Relative root DW | Y = 76.2 − 1.35X + 0.01X^{2} | *R*^{2} = 0.92 | Y = 79.6 − 4.85X + 0.12X^{2} | *R*^{2} = 0.98 | Y = 91.6 − 5.29X + 0.12X^{2} | *R*^{2} = 0.86 |

Shoot: root ratio | Y = 2.61 + 0.02X − 0.003X^{2} | *R*^{2} = 0.94 | Y = 3.94 + 0.09X − 0.004X^{2} | *R*^{2} = 0.75 | Y = 2.29 + 0.08X − 0.002X^{2} | *R*^{2} = 0.70 |

Relative growth index | Y = 87.5 − 0.20X − 0.01X^{2} | *R*^{2} = 0.96 | Y = 89.6 − 0.98X + 0.01X^{2} | *R*^{2} = 0.81 | Y = 88.3 − 1.98X + 0.05X^{2} | *R*^{2} = 0.76 |

Chlorophyll index (SPAD) | Y = 70.1 − 0.94X − 0.01X^{2} | *R*^{2} = 0.99 | Y = 55.1 − 0.76X − 0.01X^{2} | *R*^{2} = 0.96 | Y = 58.3 + 0.27X − 0.01X^{2} | *R*^{2} = 0.36 |

Salt burn rating | Y = 0.465 + 0.166X | *R*^{2} = 0.99 | Y = 0.179 + 0.062X | *R*^{2} = 0.99 | Y = 0.064 + 0.038X | *R*^{2} = 0.99 |

*Relative plant DW and salt burn relationship to leaf Na* |

Relative plant DW | For all cultivars, Y = 81.9 − 0.021X + 2.5x10^{−6} X^{2} *R*^{2} = 0.68 |

Salt burn rating | Y = 0.403 + 0.0018X − 1.8x10^{−7}X^{2}
*R*^{2} = 0.90 | Y = 0.222 + 0.0004X − 2.2x10^{−8}X^{2}
*R*^{2} = 0.91 | Y = 0.017 + 0.0005X − 4.5x10^{−8}X^{2}
*R*^{2} = 0.77 |

*Relative plant DW and salt burn relationship to leaf Cl* |

Relative plant DW | For all cultivars, Y = 16.8 + 240.1X − 240.7X^{2} + 83.4X^{3} − 9.6X^{4} *R*^{2} = 0.79 |

Salt burn rating | Y = 0.210 − 1.03X + 1.17X^{2}
*R*^{2} = 0.69 | Y = 0.102 + 0.10X + 0.12X^{2}
*R*^{2} = 0.81 | Y = 0.249 − 0.68X + 0.51X^{2}
*R*^{2} = 0.65 |