This book, Biological Soil & Water Conservation: The Vetiver-grass as an Example, is one example.
The book is a simple orientation about using vetiver Grass as a straightforward method of applying biological soil and water conservation methods in smallholder farmers' environments. The focus is mainly on African environments, from which he collects most of his examples, but there are also examples from Iraqi Kurdistan, Iran, India, Sri Lanka and Sweden.
The material and the level are meant to be suitable as an orientation and introduction for non-specialist students in, for example, Physical and Human Geography, Geology, and Sustainability Studies, and as a general background for various project administrators who need an elementary introduction to biological soil and water conservation methods.