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. 2013 Dec 23;14(1):212–228. doi: 10.3390/s140100212

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 1. — ICON experimental field design with core and supplementary fields. Each contain twelve fields with four crop rotations triplicated and three different nitrate fertilizer treatments (Z = zero-N, S = site-specific and C = conventional). Two containers house the sampling system and analytical devices. Pink shaded fields are connected to the system in container one and blue fields to the system in container two. Fields are separated by bunds or plastic sheets inserted 0.3 m into the ground.