@article {JRN55333,
	title = {Nitrogen dynamics after low-emission applications of dairy slurry or fertilizer on perennial grass: a long term field study employing natural abundance of δ15N},
	journal = {Plant Soil},
	volume = {465},
	year = {2021},
	month = {6/9/2021},
	pages = {415{\textendash}430},
	abstract = {Defining the long-term effects of liquid dairy manure (LDM) applied by a recommended low emission method is important to ensure sustainable grass production and dairy operations. We used natural abundance δ15N and conventional measurements in a long term field experiment to better understand the long-term fate of N applied as LDM, mineral fertilizer (MIN) and both (ALT).

Methods
We investigated the effects of long-term applications of LDM (with low-emission trailing shoe), MIN, and alternating LDM and MIN (ALT) on grass N uptake, soil N stocks, N losses and δ15N natural abundance in grass, soil and fine heavy fraction (silt + clay size heavy soil). Nominal annual rates of total N were 200 and 400 kg ha-1 for MIN and 400 and 800 kg ha-1 for LDM.},
	keywords = {Crop N uptake, Fine heavy fraction, Grass herbage, Liquid dairy manure, Mineral fertilizer, Nitrogen use efficiency, Soil N, Δ15N natural abundance},
	doi = {10.1007/s11104-021-04998-7},
	url = {files/bibliography/21-045.pdf},
	author = {H. Zhang and D. E. Hunt and B. Ellert and E. Maillard and Peter J. A. Kleinman and S. Spiegal and D. A. Angers and S. Bittman}
}
