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. 2020 Mar 27;11:360. doi: 10.3389/fpls.2020.00360

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Copyright © 2020 Li, Schmidt, LaHue, Lazicki, Kent, Machmuller, Scow and Gaudin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The distribution of soil available (A,B) nitrogen (N), (C) phosphorus (P), and (D) potassium (K) in subsurface drip irrigation (SDI) and furrow irrigation (FI) systems. Ammonium-N and nitrate-N were collected in August, and Olsen-P and exchangeable K were obtained in June. An asterisk on the left side of the plot represents a significant treatment difference (p < 0.05) at all distances across the bed, while an asterisk above one point represents a significant treatment difference at one distance.