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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
341

Soils of Arizona

Buol, S. W. 02 1900 (has links)
No description available.
342

The effect of ions on the swelling of clays

Rowell, David L. January 1962 (has links)
No description available.
343

Transformations of sulfur in wetland rice soils

Islam, M. Mujibul 26 June 1992 (has links)
Graduation date: 1993
344

Tensile strength, shear strength, and effective stress for unsaturated sand

Baltodano-Goulding, Rafael. January 2006 (has links)
Thesis (Ph.D.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (February) Vita. Includes bibliographical references.
345

Soils of the Oregon coastal fog belt in relation to the proposed "Andisol" order

Badayos, Rodrigo Briones 20 August 1982 (has links)
A study was conducted to evaluate the properties of soils in the fog belt area of the Oregon Coast Range. Soils in the study were chosen to include only those belonging to Andepts or to andic subgroups. Samples were collected from eleven sites that were formed mostly from colluvial deposits of basaltic rocks, sedimentary rocks, and alluvium derived from volcanic and sedimentary rocks. The soils studied were characterized chemically and physically, and the mineralogy of the very fine sand and clay size fractions was determined. The eleven soils were classified on the assumption that Andisol is added in the Soil Taxonomy as the 11th order. Based on the low degree of profile differentiation shown by profile morphology, it was concluded that all of the soils studied are in an early stage of development. The soil structure is mostly granular in the surface and fine subangular blocky in the subsoil. Field texture and laboratory analyses indicate low percentage clay compared to silt throughout the profiles. Surface layers are mostly dark colored. All the soils have low bulk density, high water holding capacity at high suction (15 bar), high CEC, high organic carbon, high pH in NaF, high variable charge, and high phosphorus retention -all of which indicate a high proportion of amorphous materials in the clay fraction. Based on the mineralogy of the very fine sand fraction and field site observations, it was concluded that basaltic and volcaniclastic rocks were the major sources of the parent materials that have weathered to produce a dominance of amorphous materials in the soils studied. Chloritic intergrade dominates the crystalline clay size components of all the soils with minor amounts of smectite, mica, gibbsite, chlorite, halloysite, and kaolinite. It was concluded that three out of the eleven soils studied, have chemical characteristics of spodic horizons based on the amount of extractable Fe and Al measured, These soils were classified as Troporthods. Eight of the eleven soils were provisionally classified as Andisols. Seven of the eight Andisols were placed in the subgroup Typic Haplotropands and one under the subgroup Typic Haploborand. / Graduation date: 1983
346

Studies on volume change movements in high PI clays for better design of low volume pavements

Manosuthikij, Thammanoon. January 2008 (has links)
Thesis (Ph.D.) -- University of Texas at Arlington, 2008.
347

Analysis of pile loading tests in Hong Kong.

Tsui, Kam-kwong. January 1968 (has links)
Thesis (M. Sc.(Eng.))--University of Hong Kong, 1968. / Mimeographed.
348

ZINC ADSORPTION AND DESORPTION IN CALCAREOUS SOILS

Udo, Eno Jumbo, 1937- January 1968 (has links)
No description available.
349

Mineralogical characterization of vertisols of the Sudan Gezira

Mohamed ElTom, Osman Abdel Rahman, 1940- January 1970 (has links)
No description available.
350

Phosphorus fractions in some Arizona soils

Rauschkolb, Roy S. January 1963 (has links)
No description available.

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