ABSTRACT
Cattle management and production on the extensive rangelands of tropical Colombia contrast sharply with those on the High plains of Colorado. Winter feeding of cows on low-cost cornstalk residue pastures has required heavier stocking rates on native pastures during summer and less during winter, with less dependence on hay and other supplements in winter. In addition to the impact of crop residues, broad changes have been made through crossbreeding cattle and the introduction or reintroduction of many breeds. Latin American neighbors also have a great stake in the cattle industry, for many of the same reasons as their own. Brunnschweiler implied that the region of the Carimagua ranch was more heavily populated in Spanish colonial times. The herd-systems experiment included experimental, demonstrational, and commercial types of activities. Particular attention is given to how nutrition is associated with conceptions, abortions, and calving rates. The mineral-fed heifers continued to outperform the nonmineral-fed herds in body weight.
