Influence of soil pattern on matter transport in and from terrestrial biogeosystems—A new concept for landscape pedology

Sommer, Michael

doi:10.1016/j.geoderma.2006.03.040

Cited by 60 publications

(40 citation statements)

References 82 publications

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“…The highest phosphorus contents were found in the area where recent agricultural activities had been conducted, while low phosphorus content existed on land that had not been in agricultural use over the past year (Figure 3). This was consistent with Sommer [60], who argued that soil heterogeneity is related to differences in parent material, climate, topography and management practices. Sinegani et al [61] also state that the variability of surface soil in agricultural areas is primarily due to agricultural practices, while the variation in subsoil horizons is governed by pedogenic processes.…”

Section: Chemical Analysissupporting

confidence: 89%

Impact of Potentially Contaminated River Water on Agricultural Irrigated Soils in an Equatorial Climate

et al. 2017

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Globally, it is estimated that 20 million hectares of arable land are irrigated with water that contains residual contributions from domestic liquids. This potentially poses risks to public health and ecosystems, especially due to heavy metals, which are considered dangerous because of their potential toxicity and persistence in the environment. The Villavicencio region (Colombia) is an equatorial area where rainfall (near 3000 mm/year) and temperature (average 25.6 • C) are high. Soil processes in tropical conditions are fast and react quickly to changing conditions. Soil properties from agricultural fields irrigated with river water polluted by a variety of sources were analysed and compared to non-irrigated control soils. In this study, no physico-chemical alterations were found that gave evidence of a change due to the constant use of river water that contained wastes. This fact may be associated with the climatic factors (temperature and precipitation), which contribute to fast degradation of organic matter and nutrient and contaminants (such as heavy metals) leaching, or to dilution of wastes by the river.

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Section: Chemical Analysissupporting

confidence: 89%

Impact of Potentially Contaminated River Water on Agricultural Irrigated Soils in an Equatorial Climate

et al. 2017

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“…Segundo Sommer (2006), essas relações favorecem uma melhor compreensão e entendimento dos solos na paisagem, por dois aspectos: (a) permitem vislumbrar a variabilidade espaço-temporal dos atributos do solo e (b) permitem visualizar os processos dinâmicos, por exemplo, transporte de água, solutos (orgânicos e inorgânicos) e sedimentos. Nesse sentido, Gobin et al (2001) afirmaram que o movimento da água nas paisagens é o principal responsável pelo processo de desenvolvimento do solo e, por isso, a compreensão das formas do relevo é o primeiro passo para fazer inferências e predições sobre os atributos do solo em diferentes feições da superfície da terra.…”

Section: Introductionunclassified

Relações solo-paisagem em uma topossequência sobre substrato granítico em Santo Antônio do Matupi, Manicoré (AM)

Campos

Ribeiro

Júnior

et al. 2011

Rev. Bras. Ciênc. Solo

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RESUMOConsiderando as dimensões da região amazônica e a necessidade de estudos que estabeleçam conexões entre os solos e a expressão da paisagem, o objetivo deste trabalho foi estudar as relações solo-paisagem em uma topossequência sobre substrato granítico em Santo Antônio do Matupi, Manicoré, AM. Foi estabelecido um caminhamento de 3.000 m a partir do "espigão" da vertente, no seu sentido mais suave, com identificação dos segmentos da vertente com base na "quebra" do declive do terreno. Foram abertas trincheiras nos segmentos de vertente mapeados, e perfis foram caracterizados morfologicamente, coletando-se amostras de seus horizontes. Foram realizadas análises físicas (textura, ADA e GF, Ds e Dp, Pt e CHSS), químicas (pH em água e KCl, Ca, Mg, K, Na e Al trocáveis, P disponível, H + Al e C orgânico; SiO 2 , Al 2 O 3 e Fe 2 O 3 (método do H 2 SO 4 ) e óxidos de Fe "livres" extraído com ditionito-citrato-bicarbonato e o Fe mal cristalizado extraído com oxalato de amônio) e mineralógicas (frações areia, silte e argila), usando difratometria de raios X. As variações do relevo favoreceram a presença de solos distróficos nos topos e solos eutróficos no sopé de transporte. As variáveis Δ Δ Δ Δ ΔpH, relação silte/argila, V % e relação Fed/Fet indicaram a presença de solos mais intemperizados nas áreas de topo da paisagem e solos com menor grau de evolução na encosta e no sopé de transporte. A composição mineralógica da fração argila

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“…The soil at all locations is affected by the mobilization and transport of solutes, colloids and sediments from the surrounding area. Transport processes are controlled by terrain and geology at the landscape scale, not at the field scale (Sommer 2006). Topography affects many of the properties that affect EC 25 .…”

Section: Introductionmentioning

confidence: 99%

Interpretation of electrical conductivity patterns by soil properties and geological maps for precision agriculture

et al. 2008

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Precision farming needs management rules to apply spatially differentiated treatments in agricultural fields. Digital soil mapping (DSM) tools, for example apparent soil electrical conductivity, corrected to 25°C (EC 25 ), and digital elevation models, try to explain the spatial variation in soil type, soil properties (e.g. clay content), site and crop that are determined by landscape characteristics such as terrain, geology and geomorphology. We examined the use of EC 25 maps to delineate management zones, and identified the main factors affecting the spatial pattern of EC 25 at the regional scale in a study area in eastern Germany. Data of different types were compared: EC 25 maps for 11 fields, soil properties measured in the laboratory, terrain attributes, geological maps and the description of 75 soil profiles. We identified the factors that influence EC 25 in the presence of spatial autocorrelation and field-specific random effects with spatial linear mixed-effects models. The variation in EC 25 could be explained to a large degree (R 2 of up to 61%). Primarily, soil organic matter and CaCO 3 , and secondarily clay and the presence of gleyic horizons were significantly related to EC 25 . Terrain attributes, however, had no significant effect on EC 25 . The geological map unit showed a significant relationship to EC 25 , and it was possible to determine the most important soil properties affecting EC 25 by interpreting the geological maps. Including information on geology in precision agriculture could improve understanding of EC 25 maps. The EC 25 maps of fields should not be assumed to represent a map of clay content to form a basis for deriving management zones because other factors appeared to have a more important effect on EC 25 .

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Influence of soil pattern on matter transport in and from terrestrial biogeosystems—A new concept for landscape pedology

Cited by 60 publications

References 82 publications

Impact of Potentially Contaminated River Water on Agricultural Irrigated Soils in an Equatorial Climate

Impact of Potentially Contaminated River Water on Agricultural Irrigated Soils in an Equatorial Climate

Relações solo-paisagem em uma topossequência sobre substrato granítico em Santo Antônio do Matupi, Manicoré (AM)

Interpretation of electrical conductivity patterns by soil properties and geological maps for precision agriculture

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