||Agricultural NPS Control of Phosphorus in the New York State, Lake Ontario Basin. Volume 3. The Influence of Tillage on Phosphorus Losses from Manured Cropland.
Robillard, P. D. ;
Walter, M. F. ;
||New York State Coll. of Agriculture and Life Sciences, Ithaca. Dept. of Agricultural and Biological Engineering.;Environmental Protection Agency, Chicago, IL. Great Lakes National Program Office.
||EPA-R005725-01/02; EPA/905/9-91/006C ; GL-06C/91
Agricultural runoff ;
Lake Ontario ;
Nonpoint sources ;
New York ;
Farm wastes ;
Field tests ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A sprinkling infiltrometer was used to evaluate total phosphorus (TP) and total soluble phosphorus (TSP) losses in surface runoff from plots receiving manure application rates of 22-135 MT/ha and from plots where manure had been incorporated to depths varying from 0-20 cm. Both laboratory and field trials were conducted utilizing simulated precipitation. Infiltrometer runs were repeated for various drying conditions of the soil manure mixture at time intervals varying from 1-30 days. Significantly higher TP and TSP loads in surface runoff were associated with surface applications of manure immediately followed by a precipitation event. For the standard 12-cm, 60-minute event, TP and TSP loads were as high as 13.4 and 7.7 kg/ha, respectively. These loads were 20-25 times greater than observed TP, TSP loads from control plots.