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Soil Physical Quality and Soybean Yield as Affected by Chiseling and Subsoiling of a No-Till Soil Rev. Bras. Ciênc. Solo
Lozano,Luis Alberto; Soracco,Carlos Germán; Villarreal,Rafael; Ressia,Juan M.; Sarli,Guillermo O.; Filgueira,Roberto Raúl.
ABSTRACT The concept of soil physical quality (SPQ) is currently under discussion, and an agreement about which soil physical properties should be included in the SPQ characterization has not been reached. The objectives of this study were to evaluate the ability of SPQ indicators based on static and dynamic soil properties to assess the effects of two loosening treatments (chisel plowing to 0.20 m [ChT] and subsoiling to 0.35 m [DL]) on a soil under NT and to compare the performance of static- and dynamic-based SPQ indicators to define soil proper soil conditions for soybean yield. Soil sampling and field determinations were carried out after crop harvest. Soil water retention curve was determined using a tension table, and field infiltration was measured...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Effective porosity; Water retention curve; Soil loosening; Pore connectivity index.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100510
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Stabilization of soil hydraulic properties under a long term no-till system Rev. Bras. Ciênc. Solo
Lozano,Luis Alberto; Germán Soracco,Carlos; Buda,Vicente S.; Sarli,Guillermo O.; Filgueira,Roberto Raúl.
The area under the no-tillage system (NT) has been increasing over the last few years. Some authors indicate that stabilization of soil physical properties is reached after some years under NT while other authors debate this. The objective of this study was to determine the effect of the last crop in the rotation sequence (1st year: maize, 2nd year: soybean, 3rd year: wheat/soybean) on soil pore configuration and hydraulic properties in two different soils (site 1: loam, site 2: sandy loam) from the Argentinean Pampas region under long-term NT treatments in order to determine if stabilization of soil physical properties is reached apart from a specific time in the crop sequence. In addition, we compared two procedures for evaluating water-conducting...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Infiltration; Crop rotation; Water-conducting porosity; No tillage; Texture.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400024
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Sedimentación de partículas con distribución de tamaño fractal AGRIAMBI
Filgueira,Roberto R.; Pachepsky,Yakov A.; Fournier,Lidia L.; García,Mirta G.; Sarli,Guillermo O..
Desde hace varios años, el modelo de fragmentación fractal ha atraido la atención de los investigadores, como un camino lógico para describir e interpretar distribuciones de partículas observadas. El análisis textural de un suelo ha mostrado ser muy importante, pues se utiliza para diagnosticar y predecir el funcionamiento y uso del mismo. Los métodos más populares para determinar la textura han sido los de sedimentación en agua utilizando el hidrómetro o la pipeta. Ambos tienen como objetivo encontrar la fracción de masa de partículas que se encuentran en suspensión a tiempos prefijados y relacionarla con los diámetros de las mismas. En este trabajo se ha desarrollado una nueva función potencial que relaciona la fracción de masa en suspensión con el...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Suelos; Textura; Fragmentación.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662006000200005
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