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United States Department of Agriculture

Agricultural Research Service

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AFSRC Picture of the Week, February 11, 2008
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Employee collecting leachates
Studies of inputs to belowground are important to the understanding of soil organic matter dynamics in Appalachian silvopastures. AFSRC Biologist Harry W. Godwin collects leachate from senesced tree leaves of white oak (Quercus alba L.), sugar maple (Acer saccharum), and yellow poplar (Liriodendron tulipifera L) after a rain event in the autumn of 2007. Data indicates that carbon and phenolics content are much higher than that of control water (rainfall or snowmelt from an open area). The pH values increase from 4.2 in control water to 6.8 in leachate collected from yellow poplar. The leachates vary in color from clear to deep orange.
 
Photo by Wade Snyder

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Last Modified: 2/13/2008