Cold hardiness level of arborvitae subjected to different soil water conditions
Cold hardiness level (expressed as lowest temperature ° C tolerated without severe injury) | ||||||||
---|---|---|---|---|---|---|---|---|
Water Treatment ml/pot | Experiment 1 (1977 study) | Experiment 2 (1978 study) | ||||||
Date tested | ||||||||
10/6 | 10/21 | 11/2 | 10/2 | 10/16 | 11/3 | 11/13 | 12/14 | |
400 | –13 | –18 | –24 | –9 | –18 | –27 | —36z | -57z |
100 | –17 | –18 | –27 | –12 | –24 | –24 | –33 | –57z |
50 | –10 | –18 | –24 | –9 | –18 | –24 | —36z | –48y |
100-400 Oct. 1 | — | — | –24 | –27 | –36z | –57z | ||
100-400 Oct. 15 | — | –24 | –36 | –57z | ||||
100-400 Nov. 1 | — | — | — | -36z | -57z | |||
50-400 Oct. 1 | — | –18 | –21 | –36z | –57z | |||
50-400 Oct. 15 | — | — | –18 | –36z | –57z | |||
50-400 Nov. 1 | — | — | –33 | — 51x |