Date of Graduation
Doctor of Philosophy in Environmental Dynamics (PhD)
Lawton Lanier Nalley
Kristofor R. Brye
Second Committee Member
Rodolfo M. Nayga, Jr.
Third Committee Member
Conservation agriculture, Adoption, Ecosystem, Environmental efficiency, Environmental impact, Sub-Saharan Africa, Sustainable agricultural production
This dissertation explores three aspects of conservation agriculture (CA) in the Sub-Saharan African region (SSA). The first article examines the demand side of CA and explores whether urban maize (Zea mays L.) consumers in the Democratic Republic of the Congo (DRC) would be willing to pay a premium for CA-produced maize flour. The second article estimates the effects CA provides to adopters and their farms in smallholder farming systems in the DRC, focusing on changes in soil properties and cowpea (Vigna unguiculata) yields. The final article uses a Life Cycle Assessment (LCA) approach to monetize the environmental impacts of adopting CA in South African wheat (Triticum aestivum L.) commercial farming. The following findings emerge from this dissertation: (1) With few exceptions, urban DRC consumers were not willing to pay a premium for white maize flour produced with CA technique; (2) CA was shown to improve soil health, via increasing earthworms populations, soil quality via greater concentrations in soil available P and K, and cowpea yields when compared to conventional farming in the DRC; and (3) CA was more profitable and had a greater environmental efficiency (yield output per dollar of environmental damage) than conventional wheat production in South Africa. The results of this CA adoption research illustrated the production side benefits of adopting sustainable agricultural production but also showed a gap in the consumer demand side of the food systems equation for CA in SSA.
Mulimbi, W. (2022). Assessing Consumer Demand, Producer Profitability, and the Environmental Impacts of Conservation Agriculture Adoption in Sub-Saharan Africa. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/4645