24 
SOIL SURVEY OF JACKSON COUNTY 
Native vegetation.— The original timber growth consisted of 
the same trees as on the typical soil, oak predominating. Most 
of the standing timber outside the bottom lands is now found 
on this phase, and on the rough stony land with which it is 
associated, though a considerable proportion of the steep land 
is cleared, and is either in cultivation or pasture land. 
Present agricultural development. —The same crops are 
grown on the steep phase as on the typical soil, but less corn 
and other intertilled crops are grown and more of the land is 
in grass and pasture than on the main type. The ordinary 
yields of all crops are somewhat lower. Because of the steep 
character of the surface, the phase is more difficult to work 
than the typical soil. The steepest portions of the phase are 
now in timber or pasture land, and the remainder is devoted to 
general farming. 
LINTONIA SILT LOAM 
Extent and distribution. —This soil occupies part of the high¬ 
est levels of the terraces bordering the Black and Trempealeau 
Rivers. The soil quite closely resembles the Knox silt loam in 
texture and color, but differs from it in topography, origin, and 
the position which it occupies. 
Description. —The surface soil of the Lintonia silt loam to 
an average depth of ten inches consists of a brownish-gray, 
friable silt loam, which becomes lighter colored on drying and 
frequently has a whitish appearance. The quantity of organic 
matter present in the surface soil is comparatively small, and 
this accounts in part for the light color of the material. A 
slight acid condition has developed in places in the surface soil, 
as indicated by the litmus paper test. The subsoil consists of 
a yellowish-brown or buffcolored silt loam, which usually becomes 
somewhat heavier and more compact with depth, and at twenty- 
four to thirty inches may be a silty clay loam. Below this 
depth there is often a considerable quantity of fine and very 
fine sand, and this mixture extends to a depth of three feet or 
over, and grades into stratified fine sand with layers of gravel 
in the lower depths. 
Topography and drainage— The surface of the Lintonia silt 
loam is usually level or nearly so, frequently having a gentle 
slope toward the stream channels along which it occurs. The 
