Variabilidade espacial e temporal da resistência mecânica do solo à penetração em áreas com e sem manejo químico localizado

Mercante, Erivelto; Uribe-Opazo, Miguel Ángel; Souza, Eduardo Godoy de

doi:10.1590/s0100-06832003000600019

Cited by 34 publications

(42 citation statements)

References 1 publication

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“…All environments had moderate degrees of spatial dependence (Cambardella et al, 1994). These results are in agreement with results found by Mercante et al (2003) and Silva Cruz et al (2010).…”

Section: Resultssupporting

confidence: 91%

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: Resultssupporting

confidence: 91%

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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show abstract

“…The lowest value was obtained for texture (0 %) and the highest for PR 0.05 m (80 %). With exception of texture, with strong DD, and PR 0.05 m, with weak DD, the other properties had moderate DD, agreeing with various authors who also studied soil physical properties (Mercante et al, 2003;Silva et al, 2004;Grego & Vieira, 2005;Souza et al, 2006;Siqueira et al, 2008). Predominance of moderate spatial dependence and strong dependence indicate that absence of tilling does not necessarily affect the varibility of soil properties.…”

Section: Soil Physical Propertiessupporting

confidence: 88%

Spatial and temporal variability of crop yield and some Rhodic Hapludox properties under no-tillage

Filho¹,

Vieira

Chiba

et al. 2010

Rev. Bras. Ciênc. Solo

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SUMMARYSoil properties are closely related with crop production and spite of the measures implemented, spatial variation has been repeatedly observed and described. Identifying and describing spatial variations of soil properties and their effects on crop yield can be a powerful decision-making tool in specific land management systems. The objective of this research was to characterize the spatial and temporal variations in crop yield and chemical and physical properties of a Rhodic Hapludox soil under no-tillage. The studied area of 3.42 ha had been cultivated since 1985 under no-tillage crop rotation in summer and winter. Yield and soil property were sampled in a regular 10 x 10 m grid, with 302 sample points. Yields of several crops were analyzed (soybean, maize, triticale, hyacinth bean and castor bean) as well as soil chemical (pH, Soil Organic Matter (SOM), P, Ca 2+ , Mg 2+ , H + Al, B, Fe, Mn, Zn, CEC, sum of bases (SB), and base saturation (V %)) and soil physical properties (saturated hydraulic conductivity, texture, density, total porosity, and mechanical penetration resistance). Data were analyzed using geostatistical analysis procedures and maps based on interpolation by kriging. Great variation in crop yields was observed in the years evaluated. The yield values in the Northern region of the study area were high in some years. Crop yields and some physical and soil chemical properties were spatially correlated.Index terms: crop yield maps, geostatistics, kriging.(1) Part of the master dissertation of the primary author developed at the IAC Tropical and Sub-tropical Agriculture Graduate Program, Campinas (SP (pH, MOS, P, Ca, Mg, H + Al, B, Fe, Mn, Zn, CTC, SB e V %)

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“…Para a qualidade física, a resistência do solo à penetração é considerada a propriedade mais adequada para expressar o grau de compactação do solo e, consequentemente, a facilidade de penetração das raízes. Por isso, sua quantificação representa importante indicativo da dinâmica de crescimento e desenvolvimento do sistema radicular das plantas (Stolf et al, 1983;Tormena & Roloff, 1996;Pereira et al, 2002;Mercante et al, 2003).…”

Section: Introductionunclassified

Relação umidade versus resistência à penetração para um argissolo amarelo distrocoeso no recôncavo da Bahia

Silveira¹,

Filho

Sacramento³

et al. 2010

Rev. Bras. Ciênc. Solo

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Variabilidade espacial e temporal da resistência mecânica do solo à penetração em áreas com e sem manejo químico localizado

Abstract: RESUMO

Cited by 34 publications

References 1 publication

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

Spatial and temporal variability of crop yield and some Rhodic Hapludox properties under no-tillage

Relação umidade versus resistência à penetração para um argissolo amarelo distrocoeso no recôncavo da Bahia

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