Site Preparation For Intensively Cultured Hybrid Poplar Plantations
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Research Note NC-320. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Five site preparation treatments consisting of combinations of tillage, contact herbicide (glyphosate), and pre-emergent herbicide (linuron) were tested for their effects on tree survival and growth. Treatments had little effect on tree survival, but effects on second-year-tree height were significant and additive -- i.e., tree height increased as the number of types and repetitions of site preparation increased. Best growth was obtained with a summer fallow-with-herbicide treatment consisting of two applications of glyphosate followed by plowing and repeated disking, plus spring disking and application of linuron at planting time. A comparable growth response was obtained from the less intensive fall-plow treatment consisting of one application of glyphosate followed by plowing and disking, plus spring disking and application of linuron at planting time. The least effective treatment was no-till, presumably because of lowered soil temperatures.
KeywordsIntensive culture weed control glyphosate linuron no-till tillage fallowing plantations establishment
Hansen, Edward; Netzer, Daniel; Rietveld, W.J. 1984. Site Preparation For Intensively Cultured Hybrid Poplar Plantations. Research Note NC-320. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station