Long-term effects of organics, fertilizers and cropping systems on soil physical productivity evaluated using a single value index (NLWR)

Verma, Sudhir; Sharma, Pradeep

doi:10.1016/j.still.2007.08.005

Cited by 34 publications

(27 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results, however, are in contrast with those obtained for a clay loam soil by Lapen et al (2004), who reported that air-filled porosity frequently reached values considered to be limiting for appropriate aeration and plant growth. Air-filled porosity is a very dynamic physical property, but in general, degraded soils require more time to reach the 10% air-filled porosity after soil saturation (Verma and Sharma, 2008) than soils in good health.…”

Section: Resultsmentioning

confidence: 99%

“…We also calculated a ratio between LLWR and AW to demonstrate the impacts of tillage and corn stover harvest on available water that would be effectively taken by crops. According to Verma and Sharma (2008), a higher ratio LLWR/AW supported better soil physical condition for wheat (Triticum aestivum) yield.…”

Section: Resultsmentioning

confidence: 99%

“…Other studies that emphasize the importance of SOM for LLWR include those reported by da Silva et al (1994), da Silva and Kay (1997b) and Verma and Sharma (2008).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

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

Tormena

Karlen

Logsdon

et al. 2017

Soil and Tillage Research

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Tormena

Karlen

Logsdon

et al. 2017

Soil and Tillage Research

View full text Add to dashboard Cite

show abstract

“…A necessidade de usar esses estimadores, em razão da dificuldade de modelar a concentração de oxigênio (Jong van Lier, 2010) e a resistência mecânica que o solo oferece à elongação radicular (Bengough, 1997(Bengough, , 2006(Bengough, , 2011Clark et al, 2003), possibilitou a representação matemática do LLWR; no entanto, introduziu relações empíricas ao invés de processos da interface solo-raiz. A partir do trabalho de Orellana et al (1997), o LLWR passou a ser descrito como "intervalo hídrico ótimo" (IHO), com a mesma abordagem conceitual de Silva et al (1994) (Figura 1a (Benjamin et al, 2003;Verma & Sharma, 2008;Gathala et al, 2011;Cavalieri et al, 2012), mas as relações nem sempre foram significativas e em alguns casos foram contraditórias.…”

Section: Introductionunclassified

Indicadores hídrico-mecânicos de compactação do solo e crescimento de plantas

Gubiani

Reichert

Reinert

2013

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

RESUMOO efeito da compactação do solo sobre o crescimento de plantas é uma informação necessária para orientar o manejo do solo. Embora o intervalo hídrico ótimo (IHO) tenha sistematizado a relação entre compactação e fatores físicos diretamente relacionados com o crescimento de plantas, sua eficiência para prever respostas biológicas, sobretudo a produção de grãos, ainda não foi comprovada. Resultados de pesquisas em nível celular indicam que os níveis de estresses hídricos e mecânicos que ocorrem nas raízes durante o secamento do solo são parcialmente representados pelo IHO. Consequentemente, a previsão de resposta no crescimento e na produção das culturas não se confirma na maioria dos casos. Além do refinamento dos limites do IHO, novos índices precisam ser desenvolvidos, com capacidade de integrar a variação dos fatores físicos do solo ao longo do ciclo de crescimento das plantas, determinados por fatores meteorológicos. Indicadores de frequência, período de ausência e acumulado de estresses hídricos mecânicos foram sugeridos. Sem avanços, a capacidade de previsão do risco de redução na produção das culturas por compactação do solo será pequena e insuficiente para orientar ações de manejo do solo.Termos de indexação: plantio direto, intervalo hídrico ótimo, elongação celular. (1) Recebido para publicação em 23 de maio de 2012 e aprovado em 11 de dezembro de 2012. SUMMARY: HYDRIC AND MECHANICAL INDICATORS OF SOIL COMPACTION AND PLANT GROWTH

show abstract

“…It integrates the effects of aeration, soil strength, and water potential into one index on the basis of soil water content. The LLWR can be considered to be a useful indicator of soil physical quality for crop production (Asgarzadeh et al, 2010;da Silva and Kay, 2004;Lapen et al, 2004;Leao et al, 2006;Verma and Sharma, 2008). The LLWR is more sensitive to soil structural changes than available water Zou et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Effect of tillage practices on least limiting water range in Northwest India

Kahlon¹,

Chawla²

2017

International Agrophysics

View full text Add to dashboard Cite

A b s t r a c t. Tillage practices affect mechanical and hydrological characteristics of soil and subsequently the least limiting water range. This quality indicator under the wheat-maize system of northwest India has not been studied yet. The treatments included four tillage modes, namely conventional tillage, no-tillage without residue, no-tillage with residue, and deep tillage as well as three irrigation regimes based on the irrigation water and pan evaporation ratio i.e. 1.2, 0.9, and 0.6. The experiment was conducted in a split plot design with three replications. At the end of cropping system, the mean least limiting water range (m 3 m -3 ) was found to be highest in deep tillage (0.26) and lowest in notillage without residue (0.15). The field capacity was a limiting factor for the upper range of the least limiting water range beyond soil bulk density 1.41 Mg m -3 and after that 10% air filled porosity played a major role. However, for the lower range, the permanent wilting point was a critical factor beyond soil bulk density 1.50 Mg m -3 and thereafter, the penetration resistance at 2 MPa becomes a limiting factor. Thus, deep tillage under compaction and no-tillage with residue under water stress is appropriate practice for achieving maximum crop and water productivity.K e y w o r d s: least limiting water range, tillage, maize, wheat, soil moisture, crop productivity INTRODUCTION

show abstract

Long-term effects of organics, fertilizers and cropping systems on soil physical productivity evaluated using a single value index (NLWR)

Cited by 34 publications

References 17 publications

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

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

Indicadores hídrico-mecânicos de compactação do solo e crescimento de plantas

Effect of tillage practices on least limiting water range in Northwest India

Contact Info

Product

Resources

About