ethiopia (Harenna, Bonga, Berhane-Kontir and Yayu) were ex situ evaluated under control...

Root characteristics of coffee seedlings were studied with the main objective to compare the variations among twelve Coffea arabica germplasm accessions under contrasting nursery environments at Jimma Research Center, southwest Ethiopia. Coffee seedlings from four wild coffee populations, namely, Harenna, Bonga, Berhane-Kontir and Yayu were ex-sit...

In Ethiopia, the natural forests with the occurrence of wild Arabica coffee gene pools are under constant threats, largely due to anthropogenic activities. The study was conducted to compare the variability among the wild arabica coffee genotypes in biomass assimilation and allocation patterns under varying light and irrigation conditions at the Ji...

The aim of this study was to characterized and to estimate the extent of genetic variation and character association of organoleptic quality attributes of Coffea arabica accessions from Limu (Jimma, Ethiopia). Forty nine coffee germplasm accessions which have little or no information about their genetic variability together with two checks were pla...

The aim of this study was to estimate the extent of genetic variation and association among yield and yield-related traits. Forty nine Coffea arabica accessions from Limu (Jimma, Ethiopia) were tested at Agaro Agricultural Research Sub Center, Ethiopia from 2004 to 2009 in simple lattice design with two replications. Variances component method was...

To estimate the extent of genetic diversity among Limmu Coffee collection, Coffea arabica accessions from Limu (Jimma) were planted in simple lattice design with two replications. Clustering of the 49 accessions for 22 quantitative characters was performed using the method of average linkage clustering strategy of observations. Genetic divergence b...

The montane rainforests of Ethiopia are the only places of origin and genetic diversity for Coffea arabica species. These natural forest areas with the occurrence of wild coffee gene pools are however under constant threats, largely due to anthropogenic activities. The study aims to determine the variability in plant compositions and growth of wild...

The study was carried out to determine the magnitude of genetic diversity among Coffea arabica germplasm accessions. For this, twenty-one native coffee germplasm collections of six geographical areas were used for the study. The coffee genotypes were field, established in 2002 at the Jimma Agricultural Research Center, southwestern using a randomiz...

In Ethiopia, despite the enormous wealth of genetic diversity the average national coffee yield remains low. This is largely attributed to the predominant use of traditional coffee varieties and husbandry practices. The Jimma Research Center (JRC) has released a total of 37 coffee varieties along with improved agronomic and processing techniques. H...

The study aims at determining the status of soil chemical fertility in four wild coffee forests of southeastern and southwestern Ethiopia. Accord-ingly, soil samples were collected from surface and subsurface depths at three sites within each forest and analyzed for soil chemical properties. The results depicted that the soils at the four coffee fo...

The study was conducted with the aim to compare the variability among the wild coffee germplasm accessions in diurnal leaf water potential (LWP, ΨL) under contrasting shading and irrigation environments. Twelve coffee accessions were evaluated under two shading (moderate shading and full sun radiation) and irrigation (well watered and water stresse...

The study was carried out with the objective to investigate the variations among Coffea arabica L. accessions in water conductance under contrasting nursery environments at the Jimma Agricultural Research Center, southwestern Ethiopia. The treatments included two shade (moderate shading and full sunlight) and two irrigation (well watered and water...

The montane rainforests of Ethiopia are the only known centres of origin and genetic diversity for Coffea arabica . However, the remnant coffee forest environments with the spontaneously grown wild coffee populations are under continuous threat of genetic erosion, largely due to anthropogenic activities. The study was conducted with the objective t...

This study was conducted in Gimbo Woreda of Kafa-Sheka Zone (KSZ), Ethiopia with the aim to identify and analyze the farming systems and, analyze and prioritize research and development (R & D) options for enhancing income and sustainability of farming systems. The study area was classified for enhancing income and sustainability of farming systems...

Environmental Sustainability and Coffee Diversity in Africa

The montane rainforests of Ethiopia are the known centres of origin and genetic diversity for Coffea arabica. However, the remnant rainforests with the spontaneously grown wild coffee populations are under continuous threat, largely due to population pressure, indiscriminate deforestation and extensive disturbance of the natural forest habitats, an...

The present study was conducted in Gimbo woreda of kafa-sheka zone (KSZ), Ethiopia during the year 2000 with the aim to identify and analyse the farming systems and, analyse and prioritise research and development options for sustainable natural resource management ensuring increased income for the farmers. The study area was classified into zones...