Walsh is the first cultivar of western wheatgrass(Agropyron smithii Rydb.) to be released in Canada. It was developed at the Agriculture Canada Research Station, Lethbridge, Alberta. The cultivar is an improved selection of the native species, which is adapted to heavy clay soils, is drought-tolerant, hardy, and creeping-rooted. The grass is noted for its tolerance to salinity and its ability to grow and yield well on spring-flooded clay sites.
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Smoliak et al. (1983) studied this question.