A new book comparing rotational grazing and the dairy industry's possible use of synthetic bovine growth hormone (bGH) concludes that rotational grazing would have a more positive effect on the environment. BGH is the controversial hormone that may be approved by the FDA for injection into dairy cows to increase their milk production. Rotational grazing is a system of pasture management that decreases or eliminates confinement feeding and shifts the work of harvesting and maintaining soil fertility back to the animal. "The Dairy Debate: Consequences of Bovine Growth Hormone and Rotational Grazing Technologies," edited by Bill Liebhardt, director of the UC Davis-based UC Sustainable Agriculture Research and Education Program, reports that rotational grazing would increase pasture acreage and decrease grain crop acreage. According to co-author Ed Rayburn, a forage agronomist at West Virginia Extension Service, "Rotational grazing would reduce farm-related environmental problems, resulting in 24 to 31 percent less soil erosion and 23 to 26 percent less fuel use in crop production."