Untersuchungen zur amphikarpie der tropischen weideleguminose Centrosema rotundifolium Mart. ex Bentham in den Llanos Orientales, Kolumbien
Bean (Phaseolus vulgaris L.) inoculation success as affected by rhizobium strain competition and mobility in soil
Project GLO/91/013 Annual report 1994 Ecologically Sustainable Cassava plant protection in South America and Africa: An Environmentally Sound Approach
Informe final sobre la fase de campo del proyecto doctorado en antropología en San Gil (Santander, Colombia)
Soil fertility dynamics in crop rotation/agropastoral systems ("culti-core" and satellite experiments at Carimagua and Matazul)