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12/9/2019 ESD Printable Report <br /> USFS Classification Hierarchy: <br /> National Hierarchical Framework of Ecological Units(Cleland et al,181-200): <br /> Domain>Division>Province>Section>Subsection>Landtype Association>Landtype>Landtype Phase. <br /> Supporting Information <br /> Associated Sites <br /> Site name Site ID Site narrative <br /> Loamy Plains,LRU's A&B R069XY006C0 The Loamy Plains occurs in a similar landscape position. <br /> Saline Overflow R069XY037C0 Saline Overflow is a run-in landscape position. <br /> Shaly Plains R069XY046CO Shaly Plains is shallow to moderately deep,less productive,with a <br /> component of Bigelow sage. <br /> Alkaline Plains LRU's A&B R069XY047C0 The Alkaline Plains occurs in a similar landscape position. <br /> Similar Sites <br /> Site name Site ID Site narrative <br /> Loamy Plains,LRU's A&B R069XY006CO The surface texture of the Loamy Plains site includes loam,silt loam,and <br /> clay loam.It exhibits a lower production of cool-season grasses. <br /> Alkaline Plains R069XY047CO The soils of the Alkaline Plains site contain salts.Salt tolerant species such <br /> as alkali sacaton are present. <br /> State Correlation <br /> This site has been correlated with the following states:co <br /> Inventory Data References <br /> *NRI-references to Natural Resource Inventory data <br /> Information presented here has been derived from data collection on private and federal lands using: <br /> •Double Sampling(clipped 2 of 5 plots)* <br /> •Rangeland Health** <br /> •Soil Stability** <br /> •Line Point Intercept:Foliar canopy,basal cover(Forb,Graminoid,Shrub,subshrub,Lichen,Moss,Rock fragments,bare ground,% <br /> Litter)*** <br /> •Soil pedon descriptions collected on site**** <br /> *NRCS double-sampling method,CO NRCS Similarity Index Worksheet 528(1). <br /> **Interpreting Indicators of Rangeland Health,Version 4,2005 <br /> ***Monitoring Manual for Grassland,Shrubland and Savanna Ecosystems,Volume 11,2005 <br /> ****Field Book for Describing and Sampling Soils,Version 3,2012 <br /> Additional reconnaissance data collection using numerous ocular estimates and other inventory data; NRCS clipping data for USDA <br /> program support;Field observations from experienced range trained personnel.Specific data information is contained in individual <br /> landowner/user case files and other files located in county NRCS field offices. <br /> Other Inventory Data References <br /> Data source Number of records Sample period State County. <br /> NRI 1 2011 Colorado Las Animas <br /> Hierarchical Classification Relationships <br /> MLRA 69 is in the Piedmont and Raton Sections of the Great Plains Province.The MLRA is further defined by Land Resource Units(LRUs) <br /> A,B,and C.The modal concepts of each LRU can be defined by soil properties and annual precipitation zones(PZ).Other features such as <br /> climate,geology,landforms and key vegetation further refine these concepts,and are described in the Ecological Site Description(ESD). <br /> LRU A(10-12 inches PZ)is the central portion of MLRA 69,extent is 2.4 million acres.There is irrigated cropland in the Arkansas Valley. <br /> Precipitation is too limited for dryland crops.Most of LRU A is rangeland,and includes the Comanche National Grassland(FS).This LRU is <br /> found in portions of Bent,Crowley,Otero and Pueblo counties.Soil Moisture Regime is Ustic Aridic.The Mean Annual Air Temperature <br /> (MAAT)is 51-54°F. <br /> LRU B(12-14 inches PZ)is 4.7 million acres and includes portions of Baca,Bent,Crowley,El Paso,Fremont,Kiowa,Las Animas,Lincoln, <br /> Prowers,and Pueblo counties.Most of the LRU is in rangeland.Land uses include irrigated and dry cropland,small acreage and urban <br /> ownership.Land east of 1-25 remains largely agricultural.Canyonlands are in the southern half and include Pinon Canyon Maneuver Site <br /> and the Picket Wire Canyon of the Comanche NG.Soil moisture regime is Ustic Aridic and the MAAT is 50-54*F. <br /> The Clayey Plains,LRUs A&B,site was developed from an earlier version of the Clayey ESD(2004,re-named Clayey Plains in 2007).This <br /> earlier version of the Clayey ESD(2004)was based on input from NRCS(formerly Soil Conservation Service)and historical information <br /> obtained from the Clayey ESD(new in 2004).This ESD meets the Provisional requirements of the National Ecological Site Handbook <br /> (NESH).This ESD will continue refinement towards an Approved status according to the NESH. <br /> Other References <br /> Data collection for this ecological site was done in conjunction with the progressive soil surveys within the Upper Arkansas Valley(MLRA 69) <br /> https://esis.sc.egov.usda.gov/ESDReport/fsReportPrt.aspx?id=R069XY042CO&rptLevel=all&approved=yes&repType=regular&scrns=&comm= 12/16 <br />