Congressional Edition Volume 5167
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...paragraph, from which the fine soil has been removed by washing when cultivated. The second type embraces yellow-shale clay and its loamy phases. It is the residual product from the weathering of the argillaceous and moderately sandy shales, where there has been but little soil transportation. On broad flats near the heads of streams and where the valley hills have been eroded nearly to stream level, soil has accumulated to the depth of several feet, but as the slope becomes steeper the soil rapidly becomes shallower and "slate" chips more abundant, a rapid transition taking place with increased slope into the "slate-soil" type. These soils do not hold grass well except at high elevations, and constant tillage rapidly changes their character and lessens their earning value, as the fine soil is eroded. Above 1,500 feet altitude and in cool situations along moist slopes sheltered in part from the heat of the sun, especially on the heavier and more calcareous shales of the, Rockwood formation, and some in the Romney formation, a permanent grazing sod can be maintained. In other situations the grass dies in a few years and a scant growth of pennyroyal and spring and early summer weeds takes its place. When the shale soils are on high slopes the characteristic topographic features are the small size of the hills and the number and depth of the fissures which indent them, the surface features being in strong contrast to the rolling summits and broad, flat slopes, even where steep, which mark the limestone. This broken surface of the shale hills is another drawback to general farming on them, making the fields small and their cultivation difficult, and causing some inequality in the maturing of the crops. A crop makes on the...
- 189 x 246 x 11mm | 358g
- 13 Sep 2013
- United States
- black & white illustrations