The effects of harvesting at three heights of cutting and four stages of development on the crude protein content and crude protein yield of intermediate wheatgrass, Agropyron intermedium (Host.) Beauv., bromegrass, Bromus inermis Leyss., and reed canarygrass, Phalaris arundinacea L., were studied on irrigated land. Reed canarygrass had a higher crude protein content at clip 1 than bromegrass, which in turn contained more than intermediate wheatgrass. Grass cut at the vegetative and shotblade stages of development contained more protein than that cut at either the flower or seed stage. Neither species nor stage of growth at the time of taking the initial harvest had a consistent influence on the yield of crude protein.