Cassava is Africa's second most important food crop. The cassava transformation that is now underway in West Africa is fueled by new high yielding TMS varieties that have transformed cassava from a low-yielding, famine-reserve crop to a high-yielding cash crop for both rural and urban consumers. The book highlights the role of cassava as a "poverty fighter" by increasing cassava productivity and driving down the cost of cassava in rural and urban diets.

Eaten by both humans and animals, and with more than 20 derivative products, cassava offers considerable opportunities for income and advantages for food security. This versatile shrub is widely used in the food, textiles and other industries. For example, cassava tubers may be sold for preparation into pastries, tapioca, food pasta or chips, while the plant’s by-products include paper, glues and alcohol. Attractively laid out, with step-by-step guides and a wealth of colourful figures, illustrations and tables, this handbook makes simple techniques available to cassava producers, improving production, storage and processing.

Nigeria has for decades placed enormous emphasis on diversifying its economy beyond oil and into sectors such as agribusiness and manufacturing. Lack of progress on the diversification agenda could be blamed on weak implementation and misalignment of public spending, but it also reflects more profound underlying issues. For example, declarations that any particular sector should drive diversification without offering clarity on specific investment priorities and expected outcomes will not persuade budget holders to allocate development resources. The lack of clarity also deprives policy makers and practitioners of the information, inspiration, and conviction to develop and execute sector plans that could operationalize diversification. Transforming Agribusiness in Nigeria for Inclusive Recovery, Jobs Creation, and Poverty Reduction: Policy Reforms and Investment Priorities aims to provide that clarity by illustrating the potential of the agribusiness sector to accelerate inclusive growth, create jobs, and reduce poverty. Building on an early finding that this sector provides the best prospects for inclusive growth and more and better jobs, the book identifies the specific agricultural value chains with the highest potential to create jobs, reduce poverty, and improve nutrition outcomes. The findings demonstrate, however, that the value chains with the most potential to pursue one policy objective are not necessarily as effective for other objectives, clearly calling for selectivity of value chains, depending on policy objectives. The book also estimates the level of growth required to meet specific jobs targets and finds that the growth burden is lower when on-farm and off-farm segments of agribusiness grow in tandem and higher if either segment stagnates. It concludes that a whole-of-agribusiness approach that emphasizes coordinated investments between on-farm and off-farm segments is needed to enable the sector to meet its potential in creating jobs and generating inclusive growth.

Over the next ten years, the African rural space will be the theatre of profound changes as the activities envisaged for agricultural transformation are drastically scaled up. Increased food demand and changing consumption habits driven by demographic factors, such as population growth and urbanization, are already leading to a rapid increase of net food imports, opening a huge opportunity for the agribusiness sector of many African countries. Against this backdrop and in line with its mission to spur sustainable economic development and social progress, the African Development Bank (AfDB) in 2016 launched Feed Africa, a strategy that is intended to contribute substantially to the transformation of African agriculture by 2025, and to reverse Africa's dependence on imported foods. As part of this strategy, AfDB is promoting the concept of staple crops processing zones (SCPZs), which are agrobased spatial development initiatives, designed to concentrate agro-processing activities within areas of high agricultural potential to boost productivity and integrate the production, processing and marketing of selected commodities. As essential components, SCPZs include an agro-processing hub, a number of agricultural transformation centres (ATCs) and agricultural production areas. The ATCs are designed to link smallholder farmers to the agro-processing hub and are strategically located in high production areas, with the aim of serving as aggregation points to accumulate products from the community to supply the hub for further value addition, or to send them to centres of great demand for distribution and retail to consumers. This study has attempted to assess the feasibility and applicability of the ATC concept to selected regions in Zambia, Côte d'Ivoire and the United Republic of Tanzania. Findings from the field have demonstrated the potential of ATCs to address community needs and constraints for a range of selected value chains, and have helped to identify different ATC models that could work in each specific context.

Smallholder farming systems contribute a substantial quantity of the food consumed in many lower and middle-income countries and contribute to the national and local economies. Despite the importance of smallholder farming, a transformation is needed in order to deliver food security and decent incomes for the farmers themselves and at the national level. This transformation must also be sustainable in terms of environmental impacts and social equity in order to be successful in the long term. The pressures of population growth, climate change, and land fragmentation compound the problem. Addressing these overlapping issues is a big challenge. One obstacle is the lack of good quality granular data linking these issues together. Household surveys are the workhorse method for gathering such data, but there are well-known problems that prevent household survey data from building up a “big picture” and delivering insights beyond the geographical boundary of each individual study. Such obstacles include the lack of access to datasets, differences in survey design, and respondent biases. Agile, data-oriented research tools can help to overcome these challenges. We use the term “agile” to imply methods that do not attempt exhaustive measurements, which are designed to be easy to use, and which entail some degree of flexibility in terms of adaptation to local conditions and integration with other tools or methods. Often these methods also nudge the behavior of tool users towards best practices. In recent years various research tools and approaches have been published which fit within our definition of “agile data-oriented research tools”. The domains these tools function in include monitoring and evaluation, intervention targeting, tailored information delivery, citizen science, credit scoring, and user feedback collection; all with the over-arching aim to improve data quality and access for those studying the sustainable development of smallholder farming systems. The goal of this Research Topic is to better define that niche, the ecosystem of tools and current practices, and to explore how such approaches can provide the underpinning knowledge required for the transformation of smallholder farming systems. One example of an agile data-oriented research tool is the Rural Household Multi-Indicator Survey (RHoMIS). It is a modular, digital system for building household surveys addressing the common topics in smallholder development. It was purposefully designed to give a broad overview of the farm system whist keeping survey duration to a minimum, to be user-friendly in implementation, and to be sufficiently flexible to function in a broad variety of locations and projects. Since 2015 it has been used by 30 organizations in 32 countries to interview over 34,000 households. The tool and database are open access and a community of practice is developing around the tool. We particularly welcome contributions that engage with the RHoMIS tool and data. However, we also describe the tool in order to provide an example of what is meant by an agile data-oriented research tool, and welcome contributions focusing on other tools or methodologies. We encourage the submission of manuscripts addressing the above topic, and those which fit within one of the following three sub-themes: (i) Perspectives or review articles which explore the niche, best practices, or promising approaches in agile data-oriented research tools for smallholder farm system transformation. Also, technology and code articles that describe new tools are welcomed. (ii) Original research articles presenting analyses based on data derived from agile data-oriented tools used at the project level. Examples include impact evaluations, adoption studies, targeting studies, or adaptive management, and should reflect on the additional benefit leveraged by the agile method applied. (iii) Original research articles that make use of the large amounts of data generated by such agile methods and/or link between agile data and other data sources. Examples include meta-analyses of data from multiple studies, layering data collected from different agile tools, or linking agile data to remote sensing or large-scale modeling outputs.