Foliar and fine root nitrate reductase activity in seedlings of four forest tree species in relation to nitrogen availability. Downs, M., Nadelhoffer, K. J., Melillo, J., & Aber, J. Trees, Structure and Function, 1993.
bibtex   
@article{downs_foliar_1993,
	title = {Foliar and fine root nitrate reductase activity in seedlings of four forest tree species in relation to nitrogen availability},
	volume = {7},
	journal = {Trees, Structure and Function},
	author = {Downs, MR and Nadelhoffer, K. J. and Melillo, J.M. and Aber, J.D.},
	year = {1993},
	keywords = {HFR, LTER1}
}

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