Resistência Mecânica do Solo à Penetração em Função da sua Umidade e do Tipo de Penetrômetro

Souza, Elder Barboza de; Filho, Alves; Pimenta, Wisy Alves; Nagahama, H.; Cortez, Jorge Wilson

doi:10.13083/1414-3984.v22n01a08

Cited by 5 publications

(4 citation statements)

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“…Vale ressaltar que todas as áreas estão sobre mesmo tipo de solo, Argissolo. Este tipo de solo, por característica, possui uma camada adensada, formada pela eluviação de argila da camada superficial em seu perfil, fazendo com que a percolação de água seja limitada entre os horizontes do solo (Souza et al, 2014) Com isso, pode-se dizer que, a sucessão natural e sua interferência na cobertura vegetal dos solos têm papel importante no controle do escoamento superficial, já que para os casos de estudo, áreas sobre Argissolo apresentam grandes limitações à infiltração, independente do manejo utilizado. Deste modo, garantir uma boa e diversa cobertura vegetal poderia resultar em uma maior retenção de água, diminuindo sua velocidade superficial e a possibilidade do desenvolvimento de processos erosivos.…”

Section: áReasunclassified

Agregação de solo em pastagens sob diferentes índices de qualidade e sua influência na infiltração de água

Freitas

Melloni

2021

Rev. Bras. Geog. Fis.

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In Brazil, extensive livestock farming predominates, often in soils with low agricultural potential and susceptible to degradation, mainly in terms of physical aspects and water infiltration. Thus, this work aims to analyze the impact caused by the succession process in soil of different pasture areas, with an emphasis on their physical quality and physical-hydric characteristics, relating them to the role played by naturally observed ecosystem services. For this, 4 grazing areas were selected, in Red Ultisol, under different levels of natural succession: grazing in good visual conditions (PB); pasture under low scrub (CB); pasture under high scrub (CA); pasture under “capoeirão” (CAO), in the Ribeirão José Pereira microbasin (Itajubá - MG). The physical attributes were determined: soil density, porosity, size and stability of aggregates, as well as their classification as to the formation path. The infiltration analysis was carried out with the aid of a Guelph permeameter and the resistance to mechanical penetration of the soil with an impact penetrometer. For analysis of the results, analysis of variance and Tukey test at 5%, Pearson's correlation and multivariate statistics of main components were used. The natural succession in abandoned pastures improves the physical quality of the soil, with the production of larger, more stable aggregates and of biogenic formation over time. The areas could be classified according to their quality, in the following increasing order: PB < CB < CA < CAO, which respected the action of natural succession and, therefore, of ecosystem services.

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Section: áReasunclassified

Agregação de solo em pastagens sob diferentes índices de qualidade e sua influência na infiltração de água

Freitas

Melloni

2021

Rev. Bras. Geog. Fis.

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“…Other authors define as 2.0 MPa the limit above which restrictions occur to the root system, being this value usually found below the 0.10-0.20 m layer (Suzuki, 2005). In addition, according to Souza et al (2014), PR increases exponentially as moisture decreases due to an increase of cohesive forces between soil particles.…”

Section: Factormentioning

confidence: 99%

Soil Attributes and Initial Corn Development as a Function of Fertilization and Intercropping Systems

et al. 2019

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Fertilization systems that allow higher sowing speeds have been used in areas of grain production, as well as the use of intercropping to improve soil physical quality and provide better soil cover. This study aimed to evaluate soil attributes and the initial corn development and intercropping (corn + velvet bean, corn + pigeonpea, and corn + bonavist bean) as a function of fertilization systems (pre-sowing and sowing). The experiment was conducted in an Oxisol in a randomized block design in the 2 × 3 factorial scheme, with four replications. The number of days for emergence, plant stand, intercropping dry matter, soil straw cover, soil straw permanence index, penetration resistance, soil moisture, soil density, degree of compaction, and total soil porosity were measured. The percentage of soil straw cover was affected by fertilization system, mainly by pre-sowing fertilization. Soil physical attributes were not affected by fertilization and intercropping systems, except total porosity, in the 0-0.10 m layer, which has a combined effect of factors. The initial corn development was not affected by fertilization and intercropping systems. Velvet bean presented the highest number of days for the emergence and lower dry matter.

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“…The operation of the penetrometer is based on quantifying the resistance that the soil offers to the penetration of a conical tip, relating the areas in which the roots would find an impediment to their growth (MOLIN et al 2012;SOUZA et al, 2014), but the evaluation is influenced by factors such as soil texture, soil density and especially soil moisture (CORTEZ et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Penetrometers to Determine the Resistance to Penetration in Oxisol in Pasture Land in the Cerrado

Ferreira

Marasca²,

Júnior

et al. 2022

RBAS

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Soil penetration resistance (PR) is the most common and practical way to estimate the level of soil densification/compaction. The use of PR is evident in most studies, but a large unexplained the differenttypes of penetrometers capable of quantifying it. Their principle is to measure the soil resistance when isinserting a cone-tipped rod to a specific depth. This study aimed to compare the use of two penetrometers/penetrographs to determine the PR of a clayey soil: one static penetrometer (impact) and another dynamic(digital). For this purpose, three treatments in distinct forage plants were evaluated: i) Cynodon nlemfuensis,ii) Cynodon dactylon and iii) Cynodon plectostachyus. Soil penetration resistance and soil moisture wereassessed at two depths, i.e., 0–20 cm and 20–40 cm. PR values ranged from 3.0 to 3.9 MPa between the areas,and soil moisture ranged from 13 to 14%. We found a high correlation between the results of penetrometerswith R2=0,93 and R2=0,95 at 0-20 and 20-40 cm, respect from impact and digital penetrometer. The ANOVAdid not show significant differences (0.05 scored in Tukey test) for the three selected treatments, indicatingsimilar efficiency of the penetrometers for determining PR values in clayey soil in Cerrado. The methods forevaluating soil penetration resistance can present equal values through the adjustment equation.

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Resistência Mecânica do Solo à Penetração em Função da sua Umidade e do Tipo de Penetrômetro

Cited by 5 publications

References 0 publications

Agregação de solo em pastagens sob diferentes índices de qualidade e sua influência na infiltração de água

Agregação de solo em pastagens sob diferentes índices de qualidade e sua influência na infiltração de água

Soil Attributes and Initial Corn Development as a Function of Fertilization and Intercropping Systems

Penetrometers to Determine the Resistance to Penetration in Oxisol in Pasture Land in the Cerrado

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