Describes a 1986 field trial in which investigators applied four different treatments (glyphosate, 2, 4-D amine, 2, 4-D ester, and manual brushing) in an incomplete block design to a four-year-old fireweed/shrub community in the Mackay River drainage, south-west British Columbia. The purpose of the trial was to evaluate the effectiveness of the treatments in releasing hybrid spruce seedlings. Competing vegetation species, their height, and percent cover were determined in 1986-87 and 1995. The trial was re-measured in 1995 to determine whether there were any long-lasting effects of treatment on growth and condition of planted spruce seedlings. Statistical analyses were used to determine differences in spruce seedling root collar diameter, crown diameter, height, and height growth increments.In 1993, seedlings from the 2, 4-0 amine plots were significantly taller than those from the manual cutting plots; however, ... (cm) 1995 1993 1991 1989 1987 Control 41.4*bt 96.2bc 199.8b 141.0bc 102.9a 69.7a 42.4a 13.2** 25.1 58.5 40.7 29.1anbsp;...
|Title||:||Mackay River Herbicide Trial|
|Author||:||George James Harper, Balvinder Singh Biring, Jean Heineman|
|Publisher||:||British Columbia, Ministry of Forests, Research Program - 1997-01-01|