Corn Cob Residue Carbon and Nutrient Dynamics during Decomposition

Wienhold, Brian J.; Varvel, Gary E.; Jin, Virginia L.

doi:10.2134/agronj2011.0002

Cited by 23 publications

(8 citation statements)

References 27 publications

(32 reference statements)

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“…The initial business model for POET-DSM had been to use only the cob fraction as feedstock for cellulosic bioenergy, but that plant fraction accounted for only 12% of the aboveground biomass. That value was lower than expected but in the range reported by Halvorson and Johnson (2009) and Wienhold et al (2011). The potential amount of aboveground stover, estimated from the hand samples collected from each plot, averaged 9.9, 8.4, 8.0 and 7.6 Mg ha -1 in 2008, 2009, 2010, and 2011, respectively.…”

Section: Resultscontrasting

confidence: 54%

Corn stover harvest strategy effects on grain yield and soil quality indicators

Karlen¹,

Birrell²,

Wirt³

et al. 2012

Agrociencia

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A major reason that corn stover was identifi ed as an important feedstock because of the vast area upon which corn is grown in the Midwestern U.S.A. However, corn stover has many other functions within the soil. Therefore, if (1) yields are low, (2) an excessive amount is harvested for any use, or (3) tillage intensities are too aggressive, harvesting stover may decrease the amount of carbon (C) returned to the soil to a level that will not be suffi cient to sustain

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Section: Resultscontrasting

confidence: 54%

Corn stover harvest strategy effects on grain yield and soil quality indicators

Karlen¹,

Birrell²,

Wirt³

et al. 2012

Agrociencia

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“…The process of water infiltration through surface soil under rain-fed conditions is a complex interaction among precipitation intensity, soil type, surface condition, and extent that soil is covered by crop residues (Langhans et al, 2011). Retaining corn stover or wheat straw improved water infiltration in both tilled and no-till fields (Govaerts et al, 2007), while low residue return resulted in an increased risk for run-off (Wienhold et al, 2011). Literature reviewed by Blanco-Canqui and Lal (2009) noted conflicting impacts on water filtration in response to residue cover related to interaction among tillage, soil profile characteristics, and water repellency.…”

Section: Introductionmentioning

confidence: 99%

Corn stover harvest changes soil hydrology and soil aggregation

Johnson

Strock

Tallaksen

et al. 2016

Soil and Tillage Research

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A B S T R A C TIn the United States, commercial-scale cellulosic-ethanol production using corn (Zea mays L.) stover has become a reality. As the industry matures and demand for stover increases, it is important to determine the amount of biomass that can be sustainably harvested while safe-guarding soil quality and productivity. Specific study objectives were to measure indices of soil hydrological and aggregate stability responses to harvesting stover; since stover harvest may negatively impact soil hydrological and physical properties. Responses may differ with tillage management; thus, this paper reports on two independent studies on a tilled (Chisel field) and untilled field (NT1995 field). Each field was managed in a corn/soybean (Glycine max [Merr.]) rotation and with two rates of stover return: (1) all returned (Full Return Rate) and (2) an aggressive residue harvest leaving little stover behind (Low Return Rate). Unconfined field soil hydraulic properties and soil aggregate properties were determined. Hydrological response to residue treatments in the Chisel field resulted in low water infiltration for both rates of residue removal. In NT1995 field, Full Return Rate had greater capacity to transmit water via conductive pathways, which were compromised in Low Return Rate. Collectively, indices of soil aggregation in both experiments provided evidence that the aggregates were less stable, resulting in a shift toward more small aggregates at the expense of larger aggregates when stover is not returned to the soil. In both fields, aggressive stover harvest degraded soil physical and hydrological properties. No tillage management did not protect soil in absence of adequate residue.2016 Published by Elsevier B.V.

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“…Conventional -no removal 0 0 0 0 0 0 and Wienhold et al (2011). The potential amount of aboveground stover, estimated from the hand samples collected from each plot, averaged 9.9, 8.4, 8.0, and 7.6 Mg ha -1 in 2008, 2009, 2010, and 2011, respectively.…”

Section: Treatment 2008 2009 2010 2011 4-year Mean Average Collectionmentioning

confidence: 99%

Corn Stover Harvest Strategy Effects on Grain Yield and Soil Quality Indicators

Karlen¹,

Birrell²,

Wirt³

2013

Agrociencia

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Developing strategies to collect and use cellulosic biomass for bioenergy production is important because those materials are not used as human food sources. This study compared corn (Zea mays L.) stover harvest strategies on a 50 ha Clarion-Nicollet-Webster soil Association site near Emmetsburg, Iowa, USA. Surface soil samples (0 to 15 cm) were analyzed after each harvest to monitor soil organic carbon (SOC), pH, phosphorus (P) and potassium (K) changes. Grain yields in 2008, before the stover harvest treatments were imposed, averaged 11.4 Mg ha-1. In 2009, 2010, and 2011 grain yields averaged 10.1, 9.7, and 9.5 Mg ha-1 , respectively. Although grain yields after stover harvest strategies imposed were lower than in 2008, there were no significant differences among the treatments. Four-year average stover collection rates ranged 1.0 to 5.2 Mg ha-1 which was 12 to 60% of the above-ground biomass. SOC showed a slight decrease during the study, but the change was not related to any specific stover harvest treatment. Instead, we attribute the SOC decline to the tillage intensity and lower than expected crop yields. Overall, these results are consistent with other Midwestern USA studies that indicate corn stover should not be harvested if average grain yields are less than 11 Mg ha-1 .

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Corn Cob Residue Carbon and Nutrient Dynamics during Decomposition

Abstract: doi:10.2134/agronj2011.000

Cited by 23 publications

References 27 publications

Corn stover harvest strategy effects on grain yield and soil quality indicators

Corn stover harvest strategy effects on grain yield and soil quality indicators

Corn stover harvest changes soil hydrology and soil aggregation

Corn Stover Harvest Strategy Effects on Grain Yield and Soil Quality Indicators

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