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United States Department of Agriculture

Agricultural Research Service

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AFSRC Picture of the Week, September 29, 2008
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Leachate Samples with fluorescence data

Quality and quantity of inputs to soils are important to the understanding of nutrient cycling and soil organic matter dynamics in Appalachian silvopastures. AFSRC scientists collected leachates from senesced tree leaves of white oak (Quercus alba L.), red maple (Acer rubrum), and yellow poplar (Liriodendron tulipifera L) during fall and winter 2007 after rain or snowmelt. Fluorescence of excitation emission matrices spectra show some of the differences of the dissolved organic matter from the collected leaves.

Photos by Susan Boyer and graphs by Diane Snuffer

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Last Modified: 10/3/2008
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