@article{vose_preliminary_1990,
	title = {Preliminary estimates of foliar absorption of 15N-labeled nitric acid vapor ({HNO}3) by mature eastern whitepine ({Pinus} strobus).},
	volume = {20},
	url = {http://cwt33.ecology.uga.edu/publications/338.pdf},
	abstract = {We used a direct approach to quantify foliar N absorption by exposing foliage of mature eastern white pine (Pinus strobus L.) to 15N-labeled nitric acid vapor(HNO3). Foliage on terminal portions of branches in a 31-year-old white pine plantation was enclosed in 9.0-L teflon film branch cuvettes and exposed to 10, 50, and 100 ppb H15NO3 for 12-30 h. Foliar absorption rates ranged from 0.026mg 15N/g/h at 10 ppb to 0.267 mg 15N/g/h at 100 ppb.  Extrapolation to the entire canopy resulted in an estimated absorption of 0.30-0.50 kg N/ha/year at ambient HNO3 concentrations. In contrast, canopy input-output estimates for the same forest stand indicated a depletion of 2.3 kg N/ha/year by the forest canopy.},
	journal = {Canadian Journal of Forest Resources},
	author = {Vose, J.M.},
	year = {1990},
	keywords = {CWT}
}

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