Mineralogy of the clay fraction of alfisols in two slope curvatures: IV - spatial correlation with physical properties

Camargo, Lívia Arantes; Júnior, José Marques; Pereira, Gener Tadeu

doi:10.1590/s0100-06832013000200002

Cited by 8 publications

(7 citation statements)

References 39 publications

(50 reference statements)

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“…For this purpose, geostatistical techniques are used to study the spatial variability of soil and plant properties (Zanão Júnior et al, 2007;Marins et al, 2008;Vieira et al, 2011;Campos et al, 2012Campos et al, , 2013Camargo et al, 2013;Bottega et al, 2013). However, these techniques require a previous sample design with the exact spatial position of each sample point (Montanari et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Use of Scaled Semivariograms in the Planning Sample of Soil Physical Properties in Southern Amazonas, Brazil

Aquino¹,

Campos

Marques³

et al. 2015

Rev. Bras. Ciênc. Solo

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There is a great lack of information from soil surveys in the southern part of the State of Amazonas, Brazil. The use of tools such as geostatistics may improve environmental planning, use and management. In this study, we aimed to use scaled semivariograms in sample design of soil physical properties of some environments in Amazonas. We selected five areas located in the south of the state of Amazonas, Brazil, with varied soil uses, such as forest, archaeological dark earth (ADE), pasture, sugarcane cropping, and agroforestry. Regular mesh grids were set up in these areas with 64 sample points spaced at 10 m from each other. At these points, we determined the particle size composition, soil resistance to penetration, moisture, soil bulk density and particle density, macroporosity, microporosity, total porosity, and aggregate stability in water at a depth of 0.00-0.20 m. Descriptive and geostatistical analyses were performed. The sample density requirements were lower in the pasture area but higher in the forest. We concluded that managed-environments had differences in their soil physical properties compared to the natural forest; notably, the soil in the ADE environment is physically improved in relation to the others. The physical properties evaluated showed a structure of spatial dependence with a slight variability of the forest compared to the others. The use of the range parameter of the semivariogram analysis proved to be effective in determining an ideal sample density.

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Section: Introductionmentioning

confidence: 99%

Use of Scaled Semivariograms in the Planning Sample of Soil Physical Properties in Southern Amazonas, Brazil

Aquino¹,

Campos

Marques³

et al. 2015

Rev. Bras. Ciênc. Solo

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“…2). The soluble Si contents should also be associated with the type of soil and not just to the soil clay content because there are mineralogical differences among highly-weathered soils, such as Oxisols and Ultisols in the case of this study, mainly related to the quantity of oxides, oxi-hydroxides and silicated minerals in their surface horizons 51–55 , that probably result in available Si contents not simply explained by soil clay content 10 . A previous study using four types of soil (Typic Udorthent, Ultisol, Oxisol and Udox) demonstrated a negative correlation between the soil clay and soluble Si contents only in the Ultisol 29 , which agreed with the results of this study.…”

Section: Discussionmentioning

confidence: 83%

“…Qualitative and quantitative soil mineralogy, as well as weathering stage, SiO 2 contents and pH values, around both municipalities Guaíra and Ariranha, can be found in Alves and Lavorenti 51 , Soares et al . 52 , Alves and Omotoso 53 , and Camargo and Marques Júnior 54,55 . The soil minerals consist essentially of kaolinite, hematite, goethite, gibbsite and quartz.…”

Section: Methodsmentioning

confidence: 99%

Methods and extractants to evaluate silicon availability for sugarcane

Crusciol

Arruda

Fernandes

et al. 2018

Sci Rep

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The correct evaluation of silicon (Si) availability in different soil types is critical in defining the amount of Si to be supplied to crops. This study was carried out to evaluate two methods and five chemical Si extractants in clayey, sandy-loam, and sandy soils cultivated with sugarcane (Saccharum spp. hybrids). Soluble Si was extracted using two extraction methods (conventional and microwave oven) and five Si extractants (CaCl2, deionized water, KCl, Na-acetate buffer (pH 4.0), and acetic acid). No single method and/or extractant adequately estimated the Si availability in the soils. Conventional extraction with KCl was no more effective than other methods in evaluating Si availability; however, it had less variation in estimating soluble Si between soils with different textural classes. In the clayey and sandy soils, the Na-acetate buffer (pH 4.0) and acetic acid were effective in evaluating the Si availability in the soil regardless of the extraction methods. The extraction with acetic acid using the microwave oven, however, overestimated the Si availability. In the sandy-loam soil, extraction with deionized water using the microwave oven method was more effective in estimating the Si availability in the soil than the other extraction methods.

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“…The mineralogical composition of Brazilian Ultisols include varying proportions of iron oxides, gibbsite, and kaolinite, which in turn are related to the soil's physical attributes (Lu et al, 2014;Bonetti et al, 2017). Furthermore, Camargo et al (2013) and Ramos et al (2015) found high values of soil bulk density and penetration resistance in kaolinitic soils. Meanwhile, Manyala et al (2015) and Wu et al (2016) showed a correlation between BD and iron extracted by dithionitecitrate-bicarbonate (DCB) in Ultisols.…”

Section: Introductionmentioning

confidence: 99%

Effects of Clay Fraction Mineralogy on Physical Attributes of a Yellow Ultisol Treated With Chiseling

Nogueira¹,

Fernandes²,

Souza³

et al. 2020

Eng. Agríc.

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The objective of this study was to evaluate the influence of minerals in the clay fraction on physical attributes of Yellow Ultisol cultivated with sugarcane and prepared with two different treatments: chiseling across the entire area and chiseling only in planting rows. The samples were collected from four layers of soil at eight months after planting. We assessed the texture of the soil, levels of iron extracted by dithionite-citrate-bicarbonate (DCB) and ammonium acid oxalate (AAO), ratio of kaolinite/(kaolinite + gibbsite), soil bulk density, and soil penetration resistance. The first area showed a higher ratio of kaolinite/(kaolinite + gibbsite) and the second area had greater levels of iron extracted by DCB. Levels of iron extracted by DCB were inversely correlated with soil bulk density and penetration resistance, while the kaolinite/(kaolinite + gibbsite) ratio was directly correlated with soil bulk density and penetration resistance. The area with a greater kaolinite/(kaolinite + gibbsite) ratio had higher values of soil bulk density and soil penetration resistance and the area with higher levels of iron showed lower values of soil bulk density and soil penetration resistance. The mineralogy influenced the soil's physical attributes, while soil preparation treatments did not.

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Mineralogy of the clay fraction of alfisols in two slope curvatures: IV - spatial correlation with physical properties

Cited by 8 publications

References 39 publications

Use of Scaled Semivariograms in the Planning Sample of Soil Physical Properties in Southern Amazonas, Brazil

Use of Scaled Semivariograms in the Planning Sample of Soil Physical Properties in Southern Amazonas, Brazil

Methods and extractants to evaluate silicon availability for sugarcane

Effects of Clay Fraction Mineralogy on Physical Attributes of a Yellow Ultisol Treated With Chiseling

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