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~, <br />• Rl1VOLA VERY FINE SANDY~LOAM, 0 to 2 percent slopes, Class I Land (Rf} <br />This soil occurs either along washes or arroyas extending from the <br />north or on broad coalescing alluvial fans. The alluvial material <br />from which the soil has developed was derived from sandstone and shale <br />and ranges from 4 to 20 feet deep. <br />This soil is much li'.ce Ravola fine sandy loam, 0 to 2 percent slopes, <br />but is generally core uniformly level. The texture is prevailingly <br />very fine sandy loam, but the percentage of silt is noticeably <br />higher in some places. A few small areas that have a loam texture <br />are included. <br />The 10- or 12-inch surface layer consists of light brow!zish-gray <br />' to very pale-broim very £ine sandy loam. In some places the under- <br />• lying thin depositional layers vary only slightly in color or texture. <br />In other places, especially near drainage courses, the layers are <br />moe ,arir_ble and may grade to loam, silt loam, or fine sandy loam. <br />r(.evertheless, ~ yers of very fine sandy loam are more numerous. Below <br />depths of 4 to 5 feet, the texture is sandier, and at depths of 8 <br />to 12 feet strata of loamy fine sand, gravel, and scattered sandstone <br />rock are common. <br />Disseminated lime occurs £rom the surface downward. Awing to the <br />friable consistence of the successive layers, the tilth, internal <br />drainage, available supply of moisture for plants, permeability to <br />pant roots, and other physical properties are favorable and assure <br />a wide suitability range for crops. The organic-:aatter content, <br />however, is low. The soil is slightly saline under native cover and <br />h~.; a fear strongly saline spots. Occasionally the crater table is high. <br />i1o severe limitations exist for this soil type. <br />• This soil type is considered to be within the Prime Agricultural Lands <br />definition, <br />