The goal of animal breeders in the 20th century was to develop types of animals that would meet market demands, be productive under adverse climatic conditions, and be efficient in converting feed to animal products. At the same time, producers increased meat production by improved range management, better feeding practices, and the eradication of diseases and harmful insects. The world production of meat has been increasing steadily since World War II. While the number of livestock in relation to the human population is not significantly lower in less-developed than in more-developed regions, there is much lower productivity per animal and ...(100 of 27369 words)