Nile 2


The irrigation system in Kobo-Girrana valley is extensively developed into modern drip irrigation using ground water sources. Tomato and onion are among the major vegetables grown under drip irrigation. However, the drip lateral spacing is fixed to 1m for all irrigated crops. This leads to low crop water productivity, loss of land, less net return income and un-optimized irrigation production.

An on-station experiment was conducted to determine the effect of drip line spacing and irrigation regime on yield, irrigation water use efficiency and net return income. The experiment was carried out for two consecutive irrigation seasons in 2010/11 and 2011/12 at Kobo irrigation research station. The experimental treatments were: two lateral spacing of single row and double row corresponding to each test crop and three irrigation regime (Kp = 0.8, 1.0 and 1.2).

The results revealed that an interaction effect between the lateral spacing and irrigation regime was obtained in marketable yield and water productivity of test crops. Application of 0.8 Kp with 2m lateral spacing and 1.2 Kp with 1m lateral spacing provided relatively higher marketable yield of tomato and onion, respectively. Similarly, high water productivity was recorded with same irrigation depths and spacing regimes as to the yield.

This result generally revealed that one lateral design for each two plant rows gave high net income than the one lateral design for each one plant row for drip irrigated fresh marketable yield of onion and tomato. An optimized production and irrigation efficiency can be attained by applying irrigation depth adjusted by the given pan coefficients and drip lateral spacing in Kobo areas.

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

The current paper discusses the use of hydrological modelling tool to understand sustainable land management interventions in the Blue Nile basin of Ethiopia.

A micro-watershed named Mizewa with a drainage area of 27 km2 in Fogera district was selected and instrumented with hydrological cycle observation networks in the year 2011. The SWAT hydrological modelling tool was used to simulate landscape-wide Soil and Water Conservation (SWC) investments.

Simulations of the selected investments modelled in this analysis suggest that improvements in infiltration, decreases in surface runoff and decreases in erosion are achievable in the watershed. Further simulations suggest that a landscape-wide approach of terrace and bund construction has the greatest effect in terms of decreasing surface runoff, decreasing sediment yield and increasing groundwater flow and shallow aquifer recharge.

A comprehensive landscape investment of terraces on slopes greater than 5% and bunds maintained on slopes less than 5% would decrease surface flow by almost 50%, increase groundwater flow by 15% and decrease sediment yield from erosion by 85%. However, constructing terraces in areas with greater than 5% slope (without constructing bunds in areas under 5% slopes) has a similar effect whereby surface flow and sediment yield decreases by 45 and 83%, respectively and groundwater flow increases by 13%. Residue management also has a significant effect on surface flow and erosion in the Mizewa watershed. Average annual surface flow decreased 17 when adopting residue management on all agricultural land and 26% when coupling terracing on steep slopes with residue management in mid-range slopes.

These analyses provide the foundation for understanding feasible outcomes given a more comprehensive investment strategy. Results stemming from the current work can be paired with household level socio-economic data in order to assess program investment alternatives taking into account household constraints to Sustainable Land and Watershed Management (SLWM) investment and maintenance on private and public lands.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

Understanding the basic relationships between rainfall, runoff, soil moisture and ground water level are vital for an effective and sustainable water resources planning and management activities. But so far there are no hydrological studies in Meja watershed that aims to understand the watershed characteristics and runoff generation processes.

This study was conducted to understand runoff generation processes and model rainfall runoff relationship in Meja watershed having a drainage area of 96.6 km2. The watershed is one of the three research sites of International Water Management Institute (IWMI) developed in early 2010 in the upper Blue Nile Basin of Ethiopia. In the study, primary data of soil moisture, shallow ground water level, rainfall and runoff were collected from the hydrological monitoring network in the watershed. Hydrological models like HBV and RRL SMAR were configured to understand the relationship between rainfall and runoff in the watershed.

Relationships between rainfall, soil moisture, shallow ground water level and discharge were developed to understand runoff generation processes in the watershed. According to one year and three months data, there is no strong daily rainfall and runoff relationship (r2 <0.5) in Meja and Kolu which is nested sub-watershed; this may be due to abstractions such as irrigation and human interventions in the watershed. Ground water level and runoff has strong relationship (r2> 0.65) in monthly basis of Kolu nested sub-watershed but there is moderate relationship of rainfall and ground water level. There is strong linear relationship of rainfall and monthly averaged volumetric soil moisture in most layers of Meja and its nested sub-watersheds. The general relationship between runoff and monthly averaged soil moisture at different layers in Meja watershed and Kolu is strong and linear. Analysis of rainfall runoff models indicated better performance of HBV than RRL SMAR model.

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

The Nile Basin Development Challenge (NBDC) Program of the Challenge Program on Water and Food (CPWF) has been working in three woredas (districts) in Ethiopia – Jeldu, Diga and Fogera.

Each of the project established an innovation platform (IP) in which lessons and knowledge are shared and joint approaches towards problem identification and solutions are sought.

The Jeldu IP was established in September 2011 with 25 members representing farmers, district level institutions including the Office of Agriculture, Livestock Agency, Women’s Affairs, Office of Environmental Protection and Land Administration, Cooperatives Promotion and the Office of Water, Mining and Energy, and research and development partners such as Ambo University, Holetta Research Center, RiPPLE (Research-inspired Policy and Practice Learning in Ethiopia), the German development cooperation program on sustainable land management (GIZ-SLM), the International Livestock Research Institute (ILRI) and the International Water Management Institute (IWMI).

Innovation platform meeting at Jeldu district administration office (Photo credit: ILRI/Adie)

Innovation platform meeting at Jeldu district administration office (Photo credit: ILRI/Aberra Adie)

More institutions joined the platform in the course of its operation including a local NGO called HUNDEE which later took on the responsibility of facilitating the IP.

The IP conducted a total of seven meetings from September 2011 up to December 2013. Earlier meetings focused on identifying challenges and opportunities of rainwater management interventions along with the key priority issues of land and water management in the district. Later meetings were used for sharing of lessons and experiences around the action research and beyond.

Community engagement exercises

Despite some representation of farmers in the IP at the district level, the NBDC team early on felt that a more representative community members were required to decide on priority issues while ensuring effective participation of the community. Subsequently community members from Kolugelan, Sirity and Chilanko kebeles representing different gender, age, wealth, and education levels were invited to participate in platform discussions. After thorough discussion among IP members and the community, it was agreed that soil erosion was the most serious problem in the area.

Community engagement exercise with men and women groups at Jeldu (Photo credit: ILRI/Adie)

Community engagement exercise with men and women groups at Jeldu (Photo credit: ILRI/Aberra Adie)

Action research

The CPWF innovation fund granted USD 6,000 to conduct action research around the identified problem by the IP and the community. Platform members were requested to write a research proposal. A series of discussions were made in IP meetings and community dialogues to point out possible solution options to alleviate soil erosion problems. Primary and secondary factors contributing to soil erosion and its effects at different levels were discussed with deforestation and overgrazing of land by livestock and feed shortage identified as major contributing factors to soil erosion.The IP group identified fodder development as a feasible intervention that could also support the physical soil and water conservation campaign of the government. Following this,  technical group (TG) members of the platform (with experts and researchers from Holetta research center, Ambo University, HUNDEE, Livestock Agency and Office of Agriculture) carried out action research on fodder development.

Fodder Development Intervention – 2012

Kologelan Kebele was chosen as a first pilot intervention for its strategic representation of other kebeles in the woreda. Initially about 32 farmers registered to take part in the fodder intervention. But eventually more and more farmers showed interest when they saw their friends planting forages in their plots. Participating farmers became 96, even though project follow up only focused on the initially registered 32 farmers. The emphasis was on forage options that are already in the system, instead of introducing a brand new material to the farming system.

Desho and Wodajo

Desho grass (Pennisetum pedicellatum ), was initially introduced by Wodajo, a farmer in Chilanko kebele. Wodajo brought some splits of the grass when he went to Southern Ethiopia for an experience sharing visit sponsored by the government. He planted the grass at his backyard and the grass performed so well that it attracted the attention of his fellow farmers and the government’s extension workers. Wodajo then started making money from the sales of the splits. In one year, he sold the grass for over Birr 40,000. Wodajo and Desho became very popular in the woreda. In fact Wodajo currently owns a wood workshop in Gojo town as a result of the capital he made from consecutive sales of the Desho grass. This has played a huge motivational role in the community for the adoption of Desho grass.

The farmers at Kolugelan were also interested to plant this grass at their backyards and on soil bands for livestock feed and soil water conservation (SWC). All 96 farmers planted Desho grass (some in backyards, some on soil bands, some both ways). Farmers were also provided with Tree Lucerne (Chamaecytisus Palmensis), and Napier grass (Pennisetum purpureum).

Fodder Development Intervention in 2013

In 2013, the IP expanding the intervention to a larger number of farmers in Kolugelan kebele using an additional USD 10,000. Sixty-five new farmers were registered for fodder intervention though, once again, more farmers joined and a total of 141 additional farmers were issued Desho planting materials. More ‘Wodajos’ appeared among the farmers who planted Desho in 2012. They became sources of planting material for the intervention in 2013. Some of them sold Desho planting material for up to Birr 10,000 to their fellow farmers. Establishing Desho in backyards and on soil bands thus became much clearer in the second year of intervention. During the field day organized by the IP, farmers from neighboring kebeles appreciated the performance of Desho on soil bands and backyards during the dry season.

Farmer explaning his experience with Desho grass to field day visitors at Kolugelan, Jeldu (Photo credit: ILRI/Adie)

Farmer explaning his experience with Desho grass to field day visitors at Kolugelan (Photo credit: ILRI/Aberra Adie)

Capacity development

ILRI staff trained IP technical group members on platform facilitation and participatory research methods, which helped them while undertaking the action research. After the training, HUNDEE, the local NGO assumed the total responsibility of facilitating the IP and overseeing the action research process, including handling of financial matters. This helped NBDC staff to take a backstopping role from some distance. IP members who took part in training events and workshops witnessed their exposure to wider networks adding value to their personal careers and they enjoyed tremendous lessons from one another.

Practical training to farmers about forage management at Kolugelan, Jeldu (Photo credit: ILRI/Adie)

Practical training to farmers about forage management at Kolugelan, Jeldu (Photo credit: ILRI/Aberra Adie)

In both 2012 and 2013, farmers were trained in establishment/management and utilization of feeds to their livestock. The training in the second year included management and utilization of existing/ traditional feed resources along with improved forages.

Achievements and challenges

Farmers during the last field day and stakeholders in the IP closing event which took place on December 31, 2013 evaluated and strongly commended the project’s achievements. They testified that the project has been able to bring them together around a common agenda and that they learned much from the process  itself as well as from one another in the IP and action research process.

They also appreciated the efficient use of resources:

With limited amount of money it has been possible to achieve much – community member

It is the day of celebration of our achievements and looking forward to continued efforts, not closing day – Ato Zegeye, HUNDEE general manager.

The technical group members of the IP witnessed that their skills in conducting participatory research as a team have increased with their involvement in the action research.  Nevertheless, some of the challenges faced by the IP, especially the technical group members include: less acknowledgement and appreciation of their work with the IP by their respective supervisors; occasional conflicts; time management issues as they have their own assignments from their offices, etc.

What next?

This has been a recurring question of both farmers and IP members. Options put on the table include:

  • Farmers request improved cattle breeds for dairy. They want to produce more milk for family and market.
  • They also envision small scale milk processors for production of butter and cheese.
  • Some consider fattening of beef and sheep.
  • Holetta research center heralded the new initiative around Jeldu to apply hormonal synchronization to introduce artificial insemination services.
  • Both farmers and IP members are optimistic about the Ginchi – Gindeberet road which crosses Jeldu (Gojo town) to be asphalted in the near future to facilitate product marketing for a better price.
  • Adding more fodder options, especially legumes, has been raised during the discussions with IP members.
  • Government partners are planning to take Desho Grass to wider distribution in the woreda as part of the watershed development strategy.
  • ILRI/IWMI envisions more activities in the site with CGIAR Research Programs such as Water Land and Ecosystems and Humidtropics.

For all, the message is – ‘strike the iron when it is hot!’

Article contributed by Aberra Adie

Termites are a major pest in the semi-arid and sub-humid tropics. They pose a serious threat to agricultural crops, forestry seedlings, rangelands and wooden structures. In Ethiopia the problem is particularly serious in the western part of the country, specifically in Wollega Zones of Oromia Region. In the past, several attempts were made to reduce damage caused by termites, including extensive termite mound poisoning campaigns. These interventions not only had a negative effect on the environment, but were also largely ineffective.

Based on previous work in Uganda showing that adding organic matter to the soil diverts termites from the plant and functions as alternative feed source, a project was commenced by the Challenge Program for Water and Food (CPWF). In partnership with IWMI and Makerere University, ILRI and Wollega University took the lead in working with local stakeholders to identify sustainable solutions to address the termite problem in Diga, Ethiopia. The research consisted of two major activities; 1) a baseline study to better understand the relation between land use, water, termites and local institutions; and 2) the design and testing of identified interventions.

The baseline findings indicated that termite damage depends on various biophysical and socio-institutional factors, which requires an integrated, but also targeted, termite management approach; two termite species are locally recognized, but level of knowledge highly varies among farmers within and between kebeles. Various trials were designed for on-farm experimentation using cattle manure and crop residues as alternative feed source for termites in combination with other cultivation techniques.

The result obtained indicated that application of cattle manure and crop residues increases the organic matter content of the soil by 24.5 and 13.9%—grain yield of maize by 38.8 and 16.7% and reduces termite count per plant by 29.6 and 21.6% as compared to the control treatment, respectively. The results are in line with farmers’ own evaluation of the trials. Results and implications are discussed.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting

Read the technical report No. 9 “Integrated termite management for improved  rainwater management: A synthesis of African experiences


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

Wheels 1 The Nile Basin Development Challenge (NBDC) established local Innovation Platforms (IPs) in each of the three sites where it worked.

The platforms aimed to bring stakeholders together (government offices, NGOs, researchers and community representatives) to identify joint solutions to pressing rainwater management challenges.

But how could action be incentivized when the returns on investment in natural resource management are so long-term?

In an effort to provide incentives for stakeholder engagement, the team trialled use of a small grant fund from the CPWF.

Read the full story on the CPWF web site

More on the NBDC innovation platforms

The reasons why farmers are unable to harness the benefits embedded in technologies and take advantage of business opportunities in livestock sector in developing countries remain unresolved.

Drawing on insights from innovation systems approaches, this paper assesses innovation constraints, identifies the bottlenecks and missing links in dairy sector and suggests some instruments needed to address the constraints.

We find that missing actors, limited capacity of existing actors, inadequate interactions between actors and poor coordination of activities along dairy value chain have been the major reasons for low technology adoption and underdevelopment of the dairy sub-sector in developing countries.

Future research should pay attention to designing, prototyping and experimenting with alternative institutional arrangements that can effectively coordinate inputs, services, processes and outputs in livestock value chains.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

This paper calls attention to the importance of social cooperation in irrigation farming. It argues that a mere focus on the technical aspect of irrigation, disregarding its social aspects undermines the long-term benefits of irrigation to rural livelihoods.

This assertion draws on lessons from small-irrigation practices in Fogera, in the Blue Nile Basin of Ethiopia, where the research conducted fieldwork-based qualitative research. In recent years irrigation farming has drawn a growing interest among farmers in rural Fogera. Farmers practise small-scale irrigation that includes traditional irrigation and motor pump irrigation. Farmers assert that irrigation has brought farming benefits through cultivation of more crops as well as new crops that serve food and cash purposes. Such benefits have particularly spurred the enthusiasm for motor pump irrigation.

However, the practice of motor pump irrigation largely relies on the motor-pump technology, overlooking the social scheme of irrigation. While traditional irrigation involves more social cooperation involving joint activities, water allocations and irrigation schedules, lack of social cooperation and such institutional conditions is widespread in motor pump irrigation. Local classification of irrigation practices also associate the mechanism of irrigation use and management including water use regulations and water use turns with traditional irrigation in contrast to motor pump irrigation.

The neglect of social cooperation within current practices of motor pump irrigation will have significant adverse implications on long-term practices. Farmers have been already concerned about how competitions for water are growing, limiting the duration of water availability and creating water shortage.

The study suggests that while farmers’ willingness to practise motor pump irrigation in Fogera has been stimulated by its livelihood benefits, sustained benefits of this irrigation scheme require social cooperation and feasible institutional conditions that can mediate water usage across user villages.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

Fogera District is endowed with diverse natural resources. It has huge potential water sources which are suitable for irrigation during the dry season for the production of horticultural crops mainly vegetables. However, there is a great market problem in the area associated with the nature of horticultural crops such as perishability and seasonality in production. Moreover, the area is characterized by the existence of strong brokerage activity with their economic role not known.

The main objective of this study was to analyse the economic roles played by the brokerage institutions in smallholder market linkages to market outlets in horticultural marketing and determinants of decisions on whether to use brokerage institutions or not under imperfect market condition in Fogera District, in northwestern Amhara Region particularly focusing on onion and tomato.

The result of the study showed that the brokerage institutions are characterized as urban, peri-urban and farmer brokers. There was significant brokerage activity only for onion marketing and in the case of tomato marketing the brokers act as rural assemblers. Most of the horticultural trading in the area is undertaken by credit and thrust based and in this arena brokerage institutions are playing most important role by linking smallholder farmers to market outlets.

The result of the study also revealed that smallholder farmers using brokerage institutions have got 4393.62 ETB higher net income and 13.55% of greater marketed surplus than those smallholders who do not use. Generally, the brokerage institutions are playing a significant role in forming market linkages between smallholders and wholesalers under imperfect market conditions with their limitations.

Therefore, the study highly recommends the formalization of the brokerage institutions through licensing, training and continuous follow up in the district considering the experience of ECX.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

Lack of long-term hydrological monitoring makes it difficult to determine impacts of changing land use on the water dynamics for many catchments in Africa.

Here we use local ecological knowledge (LEK) to explore the impacts of rapid expansion of eucalyptus agroforestry on water security in the Ethiopian highlands. Local knowledge about the impacts of changes in tree cover was collected from farmers (n = 30), extension staff (n = 2) and timber merchants (n = 2) in five kebeles within the Jeldu woreda.

Jeldu has undergone significant land use change over the last forty years. The area was heavily deforested 20 years ago and farmers associate this time with a major change in the water dynamics. Recently the development of a new road to Goja, the main town, opened up the area as a source of timber for Addis Ababa. This has resulted in a substantial expansion of eucalyptus plots adjacent to roads on the upper plateau and in riparian areas where growth is accelerated. Poorer farmers have been displaced on to the sloping land (which used to be woodland) where there is now evidence of rapid soil degradation.

The key findings were that farmers identified significant trade-offs at the plot scale between eucalyptus and adjacent crop fields. They also identified indicators suggesting the sudden increase in eucalyptus cover had accelerated declines in water availability at landscape scales.

The study showed the value of using LEK for exploring immediate landscape scale dynamics in the absence of hydrological monitoring. Whilst there is a degree of uncertainty surrounding the impacts of eucalyptus, this research demonstrated local awareness associated of problems associated with unregulated expansion of eucalyptus woodlots on the water regulating capacity at immediate landscape scales in the Ethiopian highlands.

See the presentation:

Read the paper

See the full proceedings of the NBDC Science meeting


This paper was first presented at the Nile Basin Development Challenge Science meeting. The NBDC Science meeting was held on 9 and 10 July 2013 at the ILRI-Ethiopia campus, with the objectives to exchange experiences and research results across NBDC scientists involved in the NBDC projects and to discuss challenges and possible solutions.

« Previous PageNext Page »