The natural supply of essential plant nutrients by a fertile soil is a complex process well demonstrated by the exacting requirements of hydroponics. How soil profiles of value in agriculture–-as well as mediocre ones–-arise from parent rocks is treated under the headings: weathering, translocation and the organic cycle, special reference being made to the formation of clay minerals with characteristic structures and properties.
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References
1.
AfanasievJ. N. (1927). The classification problem in Russian soil science. U.S.S.R. Acad. Sci. Russian Pedological Investigations, V.
2.
DicksonB. A., and CrockerR. L. (1953). J. Soil Sci., 4, 123.
3.
JennyH. (1941). Factors of soil formation. New York, McGraw-Hill.
4.
PerelmanA. I. (1955). C. R. Acad. Sci. U.R.S.S., 103, 669.
5.
PolynovB. B. (1937). The cycle of weathering. (Tr. A. Muir). London, Thos. Murby.
6.
WalkerT. W., and AdamsA. F. R. (1958). Soil Sci., 85, 307.
7.
WalkerT. W., and AdamsA. F. R. (1959). Soil Sci., 87, 1.
8.
WalkerT. W., ThapaB. K., and AdamsA. F. R. (1959). Soil Sci., 87, 135.
