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Ryegrass Types for Pasture and Hay - http://www.uwex.edu/ces/forage/pubs/ryegrass.htm
Notes on the different varieties, including hybrids, and their use in the USA. |
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Perennial Ryegrass - http://extension.oregonstate.edu/catalog/html/pnw/pnw503/
A compendium of technical information on the use of ryegrass for pasture. |
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Perennial Ryegrass Seed Production in Western Canada - http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex8345?opendocument
An examination of the suitability of perennial ryegrass for forage and seed production in Western Canada. |