Fluorine Content of Soil from Morrow Plots Over a Period of 67 Years
1977
Omueti, J. A. I. | Jones, Robert L.
Between 1904 and 1971, F content in Morrow Plot soils varied from a mean of 275 to 381 mg/kg. The cause of variation in F content was shown to be related to phosphorus fertilization practices. Much of the F added to the soils in the form of rock phosphate between 1904 and 1924 was retained by 1955. Average loss of F from the soil per annum between 1924 and 1944 was calculated to be about 2.5-mg F/kg. Recent samplings contain large, unaccounted-for variability.
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