TILLAGE AND NUTRIENT SOURCE EFFECTS ON WATER QUALITY FROM FLAT LANDS Image Date Issued 2002 Author Thoma, D. P. Gupta, Satish C. Strock, Jeffrey S. Moncrief, John F. Main Topic Water Economics
Nitrate and water present in and flowing from root-zone soil Date Issued 1996 Author Weed, D.A. J. Kanwar, R. S. Main Topic Water Economics
