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. 2019 Aug 16;10:1029. doi: 10.3389/fpls.2019.01029

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Copyright © 2019 Wacker-Fester, Uptmoor, Pfahler, Dehmer, Bachmann-Pfabe and Kavka

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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Relationship (linear regression) between P content and total root length of the potato cultivars Amsel (circle), Gesa (square), Paterson’s Victoria (diamond), and Weinberger Schloßkipfler (triangle) fertilized with KH₂PO₄ (HP, green), C₆H₁₆CaO₂₄P₆ (OP, blue), or without P supply (LP, red) and across all fertilizers (black, dashed line). Regression equations, multiple R ² and p values are given. Individual symbols are individual plants.