Mackay River Herbicide Trial: Conifer Response 9 Years Post-treatment

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Ministry of Forests, Research Program, Jan 1, 1997 - Forest site quality - 26 pages
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.

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Contents

Methods
3
Discussion
16
Type III sum of squares mean squares
22
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