Seasonal changes in soil physical properties under long-term no-tillage

Moreira, Wagner Henrique; Karlen, Douglas L.; Silva, Álvaro Pires da; Keller, Thomas; Betioli, Edner

doi:10.1016/j.still.2016.02.007

Cited by 79 publications

(39 citation statements)

References 47 publications

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“…Although fertilizer was distributed in the row position, successive changes between row and inter-row Mean values (0.00-0.10 m) No-tillage is classified as conservation management because of the absence of tillage and the maintenance of crop residues on the soil surface. However, the furrow opening for seeding is a mechanical soil disturbance that can modify the soil physical environment in NT crop rows (Moreira et al, 2016). Decreased BD values were found in-row (1.07 Mg m -3 ) compared to inter-row (1.21 Mg m -3 ) for the 0.00-0.10 m depth.…”

Section: Experiments IV -Soil Property Changes Due To Mineral Fertilizmentioning

confidence: 99%

“…Seeding was performed using a seeder/fertilizer with front cutting discs and parabolic tines at a cutting angle of 20°, rod thickness of about 30 mm, and penetration depth from 0.10 to 0.12 m. Undisturbed and disturbed soil samples were collected within each sampling position from the 0.00-0.10 and 0.10-0.20 m layers, just after corn harvest. Further details about soil management and the experimental design are available in Moreira et al (2016).…”

Section: Study Sitesmentioning

confidence: 99%

“…Consequently, the soil physical functioning decreased from on 56 to 53 % of its potential for the in-row and inter-row positions, respectively. Moreira et al (2016) ) between in-row and inter-row positions for the 0.10-0.20 m layer.…”

Section: Experiments IV -Soil Property Changes Due To Mineral Fertilizmentioning

confidence: 99%

See 2 more Smart Citations

Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture

Cherubin

Tormena

Karlen

2017

Rev. Bras. Ciênc. Solo

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Section: Experiments IV -Soil Property Changes Due To Mineral Fertilizmentioning

confidence: 99%

Section: Study Sitesmentioning

confidence: 99%

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Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture

Cherubin

Tormena

Karlen

2017

Rev. Bras. Ciênc. Solo

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“…La actividad humana afecta el ciclo de los nutrientes y, en los agroecosistemas, los cambios en las prácticas de manejo inciden sobre la disponibilidad del nutriente (Richardson, Condron y Haygarth, 2015;Pose, Baeza, Zamuner, Di Gerónimo y Videla, 2016;Moreira et al, 2016).…”

Section: Introductionunclassified

“…Autores tales como Al Salama (2008), Silva Rossi, Rollan y Bachmeier (2013), Moreira et al (2016), Pose et al (2016), entre otros, concluyen que el ajuste de los datos experimentales al modelo de Langmuir (Sparks, 1995) permite evaluar adecuadamente la dinámica del P en una amplia gama de suelos.…”

Section: Introductionunclassified

Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina)

Rollan¹,

Bachmeier²,

Rosi³

et al. 2017

AgriS

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resumenBajo la hipótesis que señala que en condiciones de siembra directa (SD) la estratificación de las propiedades edáficas modifica los parámetros de sorción de fósforo (P), se plantearon como objetivos de este trabajo: i) estimar los parámetros de sorción P mediante uso de isotermas de Langmuir en muestras de distinta profundidad provenientes de lotes de cultivo bajo SD continua; ii) analizar las similitudes y diferencias entre los parámetros obtenidos; y iii) identificar la relación entre las propiedades edáficas del estrato superficial y los parámetros estimados. Se equilibraron muestras de suelo de 0 a 5 y 0 a 20 cm con soluciones de concentración creciente en P. A partir de la relación entre el P adsorbido y la concentración de P en equilibrio se estimó la capacidad máxima de adsorción (Q max ) y la constante de afinidad de retención (k). El mayor Q max y la baja k de las muestras de 0 a 5 cm demuestran que existe un comportamiento diferencial de los primeros centímetros de profundidad. En ese espesor la biodisponibilidad de P y la residualidad de los fertilizantes aplicados están reguladas por fenómenos de adsorción por parte de los coloides orgánicos, acumulados por el proceso de su estratificación asociado a la SD. Under the hypothesis that the stratification of soil properties under direct seeding conditions (SD) modifies P sorption parameters, the objectives of this work were: i) to estimate P sorption parameters by using Langmuir isotherms in samples of different depth, extracted from fields under continuous direct seeding; (ii) to analyze the similarities and differences between the parameters obtained; and (iii) to identify the relationship between the edaphic properties of the surface stratum and the estimated parameters. Soil samples of 0 to 5 and Fecha de recepción: 04/10/2017; fecha de aceptación: 11/12/2017.

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Abiotic pulses and microbial activity lags in greenhouse gas emissions due to tillage

Duval

2020

Agrosystems Geosci & Env

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Tillage affects atmosphere–soil greenhouse gas (GHG) flux by opening soil pore spaces releasing pockets of CO2, CH4, and N2O. Tillage may also stimulate microbes responsible for GHG biogenesis and consumption at longer time scales following a discrete tillage event. I measured soil gas flux immediately after three mechanically different tillage events (moldboard plow, rip‐plow, and disc‐till) over 2 mo within the same field. Delayed effects of tillage on soil respiration were measured; CH4 and N2O fluxes via laboratory incubations on soils were collected following tillage events compared to undisturbed soils. Moldboard plowing did not result in immediate pulses of GHG. Carbon dioxide emissions and CH4 influx to soil peaked 1 h post‐plow. Later rip‐plowing caused a more sustained pulse of CO2 and CH4 uptake over 2 h in the field. Disc‐tillage produced a CO2 production pulse‐then‐decline profile, but CH4 and N2O fluxes were highly variable after this event. Greenhouse gas flux from laboratory‐incubated alfalfa soil and fallow soil were similar to soil collected after rip‐plowing. Soils incubated after the last field tillage event produced significantly lower CO2 emissions during lab incubations compared with other undisturbed and plowed soil. These results show that instantaneous tillage effects are not uniform among GHGs, tillage alteration of soil respiration persists for months following a disturbance, and repeated tillage in the field changes microbial regulation of specific GHGs. Tillage has immediate impacts on GHG flux and has the potential for persistent effects on microbial activity that need further investigation as a GHG abatement tool.

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Seasonal changes in soil physical properties under long-term no-tillage

Cited by 79 publications

References 47 publications

Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture

Soil Quality Evaluation Using the Soil Management Assessment Framework (SMAF) in Brazilian Oxisols with Contrasting Texture

Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina)

Abiotic pulses and microbial activity lags in greenhouse gas emissions due to tillage

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