The fate of nitrogen in grain cropping systems: a meta-analysis of 15N field experiments. Gardner, J. B. & Drinkwater, L. E. Ecological Applications, 19(8):2167--2184, 2009.
The fate of nitrogen in grain cropping systems: a meta-analysis of 15N field experiments [link]Paper  bibtex   
@article{gardner_fate_2009,
	title = {The fate of nitrogen in grain cropping systems: a meta-analysis of 15N field experiments},
	volume = {19},
	shorttitle = {The fate of nitrogen in grain cropping systems},
	url = {http://www.esajournals.org/doi/abs/10.1890/08-1122.1},
	number = {8},
	urldate = {2015-06-04TZ},
	journal = {Ecological Applications},
	author = {Gardner, Jennifer B. and Drinkwater, Laurie E.},
	year = {2009},
	pages = {2167--2184}
}

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