Effect of tillage systems on runoff losses of nutrients, a rainfall simulation study Date Issued 1978 Author Barisas, S. G. Baker, James L. Johnson, H. P. Laflen, John M. Main Topic Water Economics
Water Resources Data for Minnesota Water Year 1977 Image Date Issued 1978 Author US Geological Survey Main Topic Groundwater Surface Water Water Use & Availability Water Education, Outreach & Community Capacity
