Digital extension services (DESs) play a crucial role in transforming the agri-food sector while creating the potential to enhance production towards sustainable development via ensuring resource efficiency, environmental resilience, and economic viability for smallholder farmers. However, there is less research on the availability and quality of digital advisory information to provide the foundation for the ways forward to ensure accessible and timely benefits of science-based extension and innovation for smallholder farmers. This study used a systematic review method to explore the opportunities and barriers to develop interactive DESs in developing countries (2005–2021). Features of 141 articles were summarized resulting in the identification of 13 opportunities and 21 barriers. Opportunities indicate that interactive DESs were the best source for learning and the exchange of information/ideas/experiences, useful for enhancing agricultural productivity and profitability, creating network collaboration among farmers and stakeholders, and making extension service delivery cost-effective. Barriers of interactive DESs include a lack of a two-way interaction information, lack of a centralized information network between farmers and service providers, lack of technical know-how on ICTs, poor internet connection, and lack of effective training on ICTs. However, farmers’ awareness, motivation, and readiness to use interactive DESs has increased in several countries. It is therefore a great opportunity to invest in digital platforms as a long-term intervention to boost sustainable agricultural sustainability.

With growing global demand for food, unsustainable farming practices and large greenhouse gas emissions, farming systems need to sequester more carbon than they emit, while also increasing productivity and food production. The Kenya Agricultural Carbon Project (KACP) recruited farmer groups committed to more Sustainable Agricultural Land Management (SALM) practices and provided these groups with initial advisory services on SALM, farm enterprise development and village savings and loan associations. Recommended SALM practices included agroforestry, cover crops, mulching, composting manure, terracing, reduced tillage and water harvesting. The effects of the KACP on the uptake of SALM practices, maize yield, perceived food self-sufficiency and savings during the initial four years were assessed comparing control and project farmers using interviews, field visits and measurements. Farmers participating in the KACP seemed to have increased uptake of most SALM practices and decreased the use of practices to be avoided under the KACP recommendations. Agroforestry and terraces showed positive effects on maize yield. During all four years, the KACP farms had higher maize yield than control farms, but yield differences were similar in 2009 and 2012 and there was no overall significant effect of the KACP. In 2012, the KACP farms had higher food self-sufficiency and tended to have higher monetary savings than control farms.

Farmers in Kisumu and Trans Nzoia counties, Kenya, were aware of more adaptation than coping measures for dealing with rainfall variability both on and off-farm. Interviews with female and male farmer groups revealed that they all experienced challenges related to increasing rainfall variability whether or not they had regular access to advisory services. Men identified more measures than women and had better access to learning sources. Farmers in Kisumu were aware of more measures than those in Trans Nzoia but thought them less effective. Money, knowledge and labor were the most limiting factors preventing the uptake of adaptation measures.

Rainfall variability is becoming more profound in East Africa. Smallholders relying on rainfed agriculture are particularly affected and need to adapt their farming systems accordingly. This study examined the measures small-scale farmers use to adapt to, or cope with rainfall variability and their rated perceived effectiveness. It also explored limitations to adoption of measures and sources of learning measures. Questionnaire-based interviews were held with 80 smallholder farmers, both female and male, living in Kisumu and Trans Nzoia counties in Kenya who had regular or sporadic access to advisory services (denoted trained and non-trained farmers). Trained farmers used more adaptation measures, especially of the measures perceived to be more effective, than non-trained farmers. Female farmers felt more limited by lack of knowledge than male farmers, while money, land and labour limited the smallholder farmers equally. Few measures were used to overcome limitations, but several limitations were covered within the advisory package used for trained farmers, and therefore large differences were seen not only in numbers of measures used, but also in the choice of measures and perceived effectiveness of use. Thus advisory services and policy interventions can play important roles in future efforts to improve adoption of measures.

Drylands face urgent development challenges that are complex and interconnected, requiring holistic systems-based approaches. Here, we present a social–ecological systems framework to guide research, policy, and action across disciplines and sectors towards sustainability transformations in drylands for improved livelihoods and enhanced ecosystem, livestock, and human health. Our conceptual framework integrates three non-exclusive and complementary lenses of human-driven transformations: systemic, structural and enabling/grassroots change. Based on these three complementary lenses, along with three main phases of transformation and key associated actions, we briefly illustrate the framework’s value through the case of the Karamoja cross-border region of East Africa. We show how the framework can be used as an entry point to identify and analyse key challenges and their interlinkages; envision desired social–ecological systems; and explore pathways towards sustainability. The framework provides actionable guidance to co-develop context-specific interventions that support sustainability transformations in drylands.