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11. Presence and thickness of compaction layer(usually none;describe soil profile features which may be mistaken for <br /> compaction on this site):None <br /> 12. Functional/Structural Groups(list in order of descending dominance by above-ground weight using symbols:>>,>,=to <br /> indicate much greater than,greater than,and equal to)with dominants and sub-dominants and'others"on separate lines: <br /> Dominant:warm season tall rhizomatous> <br /> Sub-dominant:warm season short bunchgrass=warm season tall bunchgrass>cool season grasses/grasslikes>shrubs>warm <br /> season mid bunchgrass> <br /> Other:leguminous(orbs>warm season(orbs>cool season(orbs <br /> Additional: <br /> 13. Amount of plant mortality and decadence(include which functional groups are expected to show mortality or decadence): <br /> Minimal <br /> 14. Average percent litter cover(35-60%)and depth(.25-.50inches):Litter cover during and following drought can range from 20-30% <br /> and 5-15%following wildfire. <br /> 15. Expected annual production(this is TOTAL above-ground production,not just forage production):800 lbs./ac.low precip years; <br /> 1650 lbs./ac.average precip years;2200 lbs./ac.high precip years.After extended drought or the first growing season following <br /> wildfire,production may be significantly reduced by 300—650 lbs./ac.or more. <br /> 16. Potential invasive(including noxious)species(native and non-native).List Species which BOTH characterize degraded states <br /> and have the potential to become a dominant or co-dominant species on the ecological site if their future establishment and <br /> growth is not actively controlled by management interventions.Species that become dominant for only one to several years <br /> (e.g.,short-term response to drought or wildfire)are not invasive plants.Note that unlike other indicator,we are describing <br /> what is NOT expected in the reference state for the ecological site:Invasive plants should not occur in reference plant community. <br /> Following fire or extended drought,cheatgrass,Russian thistle,kochia may invade assuming a seed source is available. <br /> 17. Perennial plant reproductive capability:The only limitations are weather-related,wildfire,natural disease,and insects that may <br /> temporarily reduce reproductive capability. <br /> Reference Sheet Approval <br /> Approval Date <br /> Herman B.Garcia,State Rangeland Management Specialist 12/5/2007 <br /> r Back to Top <br /> N RCS Home I USDA I Accessibility I FirstGov I Privacy Policy I Freedom of Information Act I Nondiscrimination Statement <br /> 18 of 18 <br />