Row Spacing and Seeding Rate Effects on Canola Population, Weed Competition, and Yield in Winter Organic Canola Production

Vann, Rachel; Reberg‐Horton, S. Chris; Brinton, Carrie M.

doi:10.2134/agronj2016.02.0097

Cited by 15 publications

(16 citation statements)

References 27 publications

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“…Angadi, Cutforth, McConkey, and Gan (2003) observed no yield differences with plant densities between 80 and 40 plants m −2 at a 23‐cm row width if the low plant population density was uniformly distributed within the row, but yield was reduced when plant population was unevenly distributed. A study in North Carolina showed that increasing row spacing can allow for inter‐row cultivation and decreased weed pressure which can increase yields when weed pressure is high (Vann, Reberg‐Horton, & Brinton, 2016). Degenhardt and Kondra (1981) tested planting rates of 3, 6, and 12 kg ha −1 and found that rate had no significant effect on seed yield.…”

Section: Introductionmentioning

confidence: 99%

Testing row spacing and planting rate for fall‐planted spring canola in the southern United States

Wynne

Neely²,

Adams³

et al. 2020

Agronomy Journal

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Cultivar selection, planting rate, and row spacing are key considerations when planting canola (Brassica napus L.) and vary by region. Canola offers a possible solution for producers in Texas and the broader southern region looking for a winter rotational crop, but the lack of data on region-specific agronomic practices is a roadblock to adoption. Our objective was to identify the optimum row spacing and planting rate to achieve maximum seed and oil yield in fall-planted spring canola in the southern United States. Replicated studies were conducted at College Station and Perry, TX during the 2017-2018 winter growing season. Treatments included three row spacings (19, 38, and 76 cm), three planting rates (1.7, 3.4, and 5.1 kg ha −1 ), and two cultivars (HyCLASS 930 and HyCLASS 970). HyCLASS 970 outperformed HyCLASS 930 in all yield and seed parameters except seeds pod −1 and oil content at both locations. While row spacing had no effect on yield at College Station, a 15% reduction in seed and oil yield was observed at the widest row spacing at Perry. A cultivar × planting rate interaction at Perry showed yield declining for HyCLASS 930 as planting rate increased, while HyCLASS 970 showed no response. This suggests rates as low as 1.7 kg ha −1 , which is substantially lower than the rate commonly recommended (5.6 kg ha −1 ), can be used for fall-planted spring canola. High yield at Perry and lack of freeze damage suggest spring canola may be a good winter rotational crop for the southern United States.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Introductionmentioning

confidence: 99%

Testing row spacing and planting rate for fall‐planted spring canola in the southern United States

Wynne

Neely²,

Adams³

et al. 2020

Agronomy Journal

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“…Increased seeding rate enhances stand count by reducing weed competition, banded N fertilization limits N availability to weeds, and taller stubble height increases seed germination by increasing soil water storage and limiting light penetration (Assefa et al., 2018; Entz et al., 2002; Strydhorst, King, Lopetinsky, & Harker, 2008; Volkmar & Irvine, 2005). Several researchers (Hanson et al., 2008; Vann et al., 2016) have reported that increased seeding rate increased canola stand count. The reasons for greater stand count in 2009 were not known.…”

Section: Resultsmentioning

confidence: 99%

“…Because the number of crops were similar in both stacked and alternate rotations in our study, the sequence of crops in these rotations did not affect canola seed yield. Some researchers (Assefa et al., 2018; Hanson et al., 2008; Vann et al., 2016) reported that increased seeding rate increased canola seed yield, while others (Chen et al., 2005; Christensen & Drabble, 1984; Degenhardt & Kondara, 1981) found that seeding rate had no effect on seed yield. Seeding rate also had no effect on canola harvest index (Angadi et al., 2003).…”

Section: Resultsmentioning

confidence: 99%

“…Because of the reduction in erucic acid in fatty acid composition and glucosinates, canola is the third most important crop for vegetable oil production after soybean ( Glycine max L.) and palm ( Elaeis guineensis Jacq .) in the world (Assefa et al., 2018; Downey & Rimmer, 1993; Johnston et al., 2002; Vann, Reberg‐Horton, & Brinton, 2016). Both canola and flax had high oil (42–44%) and protein (21–23%) concentrations (Johnston et al., 2002).…”

Section: Introductionmentioning

confidence: 99%

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Stacked crop rotations and cultural practices for canola and flax yield and quality

et al. 2020

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Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by USDA. The USDA is an equal opportunity employer. AbstractCanola (Brassica napus L.) and flax (Linum usitatissimum L.) are important oilseed crops, but improved management practices to enhance their yields and quality are needed. We studied the effect of stacked versus alternate-year crop rotations and traditional versus improved cultural practices on canola and flax growth, seed yield, oil concentration, and N-use efficiency from 2006 to 2011 in the northern Great Plains, USA. Stacked rotations were durum (Triticum turgidum L.)-durum-canola-pea (Pisum sativum L.) (DDCP) and durum-durum-flax-pea (DDFP). Alternate-year rotations were durum-canola-durum-pea (DCDP) and durum-flax-durum-pea (DFDP). The traditional cultural practice included a combination of conventional tillage, recommended seed rate, broadcast N fertilization, and reduced stubble height. The improved cultural practice included a combination of no-tillage, increased seed rate, banded N fertilization, and increased stubble height. Canola stand count was 36-123% greater with the improved than the traditional cultural practice in 2006, 2009, 2010, and 2011. Canola pod number and oil concentration were 3-36% greater in the improved than the traditional practice in 2007 and 2010, but trends reversed by 5-19% in 2008. Flax stand count was 28% greater with DFDP than DDFP in 2007 and 56% greater in the improved than the traditional practice in 2010. Flax pod number, seed weight, seed yield, N content, N-use efficiency, and N-removal index varied with crop rotations, cultural practices, and years. Canola growth and oil concentration increased with the improved cultural practice as well as flax growth, yield, and quality enhanced with alternate-year crop rotation and the improved cultural practice in wet years.

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“…oleifera D.C.) offers various potential production purposes, as food and feed uses [1]. Moreover, oilseed rape cultivation fits well with crop rotations based on winter cereals in Mediterranean-type environments.…”

Section: Introductionmentioning

confidence: 89%

Low-Input Herbicide Management: Effects on Rapeseed Production and Profitability

et al. 2018

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Abstract:The oilseed rape conventional system can be moved to a more sustainable one by reducing herbicide application whilst ensuring at the same time effective weed control, maintaining oilseed rape yield, and quality and increasing profitability. Over three growing season periods, two field experiments at two different Southern Italy locations were carried out. In both sites, a conventional weed-control management system (recommended label dose), four alternative low-herbicide treatments, and an untreated control were compared. We monitored weeds and crop response to herbicide treatments, and calculated the net economic return, within site and year, for each treatment. In experiment 1, a half dose of herbicide did not show any significant difference in seed yield with respect to conventional treatment in two of three growing seasons. In experiment 2, compared with the conventional system, weedy control and the lowest applied herbicide dose treatment (25% of the recommended label dose) did not underline significant differences with regard to yield level. Net returns from the half dose of metazachlor herbicide were not significantly lower than net returns from conventional treatment in experiment 1 (on a three-year average 748 vs. 812 € ha −1 , respectively). Our findings suggest that the herbicide dose might be cut by at least 50% in order not to jeopardize negative effects on production and economic performances.

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Row Spacing and Seeding Rate Effects on Canola Population, Weed Competition, and Yield in Winter Organic Canola Production

Cited by 15 publications

References 27 publications

Testing row spacing and planting rate for fall‐planted spring canola in the southern United States

Testing row spacing and planting rate for fall‐planted spring canola in the southern United States

Stacked crop rotations and cultural practices for canola and flax yield and quality

Low-Input Herbicide Management: Effects on Rapeseed Production and Profitability

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