Agricultural Geology
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In our eReader you can find the full English version of the book. Read Agricultural Geology Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Agricultural Geology
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81. These fine par- ticles of feldspar and mica are of great value in supplying potash and lime to the soils.
Notable Regions. — While granites have wide surface exposures in North America, the areas in the Rocky Mountain region are, for the most part, hilly and not of much agri- cultural value. However, the rolling Piedmont in the eastern part of the United States includes large areas of productive soils derived from granites and gneisses. Two great soil series here are largely derived from gr...anites, the Cecil series in the southern Piedmont and the Chester in the northern Piedmont. These soils are characterized by red, heavy subsoils with angular quartz grains scattered through soil and subsoil and mica is common in the sub- soils. The Durham series is siliceous and is derived from acid granites.
'J. K. Plummer, Journal of Agricultural Research, Vol. 5, Part 1, 1915-16, pages 569-581.
Fig. 81. — Microphotograph of the soil from igneous rocks containing biotite mica. Most of the dark minerals are biotite.
What to read after Agricultural Geology?
You can find similar books in the "Read Also" column, or choose other free books by Frederick V Frederick Valentine Emerson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
81. These fine par- ticles of feldspar and mica are of great value in supplying potash and lime to the soils.
Notable Regions. — While granites have wide surface exposures in North America, the areas in the Rocky Mountain region are, for the most part, hilly and not of much agri- cultural value. However, the rolling Piedmont in the eastern part of the United States includes large areas of productive soils derived from granites and gneisses. Two great soil series here are largely derived from gr...anites, the Cecil series in the southern Piedmont and the Chester in the northern Piedmont. These soils are characterized by red, heavy subsoils with angular quartz grains scattered through soil and subsoil and mica is common in the sub- soils. The Durham series is siliceous and is derived from acid granites.
'J. K. Plummer, Journal of Agricultural Research, Vol. 5, Part 1, 1915-16, pages 569-581.
Fig. 81. — Microphotograph of the soil from igneous rocks containing biotite mica. Most of the dark minerals are biotite.
What to read after Agricultural Geology?
You can find similar books in the "Read Also" column, or choose other free books by Frederick V Frederick Valentine Emerson to read onlineMoreLess
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