"Slick spots" in Nebraska
1939
Fitts, J.W. | Rhoades, H.F. | Lyons, E.S.
Mechanical analysis, carbonates, pH, exchange capacity, exchangeable calcium, exchangeable magnesium, exchangeable sodium and potassium, and percentage of saturation with sodium and potassium are reported for slick spots and normal soils from four fields in the North Platte and Platte valleys of Nebraska. The data may be summarized as follows: 1. There was no consistent difference found between the calcium carbonate content of the percentage of particles less than 0.005 mm of slick spots and normal soils. In the mechanical analysis procedure of Engle and Yoder most of the calcium carbonate was analyzed in the separate less than 0.005 mm. 2. The slick spots were consistently higher than the normal soils in percentage of saturation with sodium and potassium. The poor physical properties of the slick spots was attributed to the higher content of exchangeable sodium and potassium. 3. A close relationship is shown between the pH of the slick spots and normal soils and their respective percentages of exchangeable monovalent ions and calcium carbonate.
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