Photographs of the Chronic Nitrogen Amendment Plots
Harvard Forest, MA
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Pine stand (double photo)
Hardwood stand with Ben Coleman collecting twigs/leaves/tree cores
Knute Nadelhoffer collecting soil cores
Soil core from pine stand, 20 cm depth
Zero tension lysimeter
The shotgun method of fresh foliage collection
Measuring diameter breast height on hardwood high N
Chamber used for measurement of trace gases (CO
2
, N
2
O, CH
4
)
