2008 Joint Annual Meeting (5-9 Oct. 2008): Assessing Scale Effects on Derived Estimates of the Impacts of Manure and Tillage Management on Water Quality.
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538-14 Assessing Scale Effects on Derived Estimates of the Impacts of Manure and Tillage Management on Water Quality.



Monday, 6 October 2008
George R. Brown Convention Center, Exhibit Hall E
Francirose Shigaki1, Peter Kleinman1, Tamie Veith1, Douglas Beegle2 and Keisha Johnson3, (1)USDA - ARS, 3702 Building, Curtin Road, University Park, PA 16802
(2)116 Ag Sciences & Industries Building, Pennsylvania State Univ., Pennsylvania State University, Dept of Crop and Soil Sciences, University Park, PA 16802-3504
(3)The Pennsylvania State University, University Park, PA 16801-4336
The application of manure to no-till soils is a concern to off-site
phosphorus (P) transport as surface applied manure P is highly
vulnerable to runoff water. New technologies to inject or improve
manure incorporation hold promise, but little consensus exists on
what methods best represent runoff losses.  We compared runoff data
collected via three method: rainfall simulation on 2-m wide plots
with either 2 or 10 m flow paths; and and natural runoff from 100 m2
field plots. Rainfall simulation protocols tend to inflate the effect
of certain hydrological and chemical process, resulting in findings
that are not necessarily consistent with those observed with field
monitoring.  Understanding how rainfall simulation results compare
with field and farm scale evaluations remains a major hurdle in the
conservation effects assessment process.
See more of: Symposium --Biogeochemistry of Relationships Among Soil Nutrients, Organic Carbon, and Water Quality: I (includes Graduate Student Competition) (Posters)
See more of: A05 Environmental Quality