2005-09-20_REVISION - M1981112 (4)

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~c.~~ ,~~c.. INTERIM ~UiDE UIJITED STATES DEPARTMENT OF AGRICULTURE Soil Conservation Service, Colorado Technical Guide January 1976 Section II E Riverbottom, 63 Type Description and Guide This description and guide is [o be used in MLRAs 49. 67. 69 and 72. It covers native grazing lands in all cottonwood woodland class desig- nations. The potential natural vegetation is classified as Northern Flood plain Forest - 89, Kuchler in the ~r-_i~nai „tlas ;:g. y0 USGS any Forest Coder .~;. .v.,. cr:..._..~_ ;pe 63 Society of American Foresters, I,j-+. Understorv Plant Communities Vegetative composition of the understory of this type consist: of a great many plant species. Total annual understory production varies greatly. Overstory canopy cover, periodic flooding, sediment, water- table, salinity and soils impose significant differences in the nature of grazable plants and initial stocking rates must be made on site at the time of assisting the land users with planning. Forage Preference Ra~ing of Plant Species"" for Cattle Grasses and Grasslike Preferred Desirable Undesirable Western wheatgrass Buffalograss Winter bentgrass Slender wheatgrass Bluejoint reedgrass Foxtail barley Big bluestem Nebraska sedge Scratchgrass Sand bluestem Inland saltgrass Witchgrass Little bluestem Barnyard grass Sleepygrass Blue grama Baltic rush Windmill grass Sideoats grama Indian ricegrass Tumblegrass Prairie sandreed Vine-mesquite Stinkgrass Switchgrass Nuttall alkaligrass Canada wildrye Squirrel tail Alkali bluegrass Prairie cordgrass Alkali sacaton Sand dropseed Needle-and-thread Common reed Green needlegrass Redtop Yellow Indiangrass Introduced pasture grasses * Based on cattle. Where the primary use is for sheep, appropriate adjusCments in ratings can be made.