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U.S.Dept.of Agriculture.1965.Soil Survey Prowers County,Colorado.
<br /> U.S.Dept.of Agriculture.1986.Soil Survey of Washington County,Colorado.
<br /> U.S.Dept.of Agriculture.1982.Soil Survey of Weld County,Northern Part,Colorado.
<br /> U.S.Dept.of Agriculture.1980.Soil Survey of Weld County,Southern Part,Colorado.
<br /> Additional Literature:
<br /> Clark,J.,E.Grimm,J.Donovan,S.Fritz,D.Engrstom,and J.Almendinger.2002.Drought cycles and landscape responses to past Aridity
<br /> on prairies of the Northern Great Plains,USA.Ecology,83(3),595-601.
<br /> Collins,S.,and S.Barber.(1985).Effects of disturbance on diversity in mixed-grass prairie.Vegetatio,64,87-94.
<br /> Egan,Timothy.2006.The Worst Hard Time.Houghton Mifflin Harcourt Publishing Company:New York,NY.
<br /> Hart,R.and J.Hart.1997.Rangelands of the Great Plains before European Settlement.Rangelands,19(1),4-11.
<br /> Hart,R.2001.Plant biodiversity on shortgrass steppe after 55 years of zero,light,moderate,or heavy cattle grazing.Plant Ecology,155,
<br /> 111-118.
<br /> Heitschmidt,Rodney K.,J.W.Stuth,(edited by).1991.Grazing Management,an Ecological Perspective.Timberland Press,Portland,OR.
<br /> Jackson,D.1966.The Journals of Zebulon Montgomery Pike with letters&related documents.Univ.of Oklahoma Press,First edition:
<br /> Norman,OK.
<br /> Mack,Richard N.,and J.N.Thompson.1982.Evolution in Steppe with Few Large,Hooved Mammals.The American Naturalist. 119,No.6,
<br /> 757-773
<br /> Reyes-Fox,M.,Stelzer H.,Trlica M.J.,McMaster,G.S.,Andales,A.A.,LeCain,D.R.,and Morgan J.A.2014.Elevated CO2 further lengthens
<br /> growing season under warming conditions.Nature,April 23,2014 issue at http://www.nature.com/nature/journal/v510/n7504
<br /> /full/nature13207.html,accessed March,2017.
<br /> Stahl,David W.,E.R.Cook,M.K.Cleaveland,M.D.Therrell,D.M.Meko,H.D.Grissino-Mayer,E.Watson,and B.H.Luckman.Tree-ring data
<br /> document 16th century megadrought over North America.2000.Eos,81(12),121-125.
<br /> The Denver Posse of Westerners.1999.The Cherokee Trail:Bent's Old Fort to Fort Bridger.The Denver Posse of Westerners,Inc.Johnson
<br /> Printing:Boulder,CO
<br /> U.S.Dept.of Agriculture.2004.Vascular plant species of the Comanche National Grasslands in southeastern Colorado.US Forest Service.
<br /> Rocky Mountain Research Station.Fort Collins,CO.
<br /> Zelikova,Tamara Jane,D.M.Blumenthal,D.G.Williams,L.Souza,D.R.LeCain,J.Morgan.2014.Long-term Exposure to Elevated CO2
<br /> Enhances Plant Community Stability by Suppressing Dominant Plant Species in a Mixed-Grass Prairie.Ecology,2014 issue at
<br /> www.pnas.org/cgi/doi/l 0.1 073/pnas.1 414659111
<br /> Acknowledgments:
<br /> Project Staff:
<br /> Kimberly Diller,Ecological Site Specialist,NRCS MLRA,Pueblo SSO
<br /> Andy Steinert,MLRA 67B Soil Survey Leader,NRCS MLRA Fort Morgan SSO
<br /> Ben Berlinger,Rangeland Management Specialist,Ret.NRCS La Junta,CO
<br /> Program Support:
<br /> Rachel Murph,NRCS State Rangeland Management Specialist-QC,Denver,CO
<br /> David Kraft,NRCS MLRA Ecological Site Specialist-QA,Emporia,KS
<br /> Josh Saunders,Rangeland Management Specialist-QC,NRCS Fort Morgan,CO
<br /> Patty Knupp,Biologist,Area 3,NRCS Pueblo,CO
<br /> Noe Marymor,Biologist,Area 2,NRCS Greeley,CO
<br /> Richard Mullaney,Resource Conservationist,Ret.,NRCS,Akron,CO
<br /> Chad Remley,Regional Director,N.Great Plains Soil Survey,Salina,KS
<br /> B.J.Shoup,State Soil Scientist,Denver
<br /> Eugene Backhaus,State Resource Conservationist,Denver
<br /> Carla Green Adams,Editor,NRCS,Denver,CO
<br /> Partners/Contributors:
<br /> Rob Alexander,Agricultural Resources,Boulder Parks&Open Space,Boulder,CO
<br /> David Augustine,Research Ecologist,Agricultural Research Service,Fort Collins,CO
<br /> John Fusaro,Rangeland Management Specialist,NRCS,Fort Collins,CO
<br /> Jeff Goats,Resource Soil Scientist,NRCS,Pueblo,CO
<br /> Clark Harshbarger,Resource Soil Scientist,NRCS,Greeley,CO
<br /> Mike Moore,Soil Scientist,NRCS MLRA Fort Morgan SSO
<br /> Tom Nadgwick,Rangeland Management Specialist,NRCS,Akron CO
<br /> Dan Nosal,Rangeland Management Specialist,NRCS,Franktown,CO
<br /> Steve Olson,Botanist,USFS,Pueblo,CO
<br /> Randy Reichert,Rangeland Specialist,ret.,USFS,Nunn,CO
<br /> Don Schoderbeck,Range Specialist,CSU Extension,Sterling CO
<br /> Terri Schultz,The Nature Conservancy,Ft.Collins,CO
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