SARE » Products » Systems Research for Agriculture » Chapter One: Introduction to Agricultural Systems and Agricultural Systems Research: A Paradigm Change » Understanding Agricultural Systems » Key Concepts of Agricultural Systems Systems Research for Agriculture Key Concepts of Agricultural Systems SARE Outreach Laurie E. Drinkwater, Diana Friedman, Louise Buck | 2016 | 96 pages PDF (1.8 MB) Order in Print $20.00 or call (301) 779-1007 to order.