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Articles 31 - 33 of 33
Full-Text Articles in Physical Sciences and Mathematics
Did Combine Traffic On Wet Soils Damage Fields Last Fall?, Lloyd W. Murdock
Did Combine Traffic On Wet Soils Damage Fields Last Fall?, Lloyd W. Murdock
Soil Science News and Views
Fields rutted by wheel tracks during harvest last fall are a common sight in the grain producing areas of Kentucky. And, foremost on many producer's minds now, is whether this damage will lower productivity from those fields during 1985 and beyond. This concern also exists among some leading agronomists in the United States who think that the amount of soil compaction due to machinery traffic is increasing. One of the reasons cited for this is the use of larger and heavier equipment. One such piece of equipment which has increased in size and weight is the combine. A combine with …
Mineralogy Of Kentucky Soils, Anastasios D. Karathanasis
Mineralogy Of Kentucky Soils, Anastasios D. Karathanasis
Soil Science News and Views
Very few mineralogical data have been published for soils in Kentucky. As an initial attempt to classify mineralogy of the subsoil, a general mineralogy map of the state was constructed based on currently available information (Fig. 1). The map suggests that quartz, mica, and feldspars are the dominant minerals of the sqnd and silt size fractions and that illite, smectite, kaolinite and hydroxyinterlayered vermiculite or smectite dominate the clay size soil fraction. Soils of the Western Coalfields, Eastern Coalfields, and Eastern Pennyrile regions generally contain more quartz in the sand and silt fraction than soils of the Purchase, Western Pennyrile, …
Depositional Environments And Petrology Of The Felix Coal Interval (Eocene), Powder River Basin, Wyoming, Peter D. Warwick
Depositional Environments And Petrology Of The Felix Coal Interval (Eocene), Powder River Basin, Wyoming, Peter D. Warwick
Theses and Dissertations--Earth and Environmental Sciences
A study of a 250 ft. (76.2 m) stratigraphic interval that includes the Eocene-age Felix coal of the Wasatch Formation was undertaken in the Powder River Basin of Wyoming to establish a depositional model based on the interrelations of coal-seam geometry, coal maceral composition, and spatial distribution of adjoining rocks. Regional cross sections and maps of major rock bodies were prepared from 147 measured stratigraphic sections and 56 geophysical logs. Trends in maceral and chemical properties within the Felix coal were identified from petrographic and geochemical analyses of 72 coal channel samples. The combined data sets indicate that the thickest …