Management Intensive Rotational Grazing (MIRG): This system is designed to represent a custom heifer raising operation. Heifers are brought on to pasture at the beginning of May and then returned to the UW’s herd at the end of the season (October) to re-enter the milking herd. Managed grazing is used to maximize the productivity and health of both the heifers and pasture. Fertility is derived from biologically fixed N and manure as well as applied synthetic N, P, and K on an “as needed” basis. Red clover is seeded biennially or as needed to maintain a 35% legume stand in the cool season grass sward.