KEY TO TREATMENTS AND ABBREVIATIONS
Harvard Forest DIRT Plots (Abbreviation: HF)
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Treatment
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Abbreviation
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Description
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Double litter
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2X
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Receives ambient above-ground litter plus litter from OX plot
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No litter
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X
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Above-ground litter inputs are excluded and are added to 2X plot
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No roots
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T
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Root inputs are excluded by means of lined trench
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No inputs
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TOX
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Combination of NO LITTER and NO ROOTS treatments
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O/A-less
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O/A-
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O and A horizons initially replaced with B horizon material
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Control
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C
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Receives normal above- and below-ground inputs
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Block
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Position
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I
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downslope
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II
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midslope
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III
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upslope
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