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Title: Provisional tree and shrub seed zones for the Great Plains
Author: Cunningham, Richard A.;
Source: Res. Pap. RM-150. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 15 p
Publication Series: Research Paper (RP)
Description: Seed collection zones are subdivisions of land areas established to identify seed sources and to control the movement of seed and planting stock. Seed zones are needed for many species because of the genetic variation associated with their geographic distribution. Zone boundaries may be delineated from experimental data that identify genetic variation, or by analysis of the environmental factors that most likely acted as selective forces in creating such genotypic variation.
Keywords: seed collection, Great Plains
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Cunningham, Richard A. 1975. Provisional tree and shrub seed zones for the Great Plains. Res. Pap. RM-150. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 15 p
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