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11/1 or 1999 10:32 71987505^^<5 USDA TDaD PEE 13 <br />• • <br />'' USDA, Soil Conservation Service <br />Section II-~ <br />_ UNITED STAi~S DEFAAT~fE~`T OF AGRICULTGRE <br />~~~ SOIL COPISERVAIION SERVICE <br />%l2~.v.o~s.a , COLORADO FI1:LD OFFICE <br />Loamy Plains i15 <br />ECG Site Description <br />MLRA b9A 6 698 <br />June 1997 <br />A. PF~SICAL CHARACTGRT_STICS <br />1. Physiographic Features <br />This site is on le•~eI to gently roiling uplands wick an oceeeionsl <br />slope up to l0?. 6levacic.is range from 3,350 to 6,SD0 `set (1,020 <br />to '_.980 meters). Th'_s site occurs on all exposures. <br />2. Climatic Features <br />a. The climate is Beni-arid with precipitation a+~eragir.g i0 tc 13 <br />inches (25 to 33 centimeters). Total yearly enowfal; is 12 to <br />44 inches (30 to 112 centimeters). The average monthly <br />precipitation ie as follows: <br />Jan Fab March April May June July Aug Sept Oct Vov Dec <br />.3 .3 .6 1.2 l.b 1.~ 1.9 1.6 .9 .7 .5 :3 <br />b. The mesn growing season averages approximately 15G to 175 days <br />from April 25 to October 10, and, in average ;rears, there is <br />su!!icisnt moisture at the beginning of the a owing season to <br />i1i[iate growth in such cool-season grasses as western <br />wheatgrass and needleandt4read. Their opei,suu growth is early <br />April [hrough July. The warm season grasses have choir optimum <br />growing season through June and August, if adequate moisture is <br />available. About 7S percent cf the 11 inches (28 cm) of annual <br />precipitation fails in the form of rain during the frost-Free <br />season, About ,5 percent of the annual precipitation belefita <br />cool-seasc~ clar.ts, 70 uercett benefits warm season plants and <br />the test fella during the season of plant dormancy. There are <br />27 days per year that the precipitation equals or exceeds .1 <br />inches (.04 cml, b days that meets, equals or exceeds .5 inches <br />(.20 cm), and 2 days that equal or exceed I.0 inches (2.54 cm). <br />c. The average annual temperature la 53° F (12° C) with 71 days <br />higher than 90° F (3T° C) and 155 days lower than 32' F (D° C). <br />uinrer low temperatures fall below the freezing mark much of the <br />time in December through February. Dates a! the last killing <br />frost map vary frnm April 24-30, and the first killing frost <br />from Uctcber S co Urtober 17. <br />t <br />