Managing vulnerability to drought and enhancing livelihood resilience in sub-Saharan Africa: Technological, institutional and policy options

Shiferaw, Bekele; Tesfaye, Kindie; Kassie, Menale; Abate, Tsedeke; Prasanna, B. M.; Menkir, Abebe

doi:10.1016/j.wace.2014.04.004

Cited by 463 publications

(328 citation statements)

References 43 publications

Supporting

Mentioning

290

Contrasting

Unclassified

Order By: Relevance

“…See also the definition of heat wave in [51]. Similarly, food security is strongly affected by prolonged heat and drought stress in some key regions in the world and contingency plans -based on risk reduction and insurance-based methods -are continuously updated to take into account the time scale of the persistence of extreme conditions [9,52]. Some explicit results have been presented in the physical literature regarding extremes of time series resulting from stochastic variables X j featuring long-term correlations.…”

Section: Correlation and Clusteringmentioning

confidence: 99%

Extremes and Recurrence in Dynamical Systems

Lucarini¹,

Faranda²,

Freitas³

et al. 2016

193

253

View full text Add to dashboard Cite

ii 4.1.2 The New Conditions 44 4.1.3 The Existence of EVL for General Stationary Stochastic Processes under Weaker Hypotheses 46 4.1.4 Proofs of Theorem 4.1.4 and Corollary 4.1.5 48 4.2 Extreme Values for Dynamically Defined Stochastic Processes 53 4.2.1 Observables and Corresponding Extreme Value Laws 55 4.2.2 Extreme Value Laws for Uniformly Expanding Systems 59 4.2.3 Example 4.2.1 revisited 61 4.2.4 Proof of the Dichotomy for Uniformly Expanding Maps 63 4.3 Point Processes of Rare Events 64 4.3.1 Absence of Clustering 64 4.3.2 Presence of Clustering 65 4.3.3 Dichotomy for Uniformly Expanding Systems for Point Processes 67 4.4 Conditions Д q (u n ), D 3 (u n ), D p (u n ) * and Decay of Correlations 68 4.5 Specific Dynamical Systems where the Dichotomy Applies 71 4.5.1 Rychlik Systems 72 4.5.2 Piecewise Expanding Maps in Higher Dimensions 73 4.6 Extreme Value Laws for Physical Observables 74

show abstract

Section: Correlation and Clusteringmentioning

confidence: 99%

Extremes and Recurrence in Dynamical Systems

Lucarini¹,

Faranda²,

Freitas³

et al. 2016

193

253

View full text Add to dashboard Cite

show abstract

“…The government and various development partners support and encourage agricultural cooperatives. The support aims to strengthen modern and market-oriented agricultural cooperatives to improve the efficiency of agricultural markets (Shiferaw et al 2014). Agricultural cooperatives include cooperatives engaged in the production and marketing of agricultural commodities, such as dairy, fruits and vegetables, and seed.…”

Section: Types Of Cooperativesmentioning

confidence: 99%

“…Members have a common goal for the seed business, which inspires them to produce the best quality seed (Stockbridge, Dorward, and Kydd 2003). Government and development partners facilitate trainings for members to acquire technical skills and to give advice for producing quality products (Shiferaw et al 2014). …”

Section: Quality Seed Productionmentioning

confidence: 99%

Seed producer cooperatives in the Ethiopian seed sector and their role in seed supply improvement: A review

Sisay

Verhees

Trijp

2017

Journal of Crop Improvement

View full text Add to dashboard Cite

The role of seed producer cooperatives (SPCs) in the Ethiopian seed sector and their contribution to seed supply improvement have received attention from researchers, policymakers, and development partners. However, limited work has been done in reviewing and documenting their involvement in the seed sector development. In this paper, we review and discuss the SPCs in the Ethiopian seed sector. Specifically, we reflect on the contribution of SPCs to improving seed availability and access in the country. The current liberal market system of Ethiopia creates new opportunities for growth as successful enterprises, but also brings new challenges, such as more intense competition for smallholder producers. The government policy encourages SPCs to engage in seed business. We draw on scientific literature, reports, white papers, project documents, and websites. The review reveals that the seed sector in Ethiopia consists of three seed systems: formal, informal, and intermediary seed systems. Each seed system has a specific contribution to the delivery of seed to farmers, but they vary in their approach and respective strategies. The SPCs are categorized in the intermediary seed system because they have features of both formal and informal seed systems. They play a key role in meeting seed demand and contribute greatly to seed supply improvement through high-volume production of seed, crop, and variety diversification, and seed delivery to farmers. They produce and market the seed through various market channels, including direct sales to farmers, sales through contractual agreement, and sales directly to institutional buyers. Their contribution to improving the seed supply and seed security has received considerable recognition by policymakers and development practitioners. Therefore, government and development partners should support and strengthen SPCs to maximize their success in the seed business and their contribution to improving the seed supply in Ethiopia.ARTICLE HISTORY

show abstract

“…Burundi, Kenya, Rwanda, Tanzania, and Uganda), Guo et al (2009) demonstrated that urea application to maize was only attractive for high market access in Tanzania and Uganda at a value cost ratio of greater than 3 (Table 2). Strengthening linkages to input and output markets to increase the profitability of ISFM practices in the smallholder farming systems is crucial to improve productivity (Shiferaw et al 2014), and consequently food and nutrition security. The high costs of inputs and low output prices in remote areas can generally be associated with transportation costs, low availability of inputs, limited market opportunities, as well as many kinds of formal and informal taxation.…”

Section: Poor Input and Output Marketsmentioning

confidence: 99%

Dilemma of nitrogen management for future food security in sub-Saharan Africa – a review

et al. 2017

View full text Add to dashboard Cite

Abstract. Food security entails having sufficient, safe, and nutritious food to meet dietary needs. The need to optimise nitrogen (N) use for nutrition security while minimising environmental risks in sub-Saharan Africa (SSA) is overdue. Challenges related to managing N use in SSA can be associated with both insufficient use and excessive loss, and thus the continent must address the 'too little' and 'too much' paradox. Too little N is used in food production (80% of countries have N deficiencies), which has led to chronic food insecurity and malnutrition. Conversely, too much N load in water bodies due mainly to soil erosion, leaching, limited N recovery from wastewater, and atmospheric deposition contributes to eutrophication (152 Gg N year -1 in Lake Victoria, East Africa). Limited research has been conducted to improve N use for food production and adoption remains low, mainly because farming is generally practiced by resource-poor smallholder farmers. In addition, little has been done to effectively address the 'too much' issues, as a consequence of limited research capacity. This research gap must be addressed, and supportive policies operationalised, to maximise N benefits, while also minimising pollution. Innovation platforms involving key stakeholders are required to address N use efficiency along the food supply chain in SSA, as well as other world regions with similar challenges.

show abstract

Managing vulnerability to drought and enhancing livelihood resilience in sub-Saharan Africa: Technological, institutional and policy options

Cited by 463 publications

References 43 publications

Extremes and Recurrence in Dynamical Systems

Extremes and Recurrence in Dynamical Systems

Seed producer cooperatives in the Ethiopian seed sector and their role in seed supply improvement: A review

Dilemma of nitrogen management for future food security in sub-Saharan Africa – a review

Contact Info

Product

Resources

About