Replication data for: Allanblackia floribunda: a new oil tree crop for africa: amenability to grafting

Three Allanblackia species (A. floribunda, A. stuhlmannii and A. parviflora) with high nutritive, medicinal, cosmetic and economic values are currently being domesticated as new oil tree crops. Allanblackia seeds contain a hard white fat consisting mostly of stearic (52 “58%) and oleic (39 “49%) acids. This unusual fatty acid content has the right properties for many different food and cosmetic products making them commercially interesting. Vegetative propagation studies on A. floribunda, which grows naturally in the moist forest of Cameroon and Nigeria, were initiated aimed at evaluating its amenability to grafting. Scions were grafted onto 18 month old rootstocks of A. floribunda using side tongue, top cleft, side veneer, whip-and-tongue methods under nursery conditions in Cameroon. In parallel, side tongue and inverted™ budding methods were also tested in situ on young A. floribunda wildings growing under semi-deciduous and evergreen tree covers. In addition, the effects of protecting side tongue new grafts with non perforated translucent plastic, perforated translucent plastic and aluminium foil were assessed. Under nursery conditions, side tongue grafts were significantly more successful (80.0 ± 6.3%), than grafts of side veneer (52.5 ± 7.9%), top cleft (55.0 ± 7.9%) and whip and tongue (50.0 ± 7.9%). The success of side tongue graft was further increased (86.7 ± 6.2%) under the shade of evergreen trees when protected by non perforated translucent plastic. These results indicate the potential for in situ grafting and top working to promote cultivation of more productive germplasm of Allanblackia within multifunctional agricultural systems.

CAWT Survey: Scaling-up the science and practice of conservation agriculture in sub-saharan Africa

An evergreen revolution is required in sub-Saharan Africa where increased human and livestock activities have led to the collapse of conventional soil conservation systems and increased land degradation soil compaction, nutrient and organic matter depletion, reduced water holding capacity and microbial activity. The proposed project is premised on the hypothesis that integrating trees with conservation agriculture has the potential to enable smallholder farmers attain resilient evergreen agriculture leading to more sustainable production and agro-ecosystems, and hence contribute to poverty reduction and increased food security while enhancing the resilience of systems in the face of climate change. However, for CAWT to become a reality for smallholder farmers in SSA there are several gaps in knowledge that must be filled. Information is lacking on the drivers that have made some countries succeed in scaling up CA, the constraints they face and how they address them, lessons learnt and how to advance success to larger scale impacts. The complementary effects of trees on CA under different environmental conditions are not well documented. Other issues include knowledge on how long term access to land, availability of inputs, appropriate CA implements, adequate extension support and advice, and institutional and policy support influence adoption of CA. Empowering, adaptive and participatory, bottom-up research and extension approaches are essential to stimulate more farmers to test and adopt CA and agroforestry for sustainable production intensification. The overall goal of the CAWT initiative is to promote a continental wide adoption of conservation agriculture and agroforestry to sustain the productive potential of the natural resource base, improve incomes, foods security and livelihoods of smallholder farmers in sub Saharan Africa.

Ethiopian Rural Household Surveys (ERHS), 1989-2009

The Ethiopia Rural Household Survey (ERHS) is a unique longitudinal household data set covering households in a number of villages in rural Ethiopia. Data collection started in 1989, when a team visited 6 farming villages in Central and Southern Ethiopia. In 1989, IFPRI conducted a survey in seven Peasant Associations located in the regions Amhara, Oromiya and the Southern Ethiopian People’s Association (SNNPR). Civil conflict prevented survey work from being undertaken in Tigray. Under extremely difficult field conditions, household data were collected in order to study the response of households to food crises. The study collected consumption, asset and income data on about 450 households. In 1994, the survey was expanded to cover 15 villages across the country. An additional round was conducted in late 1994, with further rounds in 1995, 1997, 1999, 2004, and 2009. In addition, nine new villages were selected giving a sample of 1477 households. The nine additional communities were selected to account for the diversity in the farming systems in the country, including the grain-plough areas of the Northern and Central highlands, the enset-growing areas and the sorghum-hoe areas. Topics addressed in the survey include household characteristics, agriculture and livestock information, food consumption, health, women’s activities, as well as community level data on electricity and water, sewage and toilet facilities, health services, education, NGO activity, migration, wages, and production and marketing.

Ethiopia Nile Basin Climate Change Adaptation Dataset

The household survey was carried out in the Nile River Basin in Ethiopia. The household sampling frame in Ethiopia was developed to ensure representation for the Nile River Basin at the woreda (district) level regarding level of rainfall patterns in terms of both annual total and variation; the four classes of traditionally defined agro-ecological zones (AEZs) found in the basin; vulnerability of food production systems (through the proxy of frequency of food aid in the past ten years); and irrigation prevalence. All data used for the sample frame is from the Atlas of the Ethiopian Rural Economy (Benson et al., 2006). Each woreda was classified based on : agroecological zone (Kolla, Weynadega, Dega, and Bereha), the percent of cultivated land under irrigation (no data, 0-2%, 2-4%, 4-8%, and 8% or greater), average annual rainfall (0-854mm, 854-1133mm, 1133-1413mm, 1413-1692mm, 1692mm or greater), rainfall
variability (coefficient of variation for annual rainfall), and vulnerability (number of years of food aid received in the past 10 years). Twenty woredas were selected such that across each of the above dimensions the proportion falling into each class for the sample matched as closely as possible the proportions for the entire Ethiopian Nile basin. Peasant associations (administrative units lower than districts) were also purposely selected to include households that irrigate their farms. One peasant association was selected from every woreda for a total of 20 peasant associations. Random sampling was used in selecting 50 households from each peasant administration within the 20 woredas. Thus, the final dataset contains 1,000 observations from 20 woredas in 5 regional states in Ethiopia (Tigray, Amhara, Oromiya, Benishangul Gumuz, and Southern Nations Nationalities and Peoples (SNNP)). The related South Africa Limpopo Basin Climate Change Adaptation dataset is also available from IFPRI’s website at

Rural Economy Knowledge Support System (REKSS) – Nigeria Institutional and Individual Dataset

This survey was conducted to identify the current capacity within Nigeria for providing evidence for policymaking and for creating this capacity for future generations. This is part of the program to support the designing and implementing of evidence-based, pro-poor, gender sensitive and environmentally sustainable agricultural and rural development policies and strategies in Nigeria. The data presented originates from the survey conducted in 2008. A total of 25 institutions and 184 individuals were sampled. Topics covered for institutions include statements seeking to establish an understanding of the agricultural and rural policy environment and process, institution and institutional environment, financial resource management, human resources management, staff performance and performance appraisal, organizational management, autonomy in personnel and budgetary issues, and technical capacity. Topics covered for individuals include background information about respondent, experience with the agricultural and rural development policy process, gender in the policy process, environmental issues in the agricultural and rural development policy process, job satisfaction and institutional incentives.