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<br />r Ex N~eir A <br />~~~ <br />.~r;r <br />~:. <br />"' . 1/76 <br />! ~!~, J7 B - GraYPOln~=ve1~ loam, 0 to~~,crcent sin <br />.#g i - - <br />~` t' Thla 16 deep, well drained :;oil on broad alluvial fans and tc•rr,rcce <br />'f ~~' x,600 to 8,000 feet, It fonnrd Sn alluvial sediments derived <br />,sI! . <br />y ~ <br />' r principally from basalt, The average annual precipitation is about <br />! }~ <br />Ord-. 8 inches, the mean annual air temperature is about 41°F „ and frost- <br />~•:• free season !a about y5 days, Slopes are 0 to 3 percent, <br />P~~s:. <br />~• <br />,~ ';•~' Included In this unit are small areas of Derrick gravelly loam and <br />Y,. A <br />s <br />'+'fi, Platoro loam, both having slopes of 0 to 3 percent. <br />.~i.,.e . <br />.~.~ <br /><~ Typically the surface layer is gravelly loam about 4 inches thick, <br />;. <br />The subsoil la a clay loam Sn the upper p:u•t and travelly sandy clay <br />~"rj loam Sn the lower par and Ss about 9 inches thick. 'she suLstratum <br />;, <br />;; grades from a very gz'avPl]y sandy loam in the upper few Sr:chcs into <br />• sand, gavel, and cobble that extends to 60 inches or more, <br />X11•, Permeability is moderate. Effective rooting depth is ]0 to ?0 arches, <br />4'. <br />'~'~ Available water capacity is lox, Surface runoff Ss slox and erosion <br />~'. <br />hazard is slight, <br />~~"9 <br />;r , , <br />~- <br />'••,y ; <br />~'~+.,' Thia soil la used as native range and for irrigated cropland, ~~asture, <br />i~ , <br />N.: .. and hayland, Orops grown are alfalfa, potatoes, and small Q'a'.ns. <br />:, <br />Application of commercial fertilizers is necessary 1n addition to manure <br />~~k and plant residues. Irrigation methods suitable for this soil are <br />~" <br />1 r. <br />~~ <br />1 " !~ r <br />L `w <br />IK'~ , <br />-. . <br />., <br /> <br />i ~ <br />