Influence of ryegrass on physico-chemical properties of a fragipan soil

Matocha, Christopher J.; Karathanasis, Tasios D.; Murdock, Lloyd W.; Grove, John H.; Goodman, Jack P.; Call, Dottie

doi:10.1016/j.geoderma.2017.12.004

Cited by 16 publications

(15 citation statements)

References 47 publications

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“…The higher bulk density of F samples, ranging from 1.45 to 1.75 g cm − 3 , was comparable with data from Lindbo et al (1994), who reported a range of 1.45-1.78 g cm − 3 for fragipan horizons of Glossic Fragiudalfs in the US, and with Matocha et al (2018) who studied Typic Fragiauldalfs forming on loess in South-Eastern USA (range 1.62-1.78 g cm − 3 ). Thus, F samples had lower total porosity, as expected.…”

Section: Discussionsupporting

confidence: 89%

Atterberg limits fail in recognizing fragipan horizons

Stanchi

Negri

D’Amico

et al. 2021

CATENA

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Fragipan is a subsurface soil horizon characterized by high bulk density, coupled with an abundance of fine, blind pores. We hypothesized that this distinctive porosity pattern could affect the Atterberg limits, with significant deviations from those of otherwise comparable soil horizons. Additionally, longer pre-wetting times might be needed to determine the liquid and plastic limits in fragipan, due to restrictions in water movements. Based on these hypotheses, our research focused on (1) assessing the most suitable fragipan-specific sample preparation time for liquid and plastic limit determination; (2) evaluating if the Atterberg limits reflect the presence of fragic properties; (3) exploring the relationships between Atterberg limits and other relevant soil properties through Artificial Neural Networks. Fragipan horizons (F) had a slightly higher liquid limit, much higher bulk density, and specific surface area than nonfragipan (NF). The plastic limit was however comparable for F and NF. Thus, fragipans had a larger interval of plasticity, which is in contrast with slaking tests and wellknown field evidence. Despite the expected differences between F and NF, three hours' pre-wetting was enough for all samples. This might be due to the size fraction used in the analysis, more sensitive to collapse upon water saturation than bigger clods. Atterberg limits did not help in discriminating F from NF, despite the relevant differences in other soil physical properties. Neural Networks showed that the transition from the plastic to the liquid state was mainly driven by texture and specific surface area, while the plasticity interval was mainly affected by the bulk density. These results provided further insights into the mechanical properties of fragipan horizons.

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Section: Discussionsupporting

confidence: 89%

Atterberg limits fail in recognizing fragipan horizons

Stanchi

Negri

D’Amico

et al. 2021

CATENA

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“…Subsoiling is a fairly expensive operation that needs a special tillage tool and a powerful tractor. If it would be possible, it would be preferable if the subsoil could be ameliorated by biological means, such as deep rooting perennials in the rotation or fall-planted cover crops (Matocha et al, 2018). However, the potential to use these crops is limited because of the seasonally high water table in these soils.…”

Section: Resultsmentioning

confidence: 99%

In‐row subsoiling benefits maize yield on soil with a shallow fragipan

Duiker

2020

Crop Forage & Turfgrass Mgmt

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Past research showed no yield improvement with subsoiling compared with no‐tillage on well‐drained soils in Pennsylvania. However, subsoiling may benefit crop yields on soils with a compacted subsoil, such as a fragipan. Fragipan soils cover 30% of the land surface of Pennsylvania and 27 million acres in the United States. This study was conducted to determine whether subsoiling an Andover loam soil (fine‐loamy, mixed, active, mesic Typic Fragiaquult) with a fragipan starting at 19 inches and a seasonally high water table would result in maize (Zea mays L.) yield improvements compared with no‐till. The research took place at Rock Springs, central Pennsylvania, from 2012 to 2014. Soil was subsoiled every spring to a 17‐inch depth with a straight‐shank subsoiler with straight tips and fluted coulters behind it. Approximately 80% of the soil surface remained undisturbed, guaranteeing soil erosion protection by crop residue and soil health maintenance. Penetration resistance was reduced by subsoiling to 14 inches the first year, and penetration resistance was still significantly lower than under no‐tillage 1 year later at 7 to 13 inches deep. On average, subsoiling increased maize yields by 11%. This research shows that subsoiling with reduced surface disturbance can increase maize yields on soils with a shallow fragipan while maintaining the benefits of conservation tillage for soil health.

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“…Dentre elas, destacam-se a arquitetura do sistema radicular extenso e com raízes finas, o alto teor de polissacarídeos e a elevada população de hifas micorrízicas em comparação com outras gramíneas (Liu et al, 2005;Naveed et al, 2017;Tisdall e Oades, 1979, 1982. Além disso, as raízes do azevém anual liberam exudados ricos em carbono orgânico que atuam como agentes cimentantes (Matocha et al, 2018).…”

Section: Azevém Anualunclassified

“…O maior (p ≤ 0.05) conteúdo de COS no SRZ (Tabela 2) pode estar associado com os exudados liberados pelas raízes, que são ricos em carbono orgânico, ou ainda pela biodisponibilização da matéria orgânica associada ao mineral, que pode ser mobilizada e solubilizada por exsudatos radiculares de baixo peso molecular (Jilling et al, 2018;Matocha et al, 2018;Mueller et al, 2019).…”

Section: Granulometria E Propriedades Químicas E Eletroquímicas Das A...unclassified

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Movimento de água e solutos na rizosfera

Batista¹

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Movimento de água e solutos na rizosfera / Aline Martineli Batista. -versão revisada de acordo com a Resolução CoPGr 6018 de 2011. --Piracicaba, 2022. p.Tese (Doutorado) --USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Deslocamento miscível 2. Curva breakthrough 3. Estabilidade de agregados 4. Atividade microbiológica I. Título Dedico este trabalho aos grandes professores e pesquisadores pelos quais eu tive a honra de ser orientada ao longo da minha jornada acadêmica:

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Influence of ryegrass on physico-chemical properties of a fragipan soil

Cited by 16 publications

References 47 publications

Atterberg limits fail in recognizing fragipan horizons

Atterberg limits fail in recognizing fragipan horizons

In‐row subsoiling benefits maize yield on soil with a shallow fragipan

Movimento de água e solutos na rizosfera

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