04 Dec 2013
Phosphorus Balance Trends on Agricultural Soils of the Lake Erie Drainage Basin
Laura Lindsey (Bast), Robert Mullen, Ivan O’Halloran, Darryl Warncke, and Tom Bruulsema
![](http://media.ipni.net/image/IPNI2013TBR02-1595-P.jpg)
Only a few decades ago, optimum plant nutrition involved applying more P than crops removed. In recent years, applications have come much closer to balancing removals. This trend has positive implications for both crop productivity and water quality.