Characterization of soil structure and porosity under long-term conventional tillage and no-tillage systems

Filho, João Tavares; Tessier, D.

doi:10.1590/s0100-06832009000600032

Cited by 29 publications

(22 citation statements)

References 15 publications

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“…These results are in line with Neves et al (2003), Benito et al (2008), Domingos et al (2009) and Tavares Filho & Tessier (2009 and show the differences in soil structure of the two management systems. Conventional tillage of this area with a plow and one or two leveling disk harrows and no-tillage cultivation induced considerable changes in the soil structure between 0 and 0.5 m in comparison to the soil under native forest, with increasingly compacted structures and root growth predominantly in the cracks.…”

Section: Visual Assessment Of Soil Morphologysupporting

confidence: 84%

Soil aggregation under different management systems

Portella¹,

Guimarães

Feller

et al. 2012

Rev. Bras. Ciênc. Solo

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Section: Visual Assessment Of Soil Morphologysupporting

confidence: 84%

Soil aggregation under different management systems

Portella¹,

Guimarães

Feller

et al. 2012

Rev. Bras. Ciênc. Solo

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“…Tillage systems present great influence in the SPS and consequently in the PSD (Kay and VandenBygaart, 2002;Kravchenko et al, 2011;Peth et al, 2008;Schjønning and Rasmussen, 2000). Tavares Filho and Tessier (2009) observed important changes in the structure of a Brazilian Oxisol induced by conventional (CT) and no-tillage (NT) systems. The authors observed a disaggregated microaggregate structure between 0 and 20 cm for CT and the presence of fissures and biopores for NT.…”

Section: Introductionmentioning

confidence: 99%

Soil structure changes induced by tillage systems

Pires

Borges

Rosa³

et al. 2017

Soil and Tillage Research

216

104

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Structure represents one of the main soil physical attributes indicators. The soil porous system (SPS) is directly linked to the soil structure. Water retention, movement, root development, gas diffusion and the conditions for all soil biota are related to the SPS. Studies about the influence of tillage systems in the soil structure are important to evaluate their impact in the soil quality. This paper deals with a detailed analysis of changes in the soil structure induced by conventional (CT) and no-tillage (NT) systems. Three different soil depths were studied (0-10, 10-20 and 20-30 cm). Data of the soil water retention curve (SWRC), micromorphologic (impregnated blocks) (2D) and microtomographic (mCT) (3D) analyses were utilized to characterize the SPS. Such analyses enabled the investigation of porous system attributes such as: porosity, pore number and shape, pore size distribution, tortuosity and connectivity. Results from this study show a tri-modal pore size distribution (PSD) at depths 0-10 and 10-20 cm for the soil under CT and a bi-modal PSD for the lower layer (20-30 cm). Regarding the soil under NT, tri-modal PSDs were found at the three depths analyzed. Results based on the micromorphologic analysis (2D) showed that the greatest contribution to areal porosity (AP) is given by pores of round (R) shape for CT (52%: 0-10 cm; 50%: 10-20 cm; 67%: 20-30 cm). Contrary to the results observed for CT, the soil under NT system gave the greatest contribution to AP, for the upper (0-10 cm) and intermediate (10-20 cm) layers, due to the large complex (C) pore types. For the mCT analysis, several types of pores were identified for each soil tillage system. Small differences in the macroporosity (MAP) were observed for the 0-10 and 20-30 cm between CT and NT. A better pore connectivity was found for the 0-10 cm layer under NT. 2016 Elsevier B.V. All rights reserved.

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“…For the Ch 1 and CT treatments, the low void ratio is attributed to the disruption of soil matrix by soil disturbance with distort pore volume and continuity. Tavares Filho and Tessier () also found lower void ratio from CT treatment than NT system. According to Ribeiro et al.…”

Section: Resultsmentioning

confidence: 85%

Common bean in highly variable weather conditions, on sandy soils, and food security in a subtropical environment

Reichert

Rodrigues

Awe

et al. 2015

Food and Energy Security

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Common bean is a vital component of food security and reduction in malnutrition in developing nations of the world. In a year of low rainfall and high temperature during flowering and high rainfall during grain filling, we studied the effects of (1) water availability and tillage on soil structural formation and on water retention, growth and productivity of common bean, and (2) time series analysis of soil available water and its relationship with related atmospheric variables. Soil management systems consisted of no-tillage (NT), conventional tillage (CT), chiseling 2 days before sowing (Ch 0 ), and 1 year before sowing (Ch 1 ), in complete randomized block design and four replications. Air temperature, rainfall, soil available water, and air capacity were monitored throughout the 78-days bean cycle, and time series analysis of data was performed. Water availability in topsoil reached limiting values, close to the permanent wilting point, limiting proper development of bean at flowering. Water availability was higher in periods of limited rainfall in untilled soils (NT and Ch 1 ). Low soil availability of water and high air temperatures during flowering and grain filling stages affected grain production but grain yield did not differ statistically among tillage systems, which was similar to the average yield obtained in the state of Rio Grande do Sul. Temporal distribution of soil available water did not correlate with daily rainfall but correlated with air temperature. Time series analysis was adequate for estimating soil available water from its previous and related variables. Conservation agriculture (no-tillage and old-chiseling) improves water conditions in soil, but with long periods of water deficit there is no guarantee for high food production; thus, supplementary irrigation may still be necessary to reduce the combined effects of abiotic factors of air temperature and rainfall. 220

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Characterization of soil structure and porosity under long-term conventional tillage and no-tillage systems

Cited by 29 publications

References 15 publications

Soil aggregation under different management systems

Soil aggregation under different management systems

Soil structure changes induced by tillage systems

Common bean in highly variable weather conditions, on sandy soils, and food security in a subtropical environment

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