Root weight and distribution of Pyrus calleryana ‘Glen’s Form’ grown in three container types (black plastic, Root Pouch, and Smart Pot) and harvested after one, two, and three years following planting in the landscape.
| Harvest year | Container type | Total root ball dry weight (g) | Total dry weight root growth outside root ball (g) | Total dry weight roots inside root ball (g) | Total fine roots (<2.0 mm) inside root ball (g) | Total coarse roots (≥2.1 mm) inside root ball (g) | Total fine roots (<2.0 mm) outside root ball (g) | Total coarse roots (≥2.1 mm) outside root ball (g) | Total fine roots (g) | Total coarse roots (g) |
|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | Black plastic | 1248.2 | 105.9 | 1142.3 | 161.6 | 980.7 | 25.8 | 80.1 | 187.4 | 1060.8 |
| Root Pouch | 1083.7 | 117.9 | 965.7 | 112.7 | 853.0 | 24.4 | 93.5 | 137.1 | 946.5 | |
| Smart Pot | 1235.5 | 125.5 | 1113.0 | 147.0 | 966.1 | 33.4 | 92.1 | 180.4 | 1058.1 | |
| 2012 | Black plastic | 2984.4 | 642.7 | 2341.7 | 45.5 | 2296.3 | 50.8 | 591.8 | 96.3 | 2888.1 |
| Root Pouch | 2621.1 | 779.8 | 1841.3 | 34.3 | 1807.0 | 55.1 | 724.7 | 89.3 | 2531.8 | |
| Smart Pot | 2704.3 | 749.7 | 1954.3 | 33.7 | 1920.6 | 49.1 | 700.6 | 82.8 | 2621.2 | |
| 2013 | Black plastic | 5875.3a | 1655.4 | 4220.0a | 32.5 | 4187.5a | 93.0a | 1562.4 | 125.5a | 5749.9a |
| Root Pouch | 4719.4b | 1660.0 | 3059.4b | 26.8 | 3032.6b | 92.8a | 1567.2 | 119.7a | 4599.8b | |
| Smart Pot | 4395.1b | 1638.1 | 2757.0b | 35.9 | 2721.1b | 192.3b | 1445.8 | 228.2b | 4166.9b | |
Note: Means within years for each measurement followed by different letters are significantly different at P = 0.05 using Tukey’s LSD test.