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. 2019 Nov 18;10:1369. doi: 10.3389/fpls.2019.01369

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Copyright © 2019 Saloner, Sacks and Bernstein

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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Visual appearance of leaves of two medical cannabis cultivars, RM (top row) and DQ (bottom row), which developed on plants receiving increasing K supply. From left to right: 15, 60, 100, 175, and 240 ppm K. Images of the youngest fully developed leaf on the main stem, taken 26 days after the initiation of the fertigation regime.