Article Figures & Data
Figures
- Figure 1.
Root spread across the row related to dbh for cultivars of Amelanchier ‘Cumulus’ (AmCu), Autumn Brilliance® (AmAb), and ‘Snowcloud’ (AmSc); Malus Harvest Gold® (MlHg) and ‘Professor Sprenger’ (MlPs); Pyrus calleryana ‘Autumn Blaze’ (PyAb) and Chanticleer® (PyCh); and Syringa reticulata ‘Ivory Silk’ at Nittany (SyIn), ‘Ivory Silk’ at PenCor (SyIp). Regressions for Amelanchier, small dashed line, Y = 11.9 (dbh) + 66.2, R2 = 76%; Malus, long dashed line, Y = 14.5 (dbh) + 97.2, R2 = 72%; and Syringa, solid line, Y = 21.9 (dbh) + 85.3, R2 = 78%.
- Figure 2.
Root spread along the row related to dbh for cultivars of Amelanchier ‘Cumulus’ (AmCu), Autumn Brilliance® (AmAb), and ‘Snowcloud’ (AmSc); Malus Harvest Gold® (MlHg) and ‘Professor Sprenger’ (MlPs); Pyrus calleryana ‘Autumn Blaze’ (PyAb) and Chanticleer (PyCh); and Syringa reticulata ‘Ivory Silk’ at Nittany (SyIn), ‘Ivory Silk’ at PenCor (SyIp). Regressions for Amelanchier, small dashed line, Y = 21.1 (dbh) + 62.1, R2 = 86%; Malus, long dashed line, Y = 8.9 (dbh) + 206.7, R2 = 91%; and Syringa, solid line, Y = 32.6 (dbh) + 62.0,R2 = 75%.
- Figure 3.
Root depths related to dbh for culivars of Amelanchier ‘Cumulus’ (AmCu), Autumn Brilliance® (AmAb), and ‘Snowcloud’ (AmSc); Malus Harvest Gold® (MlHg) and ‘Professor Sprenger’ (MlPs); Pyrus calleryana ‘Autumn Blaze’ (PyAb) and Chanticleer (PyCh); and Syringa reticulata ‘Ivory Silk’ at Nittany (SyIn), ‘Ivory Silk’ at PenCor (SyIp). The regression Y = 2.35 (dbh) + 35.86, slope is significant at = 0.0001, R2 = 0.30; root MSE = 15.3; standard error of slope = 0.55.
- Figure 4.
Proportion of root biomass stored inside a standard root ball for individual trees of Amelanchier, Malus, Pyrus, and Syringa cultivars. Proportions regressed against diameters (dbh), Y= −0.0374 (dbh) + 0.97, R2 = 0.37, root MSE = 0.210, significant at = 0.
Tables
- Table 1.
Means of the root spread along rows and across rows, and deepest roots, with corresponding average dbh and height of cultivars of Amelanchier, Malus, Pyrus, and Syringa, located in three nurseries (C = College Gardens, N = Nittany Trees, P = PenCor nurseries), and along a Borough of State College street (B).
Cultivar Location Number Along the row (cm) Across the row (cm) Depth (cm) Dbh (cm) Height (m) A. Autumn Brilliance® C 5 198.2 154.0 24.8 3.86 3.83 A. ‘Cumulus’ B 6 406.2 262.0 69.3 16.08 6.41 A. ‘Snowcloud’ C 5 89.6 68.0 48.4 4.16 4.03 M. Harvest Gold® N 5 270.8 202.2 67.6 7.11 4.38 M. ‘Professor Sprenger C 5 240.0 150.0 35.0 3.81 3.02 P. ‘Autumn Blaze’ C 5 223.0 193.4 60.4 4.62 3.57 P. Chanticleer® N 5 155.6 107.4 55.0 5.28 3.83 S. ‘Ivory Silk’ N 5 279.2 234.0 58.8 6.65 3.67 S. ‘Ivory Silk’ P 5 402.2 311.0 50.0 10.46 4.57
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