16pgs, Humanity's growing appetites for food and energy are placing unprecedented yield targets on our lands. Chasing those ever-expanding land intensification targets gave rise to monocultures and sharpened the divide between food and energy production groups. Here, we argue that this does not have to be a zero-sum game if food and energy can be co-generated in the same land. Co-generation can lead to sustainable intensification but requires a paradigm shift in the way we manage our resources, particularly light. Using an extended model of plant photosynthesis and transpiration, we demonstrate how plants react to different incident light spectra and show that manipulating light could be effective for boosting land and water efficiencies, thus potentially improving soil health. This knowledge can possibly unlock the real potential of promising modern agricultural technologies that target optimization of light allocations such as agrivoltaics. This study suggests that the blue part of the light spectrum is less efficient in terms of carbon assimilation and water use and could be more effectively used to produce solar energy, while the red part could efficiently produce biomass. A sensitivity analysis to the most important crop and environmental variables (irradiance, air temperature, humidity, and CO2 concentration) shows that plant response to different light treatments is sensitive to environmental boundary conditions and is species-specific. Therefore, further research is necessary to assess which crops and climates are more suitable to optimize the proposed food-water-energy nexus.
15 pages, In the past few decades, climate-smart agriculture (CSA) has been promoted to improve food security and raise incomes as a strategy for sustainable agricultural development. The adoption rates among smallholder farmers, particularly in Africa, remain low and have varied in different contexts. This study investigated the market participation spillover effects from the adoption of CSA practices in central Malawi using the control function approach to address any endogeneity in the relationship. The hypothesis that the extent of the use of CSA practices in the past 10 years can lead to production surpluses that enable smallholder farmers to participate in markets and thereby increase in agricultural incomes was tested. Using survey data from 470 households in two districts of rural Malawi, a clear positive association between the number of CSA practices used and the extent of market participation was found. The findings suggest, among others, the need to intensify efforts to promote CSA adoption specifically over a longer period for benefits of the technologies to materialise. The adoption of CSA practices over time enhances crop market participation, an important aspect required for production sustainability as well as for transforming agriculture towards greater market orientation among smallholder farmers.
