Genesis of placic horizons in Andisols from Terceira Island Azores—Portugal

Pinheiro, J.; Salguero, Marisa Tejedor; Rodrı́guez, Antonio Rodrı́guez

doi:10.1016/j.catena.2003.10.005

Cited by 24 publications

(24 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Climate appears to play a major role in that placic horizons are observed in soils with extremely high precipitation, ranging from 2400 to 3900 mm yr~ and averaging 3200 mm (Lavkulich et al, 1971;Valentine, 1969;Shoji et al, 1988;Ping et al, 1989;Hseu et al, 1999;Pinheiro et al, 2004;Wu and Chen, 2005;Schawe et al, 2007). This is the same as the 3200 mm yr~ recorded for the seven soils with placic horizons in the USA (Table 4).…”

Section: Placic Horizonssupporting

confidence: 49%

“…In Europe placic horizons occurred in areas where the groundwater was <70 cm from the soil surface (Kaczorek et al, 2004). Soils with placic horizons occur in one of three predominant vegetation types; tropical montane forest (Pinheiro et al, 2004;Wu and Chen, 2005;Schawe et al, 2007), western conifers (Valentine, 1969;Shoji et al, 1988;Ping et al, 1989), or bog (Crampton, 1963Lavkulich et al, 1971;Lapen and Wang, 1999). Ofthe seven soil series with a placic horizon examined in this study, three support western conifers and four feature tropical montane forest (data not shown).…”

Section: Placic Horizonsmentioning

confidence: 88%

“…This is the same as the 3200 mm yr~ recorded for the seven soils with placic horizons in the USA (Table 4). Soils with a placic horizon generally occur in depressions on the landscape and have a seasonally high water table (Crampton, 1963;Lapen and Wang, 1999;Pinheiro et al, 2004;Wu and Chen, 2005). In the present study, five of the seven soil series with a placic horizon have an aquic soil moisture regime (Table 3).…”

Section: Placic Horizonsmentioning

confidence: 93%

See 2 more Smart Citations

Distribution and Genesis of Ortstein and Placic Horizons in Soils of the USA: A Review

Bockheim

2011

Soil Sci. Soc. Am. j.

View full text Add to dashboard Cite

Soils with ortstein cover 2.2 million ha in the USA, 87% of which occur in Michigan and Florida. Of the 650 soils in the National Soil Survey database ckssified as Spodosols. 47 contain sufficient ortstein to be cla.ssified in the ortstein rupture-resistance class; another 42 soils contain materials that are <50% cemented and, therefore, not officially recognized as ortstein. Well-developed ortstein averages 41 cm in thickness and is moderately cemented, dense (bulk density 1.60 g cm" ). massive, very firm to extremely firm, predominantly in sandy particle-size classes, and may contain living roots. Because soils with and without ortstein often occur on the same landforms, soils containing >5% ortstein (89 series) were compared with geographically associated and competing soil series (59) that lack ortstein. using analysis of variance. Soils with ortstein occur on lesser slopes {p = 0.001 ) and at lower elevations {p = 0.015) than soils without ortstein. The lower depth boundary and thickness of the spodic horizon wete significantly greater {p = 0.001 ) in soils with ortstein than in those without ortstein. The data suggest that soil water transporting cementing materials (Fe, Al, Si, and dissolved organic C) moves more slowly in landscape positions where ortstein eventually forms than in those whete it is absent. However, ortstein is not restricted to soils with poor drainage as only 39% of the soils with ortstein have an aquic soil moisture regime. From a weight-of-evidence assessment, ortstein is cemented by Al-organic complexes and short-range-ordet compounds, and placic horizons ate cemented by Fe as ferrihydrite or as Fe-organic complexes.

show abstract

Section: Placic Horizonssupporting

confidence: 49%

Section: Placic Horizonsmentioning

confidence: 88%

Section: Placic Horizonsmentioning

confidence: 93%

See 1 more Smart Citation

Distribution and Genesis of Ortstein and Placic Horizons in Soils of the USA: A Review

Bockheim

2011

Soil Sci. Soc. Am. j.

View full text Add to dashboard Cite

show abstract

“…Otros investigadores como Pinheiro et al (2004) y Ferro et al (2014 encontraron en horizontes Bs valores de Feo que estuvieron entre 2.61 y 10.5 % y también los explicaron por la presencia de óxidos e hidróxidos de Fe no cristalinos en la matriz del suelo.…”

Section: Extracción Con Oxalato áCido De Amoniounclassified

Extracciones selectivas y secuenciales de Al, Fe y Si en un Andisol del Oriente antioqueño, Colombia

et al. 2018

View full text Add to dashboard Cite

Se estudió la extracción selectiva y secuencial de las fracciones de Al, Fe y Si (cloruro de potasio, pirofosfato de sodio, oxalato ácido de amonio, ditionito-citrato-bicarbonato e hidróxido de sodio) de un Andisol del Oriente antioqueño con fines genéticos, lo cual, permitió separar horizontes alofánicos y no alofánicos. En los horizontes A y 2B/A la fracción coloidal estuvo dominada por complejos organometálicos, mientras que en los horizontes 3C/A y 4Bs predominaron los aluminosilicatos y los óxidos e hidróxidos no cristalinos. Este método también logró diferenciar dentro del horizonte A, por lo menos, dos subhorizontes no visualizados en campo. Los bajos contenidos de Ald, Fed y Sid y de Aln y Fen reportados pueden deberse a las extracciones previas realizadas con pirofosfato de sodio y oxalato ácido de amonio, en las que se liberó la mayor proporción del Al, Fe y Si y a las bajas cantidades de coloides inorgánicos cristalinos que presentan los Andisoles.

show abstract

“…Soils of the Azores Archipelago have been studied in detail, and their characteristics and classification have been discussed in several papers (Auxtero et al, 2004;Pinheiro et al, 2001Pinheiro et al, , 2004Madeira, 1980;Madeira et al, 2002Madeira et al, , 2003Pinheiro, 1990Pinheiro, , 1999Madruga, 1995;Medina and Grilo, 1981;Ricardo et al, 1977).…”

Section: Soilsmentioning

confidence: 99%

Analysis and definition of potential new areas for viticulture in the Azores (Portugal)

Madruga

Azevedo

Sampaio

et al. 2015

SOIL

Self Cite

View full text Add to dashboard Cite

Abstract. Vineyards in the Azores have been traditionally settled on lava field terroirs but the practical limitations of mechanization and high demand on man labor imposed by the typical micro parcel structure of these vineyards contradict the sustainability of these areas for wine production, except under government policies of heavy financial support. Besides the traditional vineyards there are significant areas in some of the islands whose soils, climate and physiographic characteristics suggest a potential for wine production that deserves to be the object of an assessment, with a view to the development of new vineyard areas offering conditions for better management and sustainability.The landscape zoning approach for the present study was based in a geographic information system (GIS) analysis incorporating factors related to climate, topography and soils. Three thermal intervals referred to climate maturity groups were defined and combined with a single slope interval of 0-15 % to exclude the landscape units above this limit. Over this resulting composite grid, the soils were then selectively cartographed through the exclusion of the soil units not fulfilling the suitability criteria.The results show that the thermal interval of warmer conditions, well represented in the traditional terroir of Pico island, has practically no expression in the other islands. However, for the intermediate and the cooler classes, we could map areas of 5611 and 18 115 ha respectively, fulfilling the defined soils and slope criteria, indicating thus the existence of some landscapes in the studied islands revealing adequate potential for future development of viticulture, although certainly demanding a good judgment on the better grape varieties to be adapted to those climatic conditions.

show abstract

Genesis of placic horizons in Andisols from Terceira Island Azores—Portugal

Cited by 24 publications

References 10 publications

Distribution and Genesis of Ortstein and Placic Horizons in Soils of the USA: A Review

Distribution and Genesis of Ortstein and Placic Horizons in Soils of the USA: A Review

Extracciones selectivas y secuenciales de Al, Fe y Si en un Andisol del Oriente antioqueño, Colombia

Analysis and definition of potential new areas for viticulture in the Azores (Portugal)

Contact Info

Product

Resources

About