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Study of agricultural watersheds and carbon losses
Date:6/19/2009

er daily drainflows were associated with higher DOC concentrations compared to lower daily drainflows. This indicates that larger storms effectively "flush" DOC from the soil systems.

Dr. Matt Ruark, now an Assistant Professor at the University of Wisconsin-Madison, stated, "Understanding the concentrations and amounts of DOC contributed to surface waters from tile drains is essential for evaluating the overall aquatic ecology of a watershed. This is of particular importance in the eastern corn belt, where up to 80% of the land in agricultural watersheds are tile drained."

Further research is required to evaluate the fate of tile drainageexported DOC once it enters the surface water system. The effect of manure management on the availability of DOC leached into subsurface soil is currently being investigated. Ongoing research at the water quality field station is being conducted to quantify nutrient and contaminant losses in tile drains as a result of manure application and crop rotation.


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Contact: Sara Uttech
suttech@crops.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

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