Some Physical Changes Accompanying Prairie, Wiesenboden and Planosol Soil Profile Development from Peorian Loess in Southwestern Iowa

Ulrich, Rudolph

doi:10.2136/sssaj1950.036159950014000c0066x

Cited by 11 publications

(6 citation statements)

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“…In a study of the level soils in the same area, Ulrich (1949) found increasing horizon development along a similar traverse. This was indicated by ; increased formation, movement and accumulation of fine clay, increased clay content in the horizon of maximum accumulation, increased volume weight, de creased aeration and total porosity, and decreased permeability.…”

Section: B Properties Of the Monona Marshall And Sharpsburg Soils mentioning

confidence: 85%

Relative Erodibility of Three Loess‐Derived Soils in Southwestern Iowa

Schmidt¹,

Shrader²,

Moldenhauer

1964

Soil Science Soc of Amer J

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Measurements of original and present surface soil depth, as indicated by slope and erosion field data and organic carbon contents, were used to determine the relative erodibility of the loess‐derived Monona, Marshall, and Sharpsburg soils in southwestern Iowa. These studies indicated decreasing surface soil depths with increasing slope on all three soils, with the Monona soil having the least and Sharpsburg the most surface soil remaining. The difference in average depth to an arbitrary benchmark, 0.90% organic carbon content, in cultivated as compared with virgin profiles of each soil indicated, however, that slightly lower erosion losses due to cultivation over time have occurred on the Monona soil. Laboratory rainfall simulator studies indicated higher infiltration and lower soil loss rates on the Monona soil than on the Marshall and Sharpsburg soils. The formation of a dense surface seal by raindrop impact appeared to be a dominant factor in the erodibility of these soils. Studies on crusted samples indicated slightly lower soil loss and higher infiltration rates on the Monona even with the crust present.

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Section: B Properties Of the Monona Marshall And Sharpsburg Soils mentioning

confidence: 85%

Relative Erodibility of Three Loess‐Derived Soils in Southwestern Iowa

Schmidt¹,

Shrader²,

Moldenhauer

1964

Soil Science Soc of Amer J

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“…Peterson (1946) found between cation exchange capacity of the <1^ fractions and the indices of soil development. Ulrich (1950Ulrich ( , 1951 and Button (1951) concluded that decreasing loess thickness and increasing distance from Hallsworth (1963), Brown et al (1936) and Thorp e_t al. (1957) conducted laboratory experiments on simulated development of soils and clays.…”

Section: Clays and Clay Mineralsmentioning

confidence: 99%

Relation of Nonexchangeable Potassium and Magnesium to Development in Some Midwestern Soils

Kovar¹,

Riecken

1976

Soil Science Soc of Amer J

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The nonexchangeable (NEx) potassium and magnesium status of the <1µm clay and other properties of the thin loess over till soils of northwestern and eastern Iowa were investigated to better understand the genesis and morphology of these soils and to provide a firmer basis for classification of this recently delineated group of soils. These soils are compared with similar soils from Illinois and Ohio to evaluate the regional effects of parent materials, vegetation, and climate.The Sac and associated soils from northwestern Iowa have a higher NEx K and Mg content, are less texturally developed, release more K with sodium tetraphenylboron, and have a higher illite content than the Dinsdale and associated soils from eastern Iowa. These differences are attributed to the less weathered condition of the northwestern Iowa soils, primarily because of the lower mean annual precipitation (MAP) in that area. These differences support the separation of the two groups of soils at the series level.The loess‐derived upper sola of the forested Iowa soils have about the same NEx K and Mg contents, but more illite, and are less texturally developed than the upper loess portion of the forested Illinois and Ohio soil profiles. The lower‐till‐derived sola of the Iowa soils have a lower NEx K, NEx Mg, and illite content than the Illinois and Ohio soils. These differences in characteristics support the separation of the Iowa thin loess over till soils from the Illinois and Ohio thin loess over till soils at the series level.

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“…Jackson et al (1948) Ulrich (1950Ulrich ( , 1951 and Button (1951) concluded that decreasing loess thickness and increasing distance from loess source account for the increase in development of the soils studied. Physical changes accompanying soil development are: increas ing clay content in, and decreasing depth to, the maximum clay accumula tion horizon; increasing formation, movement and accumulation of fine (<0.06p,) clay; increasing volume weight; decreasing aeration and total porosity and decreasing permeability.…”

Section: Clays and Clay Mineralsmentioning

confidence: 93%

Relation of nonexchangeable potassium and magnesium to development in some Iowa soils

Kovar

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Some Physical Changes Accompanying Prairie, Wiesenboden and Planosol Soil Profile Development from Peorian Loess in Southwestern Iowa

Cited by 11 publications

References 0 publications

Relative Erodibility of Three Loess‐Derived Soils in Southwestern Iowa

Relative Erodibility of Three Loess‐Derived Soils in Southwestern Iowa

Relation of Nonexchangeable Potassium and Magnesium to Development in Some Midwestern Soils

Relation of nonexchangeable potassium and magnesium to development in some Iowa soils

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