Principal author of seven books. Author of chapters in 11 other books, of more than 50 scientific and popular publications, and of hundreds of research and advisory reports. The titles are presented in a PdF-file that can be downloaded (click on the link). They are organized under the headings below, which illustrate my fields of interest, knowledge and experience. The publications are sent on request as far as digital versions are available.
Biological / sustainable agriculture
Crop & livestock intensification
Environment and development
Integrated soil fertility management
Legumes (in rangelands and crop production)
Range land management
Soil amendments and fertilizer