VA mycorrhiza management : a new, low cost, biological technology for crop and pasture production on infertile soils
Consistent policy formulation within a skewed farm size distribution: the small farmer in Latin America
The biology and control of purple nutsedge (Cyperus rotundus L.): Study guide to be used as a supplement to the Audiotutorial Unit in the same topic
Practicas de manejo del hato de cria en las sabanas bien drenadas de Colombia y Venezuela: Guia de estudio
Methods and timing of fungicide application to control rice blast (Bl) under favorable upland conditions in Colombia
The animal production potential of four associations between Andropogon gayanus Kunth and legumes in the Eastern Plains in Colombia