作者: R. A. Leng , T. R. Preston
DOI:
关键词: Subtropics 、 Production (economics) 、 Biology 、 Matching (statistics) 、 Livestock farming 、 Agroforestry 、 Ruminant 、 Resource utilization 、 Livestock 、 Tropics
摘要: In developing countries the productivity of meat and milk producing animals is low compared with that of the livestock in developed countries, and the availability of meat and milk per …