Tensile strength and friability of an Alfisol under agricultural management systems

Reis, Diony Alves; Lima, Cláudia Liane Rodrigues de; Pauletto, Eloy Antônio; Dupont, Patricia Bianca; Pillon, Clênio Nailto

doi:10.1590/s0103-90162014000200012

Cited by 7 publications

(16 citation statements)

References 15 publications

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“…More recently, aggregate tensile strength and friability have been pointed out as indicators of structural quality (Reis et al, 2014;Tang et al, 2015). The tensile strength is defined as the stress or strength per unit of area required to break aggregates when submitted to pressure being the most useful measure of individual resistance of soil aggregates consisting of an indicator sensitive to the structural soil condition that reflects the effects of natural factors, as well as land use and management.…”

Section: Introductionmentioning

confidence: 99%

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Lima

Paiva

Nunes

et al. 2018

Agraria

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Changes in the soil structural quality have caused alterations in root growth and agricultural yield. With the purpose of finding critical values of physical parameters and alternative, viable and suitable ways of minimize the soil degradation, this study aimed at quantifying aggregate tensile strength (TS), friability (F), bull density (Bd), total porosity (Tp), macroporosity (Ma), penetration resistance (PR) and total organic carbon (TOC). Relations were established to estimate the structural quality of some parameters of an Ultisol under different uses. The study was carried out on a farm, in the rural area of RS, inserted in the Arroio Moreira waterbasin, Brazil. Disturbed and undisturbed samples were collected from the 0.00 to 0.10 m layer. Regarding TS and soil use, 900 samples were selected, totalling 2700 aggregates. Undisturbed samples (135) were collected for the evaluation of Bd, porosity and PR. The TOC was quantified using 45 aggregates through the dry combustion method. All physical parameters with exception of F are important in monitoring the structural quality.The lowest values of TS, PR and Bd were verified in the soil under fallow, and the highest ones in the soil under pasture. An inverse relation between TS and TOC and between Bd and TOC was verified. Critical values of Bd and TS to crop development might be estimated from the PR.

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Section: Introductionmentioning

confidence: 99%

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Lima

Paiva

Nunes

et al. 2018

Agraria

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“…Additionally, Reis et al (2014a) verified that TS is highly related to TOC and CAM contents, and not to CCF. Table 2.…”

Section: Resultsmentioning

confidence: 81%

“…In addition, studies on the soil structural quality, associated with different soil managements, have been postulated for soil tensile strength (TS) and friability (F) (Blanco-Moure et al, 2012;Reis et al, 2014aReis et al, , 2014b.…”

Section: Introductionmentioning

confidence: 99%

Tensile strength, friability, aggregation, and soil organic matter physical fractions of an Oxisol cultivated with sugarcane

Kunde

Lima

Silva

et al. 2018

Pesq. agropec. bras.

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-The objective of this work was to evaluate the tensile strength, friability, aggregation, and the physical fractions of soil organic matter of a Rhodic Hapludox cultivated with sugarcane (Saccharum officinarum). The treatments consisted of one, three, and five years of cultivation of sugarcane, in the state of Rio Grande do Sul, Brazil. As a reference, a native forest adjacent to the cultivation area, with soil and relief characteristics similar to those of the cultivation areas, was used. Deformed samples were collected at 0.00-0.05, 0.05-0.10, and 0.10-0.20-m soil depths, for the determination of the soil physical attributes and for the physical fractionation of particle-size and density of the organic matter. The physical attribute evaluations were able to detect changes in the structural quality of the Oxisol, which resulted from the sugarcane cultivation. In comparison with the native forest, the stability and tensile strength of the aggregates decreased with the time of sugarcane cultivation. Tensile strength increased with soil depth, proportionally to the reduction of total soil organic carbon content. Soil preparation and straw burning reduce the input of fresh organic matter into the soil and accelerate the decomposition of the labile organic matter compartment, with negative consequences to soil physical properties over time.Index terms: Saccharum officinarum, organic carbon, organic matter fractionation, soil physical quality. Resistência tênsil, friabilidade, agregação e frações físicas da matéria orgânica de um Latossolo Vermelho cultivado com cana-de-açúcarResumo -O objetivo deste trabalho foi avaliar a resistência tênsil, a friabilidade, a agregação e as frações físicas da matéria orgânica de um Latossolo Vermelho cultivado com cana-de-açúcar (Saccharum officinarum). Os tratamentos consistiram de um, três e cinco anos de cultivo de cana-de-açúcar, no Estado do Rio Grande do Sul. Como referência, utilizou-se uma mata nativa, adjacente à área de cultivo, com características de solo e relevo similares às das áreas de cultivo. Foram coletadas amostras deformadas à profundidade de 0,00-0,05, 0,05-0,10 e 0,10-0,20 m, para determinação dos atributos físicos do solo e para o fracionamento físico densimétrico e granulométrico da matéria orgânica. As avaliações dos atributos físicos foram capazes de detectar alterações da qualidade estrutural do Latossolo resultantes do cultivo de cana-de-açúcar. Em comparação à mata nativa, a estabilidade e a resistência tênsil dos agregados diminuíram com o tempo de cultivo da cana-de-açúcar. A resistência tênsil aumentou com a profundidade no solo, proporcionalmente à redução dos teores de carbono orgânico total. O preparo do solo e a queima da palhada reduzem o aporte de matéria orgânica fresca ao solo e aceleram a decomposição do compartimento lábil da matéria orgânica, com consequências negativas às propriedades físicas do solo ao longo do tempo.Termos para indexação: Saccharum officinarum, carbono orgânico, fracionamento da matéria orgânica, qualidade físi...

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“…Soil W is directly linked to friability -the tendency of a mass of soil to crumble into smaller aggregates of certain size range under an applied stress (Utomo and Dexter, 1981). Soil aggregate σ t and friability are indications of soil structural quality (Reis et al, 2014). Friability could determine the damage done to the soil structure by tillage (Watts and Dexter, 1998).…”

Section: Introductionmentioning

confidence: 99%

Influence of wood-derived biochar on the physico-mechanical and chemical characteristics of agricultural soils

Ahmed¹,

Raghavan²

2018

International Agrophysics

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A b s t r a c t. Amendment of soil with biochar has been shown to enhance fertility and increase crop productivity, but the specific influence of biochar on soil workability remains unclear. Select physico-mechanical and chemical properties of clay loam and sandy loam soils were measured after amendment with wood-derived biochar of two particle size ranges (0.5-425 and 425-850 µm) at five dosages ranging from 0.5 to 10% dry weight. Whereas the clay loam soil workability decreased when the finer wood-derived biochar was applied at rates of 6 or 10%, soil fertility was not enhanced. The sandy loam soil, due to Proctor compaction, significantly decreased in bulk density with 6 and 10% wood-derived biochar amendments indicating higher soil resistance to compaction.

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Tensile strength and friability of an Alfisol under agricultural management systems

Cited by 7 publications

References 15 publications

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Critical values of physical attributes of an Ultisol under uses in South of Brazil

Tensile strength, friability, aggregation, and soil organic matter physical fractions of an Oxisol cultivated with sugarcane

Influence of wood-derived biochar on the physico-mechanical and chemical characteristics of agricultural soils

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