Soil Standards for Planting Wisconsin Conifers
Abstract:Because of the previous depletion of soils by fires, farming, or erosion, many Wisconsin forest plantations now show a rate of growth inadequate to return the accrued cost of planting and current expenses. To reduce in the future financial liabilities, soils and growing stock of 315 plantations were subjected to field and laboratory analyses. The results provided sufficient information to determine the minimum levels of soil fertility factors satisfying the requirements of jack pine, red pine, white pine, and white spruce. The critical levels were established as averages of the least values whose C quotient (±x/d) is smaller than 0.05 probability. The significance of these levels in terms of the expected site index was checked by multiple correlation equations. On short rotations the minimum annual increment promised by the suggested soil fertility standards is between 0.5 and 0.7 cords per acre.
Document Type: Journal Article
Affiliations: Professor of Soil Science, University of Wisconsin, Madison
Publication date: 1966-06-01
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