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Water Requirements for Range Plant Establishment

by Gary W. Frasier, USDA, Tifton, GA, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

A conceptual model was developed which describes a series of pathways or transition sequences which a seed or seedling may follow during the initial wet-dry-wet periods after planting. Associated with each pathway is an occurrence probability related to the plant's response to a wet or dry environment and the relative lengths of the initial wet and dry periods. In most instances, the most probable response pathway can be determined from the relative seedling counts at selected times during a set of short-term experiments, which include a wet-dry watering sequence and an everyday wet watering sequence. The model was validated using data collected in greenhouse and field studies evaluating seedling establishment characteristics of selected warm season range grasses.

Subject Headings: Water use | Vegetation | Field tests | Water demand | Validation | Seasonal variations | Rangeland

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