Sustainable intensification of smallholder farming is a serious option for satisfying 2050 global cereal requirements and alleviating persistent poverty. That option seems far off for Sub-Sahara Africa (SSA) where technology-driven productivity growth has largely failed. The article revisits this issue from a number of angles: current approaches to enlisting SSA smallholders in agricultural development; the history of the phenomenal productivity growth in the USA, The Netherlands and Green Revolution Asia; and the current framework conditions for SSA productivity growth.

Innovation Platforms (IPs) are seen as a promising vehicle to foster a paradigm shift in agricultural research for development (AR4D). By facilitating interaction, negotiation and collective action between farmers, researchers and other stakeholders, IPs can contribute to more integrated, systemic innovation that is essential for achieving agricultural development impacts. However, successful implementation of IPs requires institutional change within AR4D establishments.

This paper takes the viewpoint of a social scientist and looks at agricultural scientists' pathways for science impact. Awareness of these pathways is increasingly becoming part and parcel of the professionalism of the agricultural scientist, now that the pressure is on to mobilize smallholders and their productive resources for (global) food security and for reducing persistent rural poverty. Significant new thinking about pathways is emerging and it is useful to present some of this, even if it is not cut-and-dried.

The Great Lakes region of Central Africa is an area abundant in hills, people and conflicts. Its high altitude and cooler climate make it ideal for agriculture. But soils have been exhausted, spare land is no longer available, and farm households in parts of this region rank among the most food insecure and malnourished on earth. Years of civil conflict have moreover paralyzed agricultural advisory and extension services and resulted in poor access to markets.

A platform of farmers, retailers and service providers, civil society organisations, NGOs, government officials, and researchers improves livelihoods in Rwanda. Through interaction and collaboration, these groups experiment with various technological and institutional innovations, thereby tackling local agricultural challenges. This experience illustrates the importance of institutionalising a space where knowledge can be co-created

This case study zooms in on multi-stakeholder processes in the East and Central Africa (ECA) Action Area or Flagship that were launched on 20 May 2013 in Bukavu, DR Congo. The ECA Flagship encom-passes the Rwanda, DR Congo, Burundi, Uganda, Kenya and Ethiopia Action Sites. More specifically, the case study describes and reflects upon the first two years of CGIAR Humidtropics in DR Congo. aiming to outline the multi-stakeholder process as it unfolded and highlight lessons that can be learned from this.

To support the multi-stakeholder process in Burundi, the national research institute ISABU (Institut des Sciences Agronomiques du Bu-rundi) was requested to act as the facilitating organisation. ISABU had previously partnered with the CGIAR centres in Burundi under the CIALCA program that had supported partnerships to coordinate activities and stimulate demand-driven research. With the aim of building on existing collaboration and activities, it was decided to re-engage with former CIALCA partners, including ISABU.

Humidtropics adopts an integrated systems perspective. Instead of tar-geting one single pre-selected commodity and trying to boost its produc-tivity at farm level, Humidtropics focuses on stimulating productivity, nat-ural resource management (NRM) and institutional innovations across different levels in order to achieve more sustainable impacts. It consid-ers all farm enterprises and their interactions, as well as nutrition, social differentiation (e.g.

Utilization of systems approach using multistakeholder process as modality of intervention has been increasingly experimented in agricultural research in tropical zones. Recent research findings indicated strong evidence of the positive contribution of research for development (R4D) and innovation platforms (IP) in increasing the impact of research for development interventions. However, specific factors of the process leading to higher impact yet to discovered.