Table 2.

Linear and cubic regression equations and correlation coefficients for tree height and caliper growth 4 years after transplanting. Large-caliper trees averaged 5.5 m in height and 8.4 cm in caliper at transplanting. Small-caliper trees averaged 2.4 m in height and 3.6 cm in caliper when transplanted. High-vigor small trees averaged 2 m in height when lined out, low-vigor small trees averaged 1 m. Five small trees were not transplanted and served as controls. The regression equations were developed from 5, 12, 12, and 5 trees for large-caliper, small-caliper-high-vigor, small-caliper-low-vigor and control trees, respectively.

Regression equationR2
Height, linear
    HL = 4.70 + 0.42T0.46
    HSHV = 1.52 + 0.68T0.92
    HSLV = 1.76 + 0.62T0.95
    HControl = 2.01 + 0.55T0.95
Height, quadratic
    HL = 5.60 − 0.35T + 0.13T20.83
    HSHV = 2.22 + 0.08T + 0.10T20.94
    HSLV = 2.06 − 0.36T + 0.04T20.95
    Hcontrol = 1.76 + 0.76T − 0.037T20.96
Caliper, linear
    CL = 6.76 + 1.06T0.92
    CSHV = 2.42 + 0.86T0.95
    CSLV = 2.22 + 0.88T0.92
Caliper, quadratic
    CL = 8.26 − 0.23T + 0.21T20.97
    CSHV = 2.82 + 0.52T + 0.057T20.95
    CSLV = 3.72 − 0.41T + 0.21T20.99
    CControl = 2.88 + 0.43T + 0.19T20.99

  • HL = height (m) of large-caliper trees

  • HSHV = height (m) of small-caliper high vigor trees

  • HSLV = height (m) of small-caliper low vigor trees

  • HControl m height (m) of untransplanted small-caliper trees

  • CL m caliper (cm) of large-caliper trees

  • CSHV = caliper (cm) of small-caliper high vigor trees

  • CSLV = caliper (cm) of small-caliper low vigor trees

  • CControl = caliper (cm) of untransplanted small-caliper trees

  • T = time in years

  • All equations were significant at the P = 0.01 level.