Least limiting water range indicators of soil quality and corn production, eastern Ontario, Canada

Lapen, David R.; Topp, G. C.; Gregorich, E.G.; Curnoe, W. E.

doi:10.1016/j.still.2004.02.004

Cited by 115 publications

(116 citation statements)

References 34 publications

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“…Torna-se necessária uma análise crítica a respeito do momento em que ocorre alteração nos limites do IHO (Leão et al, 2004 cultura por oferecer restrições mecânicas ao sistema radicular, mesmo em elevado conteúdo de água no solo, corroborando estudo de Oliveira et al (2007), além de deficiência na aeração, quando este se encontrar com o conteúdo de água próximo a θ cc (Lapen et al, 2004) (Figura 2b). Entretanto, a colheita mecanizada não levou à Dsc, independentemente do conteúdo de água, o que implica menor risco de exposição das culturas, em condições físicas severas, até o desenvolvimento das plantas.…”

Section: Resultsunclassified

“…Solos com estrutura preservada apresentam restrições apenas em termos de déficit hídrico. Entretanto, quando a compactação atinge níveis excessivos, a aeração se torna deficiente sob condições de elevados conteúdos de água, e a resistência à penetração pode restringir o crescimento das plantas com o secamento do solo (Lapen et al, 2004). Nesse cenário, o IHO significa grande avanço nos estudos de biofísica do solo, sendo o indicador que melhor se correlaciona com o crescimento das plantas (Tormena et al, 2007).…”

Section: Introductionunclassified

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Pressão de preconsolidação e intervalo hídrico ótimo como indicadores de alterações estruturais de um latossolo e de um cambissolo sob cana-de-açúcar

Severiano

Oliveira²,

Júnior³

et al. 2008

Rev. Bras. Ciênc. Solo

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Section: Resultsunclassified

Section: Introductionunclassified

Pressão de preconsolidação e intervalo hídrico ótimo como indicadores de alterações estruturais de um latossolo e de um cambissolo sob cana-de-açúcar

Severiano

Oliveira²,

Júnior³

et al. 2008

Rev. Bras. Ciênc. Solo

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“…LLWR considers oxygen deficit and impeditive soil resistance to penetration in addition to AW, and is thus becoming a useful soil physical quality indicator for identifying if a specific management practice is improving or degrading potential soil productivity. This indicator has been used to evaluate soil structural and physical quality for plant growth for a wide range of soils, crops and management conditions (Betz et al, 1998;Tormena et al, 1999;Lapen et al, 2004;Mishra et al, 2015). The LLWR combines into a single number non-thermal soil physical properties that directly influence plant growth.…”

Section: Introductionmentioning

confidence: 99%

Corn stover harvest and tillage impacts on near-surface soil physical quality

Tormena

Karlen

Logsdon

et al. 2017

Soil and Tillage Research

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and Cherubin, Maurício R., "Corn stover harvest and tillage impacts on nearsurface soil physical quality" (2017). Publications from USDA-ARS / UNL Faculty. 1628Faculty. . http://digitalcommons.unl.edu/usdaarsfacpub/1628 Corn stover harvest and tillage impacts on near-surface soil physical quality Excessive harvest of corn (Zea mays L.) stover for ethanol production has raised concerns regarding negative consequences on soil physical quality. Our objective was to quantify the impact of two tillage practices and three levels of corn stover harvest on near-surface soil physical quality through the Least Limiting Water Range (LLWR). We evaluated no harvest, moderate and high stover harvest treatments within no-tillage and chisel plow plots following seven years of continuous corn production. Forty undisturbed soil samples were taken from the 0-7.5 cm deep layer within each treatment and used to determine water retention curves, soil resistance to penetration and bulk density values (Bd). No-tillage plots had higher average soil bulk density and resistance to penetration values, and were more affected by stover harvest than chisel plow plots. The results confirmed that soil resistance to penetration determined the lower limit of the LLWR regardless of tillage or stover treatment, whereas soil aeration controlled the upper limit only at Bd > 1.45 and Bd > 1.55 Mg m À3 for chisel plow and no-tillage, respectively. The LLWR was smallest for no-tillage with moderate or high corn stover harvest, indicating poor soil physical condition for plant growth, while the largest LLWR occurred with moderate stover harvest and chisel plowing. The introduction of alfalfa (Medicago sativa L.) into an extended rotation with no-tillage improved the LLWR by reducing the potential crop growth restriction due to resistance to penetration. Although bulk density values were only occasionally higher than the critical level (Bd = 1.60 Mg m À3 for chisel plow and Bd = 1.64 Mg m À3 for no-tillage), lower soil structure quality was evident with no-tillage under moderate or high stover harvest and with chisel plowing under high stover removal. The LLWR was more sensitive than available soil water content for detecting tillage and stover harvest effects on soil structural degradation.

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“…The least limiting water range has been effectively utilized in soil physics to monitor soil use and tillage systems, in three ways: to evaluate physical quality towards plant growth (Tormena et al, 1999;Wu et al, 2003); to establish relations between this indicator and the aerial part of plant growth (Silva & Kay, 1996); to investigate functional relationships between LLWR and grain yield (Benjamin et al, 2003;Lapen et al, 2004;Beutler et al, 2005;Collares et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Soil compaction by machine traffic and least limiting water range related to soybean yield

Beutler

Centurion

Silva

et al. 2008

Pesq. agropec. bras.

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-The research aimed to evaluate machine traffic effect on soil compaction and the least limiting water range related to soybean cultivar yields, during two years, in a Haplustox soil. The six treatments were related to tractor (11 Mg weight) passes by the same place: T 0 , no compaction; and T 1* , 1; T 1 , 1; T 2 , 2; T 4 , 4 and T 6 , 6. In the treatment T 1* , the compaction occurred when soil was dried, in 2003/2004, and with a 4 Mg tractor in 2004/2005. Soybean yield was evaluated in relation to soil compaction during two agricultural years in completely randomized design (compaction levels); however, in the second year, there was a factorial scheme (compaction levels, with and without irrigation), with four replicates represented by 9 m 2 plots. In the first year, soybean [Glycine max (L.) Merr.] cultivar IAC Foscarim 31 was cultivated without irrigation; and in the second year, IAC Foscarim 31 and MG/BR 46 (Conquista) cultivars were cultivated with and without irrigation. Machine traffic causes compaction and reduces soybean yield for soil penetration resistance between 1.64 to 2.35 MPa, and bulk density between 1.50 to 1.53 Mg m -3 . Soil bulk density from which soybean cultivar yields decrease is lower than the critical one reached at least limiting water range (LLWR = 0).Index terms: Glicine max, soil management, soil physical quality. Compactação do solo por tráfego de máquinas e intervalo hídrico ótimo na produtividade de sojaResumo -O estudo objetivou a avaliação do efeito do tráfego de máquinas sobre a compactação do solo, e a avaliação do intervalo hídrico ótimo e sua relação com a produtividade de cultivares de soja, durante dois anos, em Latossolo Vermelho. Os seis tratamentos foram relativos a passadas de trator (peso de 11 Mg) pelo mesmo local: T 0 , sem compactação; T 1* , 1; T 1 , 1; T 2 , 2; T 4 , 4 e T 6 , 6.

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Least limiting water range indicators of soil quality and corn production, eastern Ontario, Canada

Cited by 115 publications

References 34 publications

Pressão de preconsolidação e intervalo hídrico ótimo como indicadores de alterações estruturais de um latossolo e de um cambissolo sob cana-de-açúcar

Pressão de preconsolidação e intervalo hídrico ótimo como indicadores de alterações estruturais de um latossolo e de um cambissolo sob cana-de-açúcar

Corn stover harvest and tillage impacts on near-surface soil physical quality

Soil compaction by machine traffic and least limiting water range related to soybean yield

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