Introduction

This part introduction presents an overview of the key concepts discussed in the subsequent chapters. The part outlines the prospects for plants and describes the contributions of livestock to the world supply of food. It suggests that food from animal products is very important to the protein supply, and it indicates that animal products will continue to be important in the future. With plants preeminent in meeting world food needs, it is important to assess the maximum genetic yield potential of crop species and to consider the value of adding new species. The part presents a series of suggestions for US policy which could affect both national and international welfare. It discusses that future expansion must come from well-managed but limited stocks of "traditional" species and from increased usage of "non-traditional" species. A major problem with the husbandry of this source of food lies in the lack of research and development support, which has never been sufficient.