Since 1944, the National Research Council (NRC) has published seven editions of the Nutrient Requirements of Beef Cattle. This reference has guided nutritionists and other professionals in academia and the cattle and feed industries in developing and implementing nutritional and feeding programs for beef cattle. The cattle industry has undergone considerable changes since the seventh revised edition was published in 2000 and some of the requirements and recommendations set forth at that time are no longer relevant or appropriate. The eighth revised edition of the Nutrient Requirements of Beef Cattle builds on the previous editions. A great deal of new research has been published during the past 14 years and there is a large amount of new information for many nutrients. In addition to a thorough and current evaluation of the literature on the energy and nutrient requirements of beef in all stages of life, this volume includes new information about phosphorus and sulfur contents; a review of nutritional and feeding strategies to minimize nutrient losses in manure and reduce greenhouse gas production; a discussion of the effect of feeding on the nutritional quality and food safety of beef; new information about nutrient metabolism and utilization; new information on feed additives that alter rumen metabolism and postabsorptive metabolism; and future areas of needed research. The tables of feed ingredient composition are significantly updated. Nutrient Requirements of Beef Cattle represents a comprehensive review of the most recent information available on beef cattle nutrition and ingredient composition that will allow efficient, profitable, and environmentally conscious beef production. Table of Contents Front Matter Summary

This report investigates the situation of pastoralism, highlighting its current context of vulnerability. It outlines policy interventions, resilience programming, and research areas that could enhance the resilience of pastoral livelihoods systems. Pastoral livestock production is practised in an area representing 43 percent of Africa's land mass, and in some regions it represents the dominant livelihood system. It covers 36 countries, stretching from the Sahelian West to the rangelands of Eastern Africa and the Horn and the nomadic populations of Southern Africa, with an estimated 268 million pastoralists. Pastoralism developed 7000 years ago and spread throughout Northern Africa as an adaptation to a rapidly changing and increasingly unpredictable arid climate. It remains an important solution, as it allows pastoral herds to use drier areas during the wet season and more humid areas during the dry season. It thereby ensures access for pastoral livestock to sufficient high-quality grazing and creates economic value.

Animal acupuncturist. Zoo designer. Wildlife rehabilitator.
Working with animals can involve much more than helping at an animal shelter or grooming dogs. There are lots of different jobs out there for people who share a deep concern for the welfare of animals. Authors Michele C. Hollow and Dr. William P. Rives give you the inside scoop on all of them, including:

• Veterinarian and veterinary technician
• Zoo worker
• Animal trainer for movies and TV
• Beekeeper
• Guide dog trainer

This unique career guide features personal stories from experts in the field, including a large-animal surgeon, a professional dog trainer, an animal behaviorist, and the former president and CEO of the American Society for the Prevention of Cruelty to Animals. This guide gives you everything you need to find a job that fits your animal-loving personality.