Results 181 to 190 of about 3,430 (205)

Inheritance of 2:1 Phyllosilicates in Costa Rican Andisols

Soil Science Society of America Journal, 1994
Abstract The occurrence of 2:1 phyllosilicates in Andisols is variously ascribed to in situ pedogenic origin, aeolian addition, or the presence of hydrothermally altered rock fragments. We studied the origin of 2:1 phyllosilicates that occur in Holocene Hapludands on andesitic, sandy beach ridges in Costa Rica by micromorphological ...
Jongmans, Ag, van Oort, Folkert, F., Nieuwenhuyse, A., Buurman, P., Jaunet, A.M., van Doesburg, J.D.J.   +5 more
openaire   +3 more sources

Electrokinetic determination of the buffer capacity of Andisols

Science of The Total Environment, 2007
Among methods which involve the flow of electric current, the electro-remediation techniques have shown useful both for the removal of polluting species, and for obtaining a series of parameters in relatively laboratory simple experiments which can be used to characterize soils.
Mario V, Vázquez, Felipe, Hernández-Luis, Dora, Benjumea, Domingo, Grandoso, Mercedes, Lemus, Carmen D, Arbelo   +5 more
openaire   +2 more sources

Relationship between stable carbon and nitrogen isotope ratios of humic acids extracted from Andisols and non-Andisols

CATENA, 2015
Abstract To relate the isotopic composition of soil humic acids (HAs) to their source plants and their degree of humification (as indicated by the degree of darkening), as well as to soil type, we determined the stable isotope ratios for carbon (δ13C) and nitrogen (δ15N) of HAs extracted from 26 virgin soil samples (14 Andisols and 12 non-Andisols ...
Naoya Katsumi, Koyo Yonebayashi, Nobuhide Fujitake, Masanori Okazaki   +3 more
openaire   +1 more source

Some Andisols from Savai'i, Western Samoa

Soil Science Society of America Journal, 1991
Abstract Five pedons in the lowlands and foothills of Savai'i were studied in detail to determine whether or not they were Andisols. All five met the requirements proposed by the International Committee for the Classification of Andisols (ICOMAND) for the designation of Andisols, as recently accepted into the soil taxonomy.
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Separation of melanic and fulvic andisols

Soil Science and Plant Nutrition, 1988
Abstract It has been recognized in Japan and Alaska that vegetational effects in particular, of grass and forest ecosystems contribute significantly to the formation of melanic and fulvic Andisols, respectively (SHOJI et al. 1988a, b). Although the two Andisols have thick, humus-rich horizons, they indicate remarkable differences in the humus ...
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Andisols from Four Different Regions of Iceland

Soil Science Society of America Journal, 1995
Abstract Limited information has been published on Andisols in Iceland, but such data are important for understanding the erosional and periglacial processes that are intense in Iceland. The objectives of this research were to investigate Andisols that developed in tephra and eolian materials and that are highly ...
Olafur Arnalds, C. T. Hallmark, L. P. Wilding   +2 more
openaire   +1 more source

Reliability of Andisol Field Texture Clay Estimates

Soil Survey Horizons, 1999
Particle‐size analyses are commonly run to standardize the description of field textures of most kinds of soils. Andisols are an exception, because they do not disperse completely. Failure to disperse completely, and the smeary feel of Andisols in contrast to the sticky feel of most other kinds of soils, cause some to question the ...
W.D. Nettleton, S.H. Brownfield, R. Burt, E.C. Benham, S.L. Baird, K. Hipple, C.L. McGrath, H. R. Sinclair   +7 more
openaire   +1 more source

Macropores regulate CO2 behavior in an andisol soil

Paddy and Water Environment, 2018
Macropores resulting from soil pedogenesis, biological activity, and agricultural practices play important roles in soil water, chemical and gas transport; however, seldom studies focus on the effect of soil macropores on CO2 behavior. In this study, a 150-day soil column incubation experiment was conducted to investigate the CO2 behavior in a ...
Linlin Guo, Taku Nishimura, Hiromi Imoto, Zhigang Sun   +3 more
openaire   +1 more source

Predictive Models for Selected Chemical Properties of Andisols

Soil Survey Horizons, 2001
Particle size and chemical properties are important in interpretations for many soils. In this study, statistical models developed from field textures, or apparent textures, and simple chemical tests predict the commonly measured chemical properties of Andisols.
W. D. Nettleton, S. H. Brownfield, E. C. Benham, R. Burt, K. Hipple, C. L. McGrath, H. R. Sinclair   +6 more
openaire   +1 more source

Andisols

2022
Thor Thorson, Chad McGrath, Dean Moberg, Matthew Fillmore, Steven Campbell, Duane Lammers, James G. Bockheim   +6 more
openaire   +1 more source