Intensification of agriculture has raised public concerns over the environmental, economic, and social, impacts of modern agricultural enterprises. In Michigan, potato production has become more intensive as urbanization and land values have increased in potato producing areas. An increased reliance on short, intensive rotations that maximize the frequency of high value potato crops has resulted in compromises to the systems long-term productivity. By spreading manure over a larger land base and diversifying cropping systems with perennial crops, both crop and livestock operations may be able to increase their long-term sustainability. Forage crops as 1-year and 2-year stands were incorporated into potato rotations to determine effects on potato and forage yield and quality on a site historically predominated by intensive potato rotations. 2-year potato (Solanum tuberosum) rotations with alfalfa (Medicago sativa) and sorghum-sudangrass (Sorghum bicolor x S. bicolor) and 3-year potato rotations with 2-year stands of alfalfa and festulolium (Festuca pratensis x Lolium perenne) were compared to the regionally common 2-year corn (Zea mays) - potato rotation. Liquid dairy manure was applied at 12,260 L ha-1 and evaluated against equivalent conventional mineral fertilizer applications balanced to available nitrogen. Forage crop rotation and manure application was found to increase soil N levels and potato petiole N throughout the growing season in 2003. Environmental conditions in 2004 were found to mitigate these effects until late in the production year. The combination of manure and crop rotation produced the most significant increases to potato yields. C4 grass residues of corn and sudex were most effective as rotation crops. Additions of high quality crop rotations and manure amendment hold the potential to improve N synchrony with potato demand and increase potato yield.