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  • 1 Colorado State University, Department of Horticulture, and Denver Cooperative Extension Service, Fort Collins, CO 80523

Four woody plant species were grown during the 1988 and 1989 growing seasons under three irrigation treatments at two sites in two soil types. The three irrigation treatments which were implemented included: 1) control, 2) drip irrigated with no water stress, and 3) drip irrigated with water stress. Rainfall and additional water applied during the 1988 and '89 growing seasons were recorded. Analysis of this data showed the no stress treatment receiving more water at both sites, especially in 1989. After two years of growth, no statistical differences in new growth (height) were observed with any plant species evaluated at either site from the three water treatments. Comparing new growth, no statistical differences were observed except with Juniperus sabina. No visual differences were observed with Ribes alpinum and Cornus sericea. Visual differences were observed with Potentilla fruticosa and Juniperus sabina. The experiment will be continued during the 1990 growing season.

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