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Journal articles on the topic 'Canola crop'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Liu, Chang, Yantai Gan, and Lee Poppy. "Evaluation of on-farm crop management decisions on canola productivity." Canadian Journal of Plant Science 94, no. 1 (2014): 131–39. http://dx.doi.org/10.4141/cjps2013-121.

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Liu, C., Gan, Y. and Poppy, L. 2014. Evaluation of on-farm crop management decisions on canola productivity. Can. J. Plant Sci. 94: 131–139. This study determined key factors affecting canola productivity in western Canada and evaluated the differences among soil-climatic zones in canola crops responding to the key agronomic factors. A total of 68 canola farm fields were randomly selected in western Canada, and multiple correspondence analysis, coupled with multivariate predictive model with partial least squares projection and regressions, was used to analyze the data set. Canola produced in

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2

Gill, Kabal S. "Crop rotations compared with continuous canola and wheat for crop production and fertilizer use over 6 yr." Canadian Journal of Plant Science 98, no. 5 (2018): 1139–49. http://dx.doi.org/10.1139/cjps-2017-0292.

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Local economic, logistic, soil, and weather conditions have made appropriate rotations vary from one area to another. Seed yield and fertilizer use in rotations were compared with continuous cropping for 6 yr in the southeast Peace region of Alberta, Canada. Canola (C) (Brassica napus L.), wheat (W) (Triticum aestivum L.), pea (P) (Pisum sativum L.), barley (B) (Hordeum vulgare L.), and flax (F) (Linum usitatissimum L.) were grown in 12 treatments [i.e., continuous canola (CC) and wheat (WW) and rotations of W–C, P–W–W, C–W–W, C–C–W, P–C–W, C–P–W, W–B–C, B–W–C, F–W–C, and F–C–W]. Canola yield

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3

Grant, C. A., M. A. Monreal, R. B. Irvine, R. M. Mohr, D. L. McLaren, and M. Khakbazan. "Crop response to current and previous season applications of phosphorus as affected by crop sequence and tillage." Canadian Journal of Plant Science 89, no. 1 (2009): 49–66. http://dx.doi.org/10.4141/cjps07178.

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Field studies were conducted over a 4-yr period at two locations in western Manitoba, Canada, to evaluate the effect of phosphorus (P) fertilizer management on crop growth as affected by tillage system through a 2-yr cropping sequence. In the first phase of the cropping sequence, canola (Brassica napus L.), a non-mycorrhizal crop, and spring wheat (Triticum aestivum L.), a mycorrhizal crop, were grown under conventional (CT) and reduced (RT) systems, with 0, 11 and 22 kg P ha-1 applied as monoammonium phosphate (MAP). In the second phase of the sequence, flax (Linum usitatissimum L.) was seede

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Hwang, S. F., H. U. Ahmed, Q. Zhou, et al. "Influence of resistant cultivars and crop intervals on clubroot of canola." Canadian Journal of Plant Science 99, no. 6 (2019): 862–72. http://dx.doi.org/10.1139/cjps-2019-0018.

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Clubroot, caused by Plasmodiophora brassicae, is an important constraint on canola (Brassica napus) production in Canada. Rotations of clubroot-resistant (CR) canola cultivars in various sequences and planting intervals between canola with non-host crops and fallow periods were evaluated to determine their effects on clubroot severity and P. brassicae resting spore populations under field and micro-plot conditions. Under micro-plot conditions, the rotation sequences including CR canola, continuous fallow, and the non-host barley reduced gall weight by 63%–100% and clubroot severity by 34%–100%

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5

Soon, Y. K., H. W. Klein-Gebbinck, and M. A. Arshad. "Residue management and crop sequence effects on the yield and brown girdling root rot of canola." Canadian Journal of Plant Science 85, no. 1 (2005): 67–72. http://dx.doi.org/10.4141/p04-058.

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Brown girdling root rot (BGRR) is a serious and widespread disease of canola (Brassica rapa L.) in the Peace River region of northwestern Canada. There is no chemical control treatment for the pathogen, and farmers have observed that the disease is more severe when canola follows red fescue (Festuca rubra L.) or clover (Trifolium spp.) compared to summer fallow. A field study was conducted to determine how crop sequences following red fescue termination can be combined with residue and tillage management to reduce BGRR infection and increase canola yield. The five treatments consisted of rotat

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6

Soon, Y. K., and G. W. Clayton. "Eight years of crop rotation and tillage effects on crop production and N fertilizer use." Canadian Journal of Soil Science 82, no. 2 (2002): 165–72. http://dx.doi.org/10.4141/s01-047.

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Although tillage systems and crop rotations can affect crop production and uptake of nutrients, their long-term effects, particularly their interactions, are not well-documented. Therefore, we measured the N, P, and K contents and yields of crops through two rotation cycles, especially wheat (Triticum aestivum L.), of four crop rotations managed under conventional tillage (CT) and no-tillage (NT) systems. The study was conducted 1993 through 2000 on a sandy loam soil in northwestern Alberta, Canada. The four-course crop rotations were: (i) field pea (Pisum sativum L.)-wheat-canola (Brassica ra

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7

Page, Eric R., Sydney Meloche, Meghan Moran, Brian Caldbeck, and Véronique Barthet. "Effect of seeding date on winter canola (Brassica napus L.) yield and oil quality in southern Ontario." Canadian Journal of Plant Science 101, no. 4 (2021): 490–99. http://dx.doi.org/10.1139/cjps-2020-0220.

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Winter canola or winter oilseed rape (Brassica napus L.) is not commonly grown in Canada. While winter oilseed rape is the dominant growth form in Europe, Canadian canola production is dominated by spring types in western Canada. Research conducted in the 1980s indicated that the environmental conditions in southern Ontario are well suited to the production of winter canola. Since then, however, interest in the crop has ebbed, and little to no research has been conducted on the agronomic issues that potentially limit its adoption in the province. The objective of this research was to identify

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8

Harker, K. N., J. T. O’Donovan, E. G. Smith, et al. "Seed size and seeding rate effects on canola emergence, development, yield and seed weight." Canadian Journal of Plant Science 95, no. 1 (2015): 1–8. http://dx.doi.org/10.4141/cjps-2014-222.

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Harker, K. N., O’Donovan, J. T., Smith, E. G., Johnson, E. N., Peng, G., Willenborg, C. J., Gulden, R. H., Mohr, R., Gill, K. S. and Grenkow, L. A. 2015. Seed size and seeding rate effects on canola emergence, development, yield and seed weight. Can. J. Plant Sci. 95: 1–8. Canola (Brassica napus L.) is the most common dicotyledonous crop in Canada. Here we determine the effect of canola seed size and seeding rate on canola emergence, development, yield and seed weight. In 2013, direct-seeded experiments were conducted at nine western Canada locations. Four canola seed sizes (1000-seed weights

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9

O'Donovan, John T., K. Neil Harker, George W. Clayton, and Robert E. Blackshaw. "Comparison of a Glyphosate-Resistant Canola (Brassica napusL.) System with Traditional Herbicide Regimes." Weed Technology 20, no. 2 (2006): 494–501. http://dx.doi.org/10.1614/wt-05-092r.1.

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Herbicide-resistant cultivars account for over 90% of the canola grown in western Canada and cultivars resistant to glyphosate dominate the market. Field experiments were conducted at three locations in Alberta to compare the glyphosate system with more traditional herbicide regimes. Glyphosate applied before seeding in spring resulted in better weed control, lower dockage, and higher canola yield and net return than 2,4-D applied in the fall. Glyphosate applied once (two- to four-leaf canola) or twice (two- to four-leaf followed by five- to six-leaf canola) in-crop provided similar weed contr

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10

Irvine, B., and G. P. Lafond. "Pushing canola instead of windrowing can be a viable alternative." Canadian Journal of Plant Science 90, no. 2 (2010): 145–52. http://dx.doi.org/10.4141/cjps08180.

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Compared with direct harvesting, windrowing canola (Brassica napus L.) crop reduces maturation time and seed losses caused by shattering; however, windrows are prone to wind damage. While direct harvesting canola may reduce costs and lower green seed content, new technologies are required to effectively reduce shattering losses. Pushing is a potential replacement for swathing where pod movement is restricted by mechanically lodging the crop and letting the crop mature while still attached to the root system. This system purports to limit shattering and improve seed quality. Trials were conduct

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11

Beckie, H. J., K. N. Harker, L. M. Hall, et al. "A decade of herbicide-resistant crops in Canada." Canadian Journal of Plant Science 86, no. 4 (2006): 1243–64. http://dx.doi.org/10.4141/p05-193.

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This review examines some agronomic, economic, and environmental impacts of herbicide-resistant (HR) canola, soybean, corn, and wheat in Canada after 10 yr of growing HR cultivars. The rapid adoption of HR canola and soybean suggests a net economic benefit to farmers. HR crops often have improved weed management, greater yields or economic returns, and similar or reduced environmental impact compared with their non-HR crop counterparts. There are no marked changes in volunteer weed problems associated with these crops, except in zero-tillage systems when glyphosate is used alone to control can

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12

Mierau, Allyson, Moria E. Kurtenbach, Eric N. Johnson, et al. "Herbicide programs for control of glyphosate-resistant canola (Brassica napus) in glyphosate-resistant soybean." Weed Technology 34, no. 4 (2020): 540–46. http://dx.doi.org/10.1017/wet.2020.2.

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AbstractGlyphosate-resistant (GR) canola is a widely grown crop across western Canada and has quickly become a prolific volunteer weed. Glyphosate-resistant soybean is rapidly gaining acreage in western Canada. Thus, there is a need to evaluate herbicide options to manage volunteer GR canola in GR soybean crops. We conducted an experiment to evaluate the efficacy of various PRE and POST herbicides applied sequentially to volunteer GR canola and to evaluate soybean injury caused by these herbicides. Trials were conducted across Saskatchewan and Manitoba in 2014 and 2015. All treatments provided

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13

Raddatz, R. L., C. F. Shaykewich, and P. R. Bullock. "Prairie crop yield estimates from modelled phenological development and water use." Canadian Journal of Plant Science 74, no. 3 (1994): 429–36. http://dx.doi.org/10.4141/cjps94-080.

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The feasibility of estimating average yields of spring wheat, barley and canola for Manitoba, Saskatchewan and Alberta, individually and collectively, from crop-specific model output routinely published in the Winnipeg Climate Centre's Agrometeorological Outlooks was examined. Statistically significant correlations were found between crop district/census division yields for 1988–1992 and modelled end-of-season crop water-use, and between these yields and the end-of-season ratios of water-use to water-demand and modelled days-to-maturity. Up to 69% of the observed variance in spring wheat yield

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14

O'Donovan, John T., Arvind K. Sharma, Ken J. Kirkland, and E. Ann De St. Remy. "Volunteer Barley (Hordeum vulgare) Interference in Canola (Brassica campestrisandB. napus)." Weed Science 36, no. 6 (1988): 734–39. http://dx.doi.org/10.1017/s0043174500075743.

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The yield potential and the effect on yield loss of canola of different densities of volunteer barley were investigated at three locations in western Canada. Field studies were conducted from 1982 to 1986. Rectangular hyperbolic models based on data pooled over years, locations, and canola cultivars, and incorporating different densities of volunteer barley and canola accurately portrayed field responses in most instances. Results indicated that volunteer barley severely reduced canola yield. However, financial losses due to reduced canola yield were partly offset by the volunteer barley crop.

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15

Kiniry, J. R., J. R. Williams, D. J. Major, et al. "EPIC model parameters for cereal, oilseed, and forage crops in the northern Great Plains region." Canadian Journal of Plant Science 75, no. 3 (1995): 679–88. http://dx.doi.org/10.4141/cjps95-114.

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The EPIC computer simulation model has potential for assessing agricultural management scenarios in the northern Great Plains region of the United States and western Canada. The objectives of this study were to develop parameters for economically important crop and forage species grown in these regions and to determine whether EPIC could use these parameters to reasonably simulate yields. Parameters for leaf-area development, temperature responses, biomass growth and partitioning, and nutrient concentrations were derived from data in the literature for spring canola, wheat, barley, maize and s

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16

O’Donovan, J. T., R. E. Blackshaw, K. N. Harker, G. W. Clayton, and D. C. Maurice. "Field evaluation of regression equations to estimate crop yield losses due to weeds." Canadian Journal of Plant Science 85, no. 4 (2005): 955–62. http://dx.doi.org/10.4141/p05-041.

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Various regression equations based on weed density alone, or relative time of weed and crop emergence or crop density in addition to weed density have been developed in western Canada to estimate the effects of wild oat (Avena fatua L.) and volunteer cereals on yield loss of field crops, and to advise farmers on the economics of weed control with herbicides. In 1997, 1998, and 1999, several of these equations were evaluated in 9 barley (Hordeum vulgare L.), 9 wheat (Triticum aestivum L.) and 11 canola (Brassica napus L.) fields in Alberta. Wild oat was the dominant weed in the barley and wheat

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17

Omokanye, Akim, Yamily Zavala, Dianne Westerlund, Liisa Jeffrey, and Buthaina Al-Maqtari. "Strategies to Reduce Inorganic Fertilizer Inputs in Crop Production through Integrated Crop-livestock Systems." Sustainable Agriculture Research 11, no. 1 (2022): 45. http://dx.doi.org/10.5539/sar.v11n1p45.

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Adequate nutrition is essential for crop growth, production, and profit potential for farmers, but chemical fertilizer costs alone can constitute a greater portion of the total variable costs for wheat and canola. The present study evaluated seven cropping treatments (CT) in a 3-year crop rotation under two different soil types. Five of the CTs consisted of a one-time application (year 1) of beef cattle manure, and growing of cover crop cocktails (CCC) for annual pasture, swath grazing, green manure, and green feed. Canola and wheat were respectively grown in years 2 and 3 of the 3-year crop r

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18

Sawchuk, Jaret W., Rene C. Van Acker, and Lyle F. Friesen. "Influence of a Range of Dosages of MCPA, Glyphosate, and Thifensulfuron: Tribenuron (2:1) on Conventional Canola (Brassica napus) and White Bean (Phaseolus vulgaris) Growth and Yield." Weed Technology 20, no. 1 (2006): 184–97. http://dx.doi.org/10.1614/wt-05-064r1.1.

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There is a high potential for inadvertent herbicide injury to crops in western Canada on an annual basis because of the diversity of crops grown in close proximity to each other, although accurate data regarding the annual number of injury incidents is not available. A field study was conducted at two locations in southern Manitoba, Canada, in 2001 and 2002, to investigate the effects of a range of dosages of MCPA ester, glyphosate, and thifensulfuron:tribenuron (2:1) applied to the seedling growth stage of conventional (nongenetically engineered) canola and white bean on subsequent shoot dry

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19

Harker, K. Neil, John T. O'Donovan, Robert E. Blackshaw, Eric N. Johnson, Frederick A. Holm, and George W. Clayton. "Environmental Effects on the Relative Competitive Ability of Canola and Small-Grain Cereals in a Direct-Seeded System." Weed Science 59, no. 3 (2011): 404–15. http://dx.doi.org/10.1614/ws-d-10-00121.1.

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Growing crops that exhibit a high level of competition with weeds increases opportunities to practice integrated weed management and reduce herbicide inputs. The recent development and market dominance of hybrid canola cultivars provides an opportunity to reassess the relative competitive ability of canola cultivars with small-grain cereals. Direct-seeded (no-till) experiments were conducted at five western Canada locations from 2006 to 2008 to compare the competitive ability of canola cultivars vs. small-grain cereals. The relative competitive ability of the species and cultivars was determin

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20

O’Donovan, J. T., R. E. Blackshaw, K. N. Harker, D. W McAndrew, and G. W. Clayton. "Canada thistle (Cirsium arvense) management in canola (Brassica rapa) and barley (Hordem vulgare) rotations under zero tillage." Canadian Journal of Plant Science 81, no. 1 (2001): 183–90. http://dx.doi.org/10.4141/p00-069.

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The effect of in-crop herbicide rate, crop row spacing and seeding rate on Canada thistle [Cirsium arvense (L.) Scop.] management in two cycles of a canola (Brassica rapa L.)/barley (Hordeum vulgare L.) rotation was investigated under zero tillage at Vegreville, Alberta. The entire plot area received pre-harvest glyphosate from 1993 through 1995. In crop, either no herbicides were applied or clopyralid and dicamba/MCPA-K were applied at one-half or full recommended rates to canola and barley, respectively. In most cases, Canada thistle shoot density and dry weight were lower when the herbicide

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21

NOREEN, Sibgha, Shakeela NOOR, Shakeel AHMAD, Fehmeeda BIBI, and Mirza HASANUZZAMAN. "Quantifying Some Physiological and Productivity Indices of Canola (Brassica napus L.) Crop under an Arid Environment." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 44, no. 1 (2016): 272–79. http://dx.doi.org/10.15835/nbha4419993.

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Canola (Brassica napus L.) crop ranks third after soybean and palm among oilseed crops for production of vegetable oil and meal for human and livestock, respectively around the globe. The cultivars of canola crop vary greatly in their yield potential in response to eco-edaphic factors under different production environments. Therefore, research studies were undertaken to evaluate eight cultivars of canola crop â€˜Shiraleeâ€™, â€˜Dunkledâ€™, â€˜Bulbul-98â€™, â€˜Ac-Excelâ€™, â€˜Cycloneâ€™, â€˜Rainbowâ€™, â€˜DGLâ€™ and â€˜Faisal Canolaâ€™ for quantifying some physiological and productivity indice

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22

Karamanos, R. E., and H. H. Janzen. "Crop response to elemental sulfur fertilizers in central Alberta." Canadian Journal of Soil Science 71, no. 2 (1991): 213–25. http://dx.doi.org/10.4141/cjss91-021.

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Sulfur deficiency has become a widespread limitation to crop production in western Canada. A variety of S sources are commercially available to alleviate these deficiencies but not all are equally effective. Three elemental S products (a finely-divided suspension and two elemental S + bentonite) and ammonium sulfate were compared over a 3-yr period in central Alberta. These products were applied to barley and canola at various rates (0–120 kg S ha−1) in a factorial arrangement with various supplemental rates of sulfate-S (0–40 kg ha−1) in two experiments Fertilizers affording effective and rel

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23

Pullins, Emily E., and Robert L. Myers. "Agronomic and economic performance of wheat and canola-based double-crop systems." American Journal of Alternative Agriculture 13, no. 3 (1998): 124–31. http://dx.doi.org/10.1017/s0889189300007803.

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AbstractDouble-cropping provides a method of diversifying the rotation, maximizing production, and increasing the profit potential of a cropping system. We assessed agronomic and economic performance of five alternative crops in comparison to the no-till wheat-soybean double-cropping system prevalent in the southern Corn Belt. Canola has shown potential as a profitable winter crop, but its effects on the subsequent crop in a no-till double-crop system required further study. Amaranth, buckwheat, sunflower, and pearl millet were planted after the harvest of canola or wheat, or after fallow. Alt

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24

O'Donovan, John T., Jeff C. Newman, K. Neil Harker, and George W. Clayton. "Crop Seeding Rate Influences the Performance of Variable Herbicide Rates in a Canola–Barley–Canola Rotation." Weed Technology 18, no. 3 (2004): 733–41. http://dx.doi.org/10.1614/wt-03-168r.

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Glyphosate-resistant canola was seeded at Vegreville, Alberta, in 1997 and 1999 and barley in rotation with the canola in 1998 at three seeding rates. The effects, at each crop seeding rate, of variable glyphosate (canola) and tralkoxydim plus bromoxynil plus MCPA (barley) rates on crop yield, net economic return and seed production by wild oat, wild mustard, and wild buckwheat, and the amount of weed seed in the soil seed bank was determined. Crop seeding rate influenced the response of canola and barley yield and weed seed production to herbicide rate. At the lowest crop seeding rates, yield

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25

Cathcart, R. Jason, A. Keith Topinka, Prem Kharbanda, Ralph Lange, Rong-Cai Yang, and Linda M. Hall. "Rotation length, canola variety and herbicide resistance system affect weed populations and yield." Weed Science 54, no. 4 (2006): 726–34. http://dx.doi.org/10.1614/ws-05-041r1.1.

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A 4-year study was initiated in 1997 to provide canola producers with information on the consequences of various rotational intervals with the use of new disease and herbicide-resistant canola varieties. The study was conducted at three locations in Alberta, Canada (Ellerslie, Strathmore, and Warburg). At each location, four canola rotations were established: continuous canola, and canola seeded in 1 of 2, 3, or 4 years. Canola varieties included the conventional varieties ‘AC Excel’ and ‘Quantum’, the glyphosate-resistant variety ‘Quest’, imidazolinone-resistant ‘45A71’, and a glufosinate-res

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26

Haile, Teketel A., Robert H. Gulden, and Steven J. Shirtliffe. "On-farm seed loss does not differ between windrowed and direct-harvested canola." Canadian Journal of Plant Science 94, no. 4 (2014): 785–89. http://dx.doi.org/10.4141/cjps2013-344.

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Haile, T. A., Gulden, R. H. and Shirtliffe, S. J. 2014. On-farm seed loss does not differ between windrowed and direct-harvested canola. Can. J. Plant Sci. 94: 785–789. Seed loss in canola (Brassica napus) leads to considerable loss of revenue and dispersal of seeds into the soil seedbank. The resulting volunteer canola can create weed problems in subsequent crops and result in further yield loss. The objective of this study was to quantify and compare canola seed loss and seedbank addition from windrowing and direct-harvesting operations on commercial farms in western Canada. A total of 16 di

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Harker, K. N., J. T. O’Donovan, T. K. Turkington, et al. "Canola rotation frequency impacts canola yield and associated pest species." Canadian Journal of Plant Science 95, no. 1 (2015): 9–20. http://dx.doi.org/10.4141/cjps-2014-289.

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Harker, K. N., O’Donovan, J. T., Turkington, T. K., Blackshaw, R. E., Lupwayi, N. Z., Smith, E. G., Johnson, E. N., Gan, Y., Kutcher, H. R., Dosdall, L. M. and Peng, G. 2015. Canola rotation frequency impacts canola yield and associated pest species. Can. J. Plant Sci. 95: 9–20. Canola (Brassica napus L.) production has been steadily increasing in western Canada. Here we determine the effect of canola rotation frequency on canola seed yield, quality and associated pest species. From 2008 to 2013, direct-seeded experiments involving continuous canola and all rotation phases of wheat (Triticum a

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ZELEKE, K. T., D. J. LUCKETT, and R. B. COWLEY. "RESPONSE OF CANOLA (Brassica napus L.) AND MUSTARD (B. juncea L.) TO DIFFERENT WATERING REGIMES." Experimental Agriculture 50, no. 4 (2014): 573–90. http://dx.doi.org/10.1017/s0014479714000064.

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SUMMARYIn arid and semiarid winter crop growing regions of southern Australia, low rainfall, high evaporation, and low soil moisture storage are the limiting factors for crop production. In this region canola (Brassica napus L.) is principally grown in rotation with wheat and pasture species. Some field studies have indicated Indian mustard (Brassica juncea L.) to be more drought tolerant than canola and therefore considered to be better adapted than canola to short season environments. A field experiment was conducted at Wagga Wagga in NSW to determine the effect of two soil moisture regimes

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Pan, W. L., F. L. Young, T. M. Maaz, and D. R. Huggins. "Canola integration into semi-arid wheat cropping systems of the inland Pacific Northwestern USA." Crop and Pasture Science 67, no. 4 (2016): 253. http://dx.doi.org/10.1071/cp15217.

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The inland Pacific Northwestern USA (iPNW) wheat-producing region has a diversity of environments and soils, yet it lacks crop diversity and is one of the few semi-arid wheat-growing regions without significant integration of oilseeds. Four major agroecological zones, primarily characterised by water availability, feature distinctly different fallowed and annually cropped systems, each presenting different challenges and opportunities to integrate winter and spring canola. Although major interests in regional energy crops and rotational diversification spurred feasibility research on iPNW cano

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30

Smith, Elwin G., H. H. Janzen, and Nathaniel K. Newlands. "Energy balances of biodiesel production from soybean and canola in Canada." Canadian Journal of Plant Science 87, no. 4 (2007): 793–801. http://dx.doi.org/10.4141/cjps06067.

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Biodiesel is currently produced in Canada mostly from recycled oils and animal fats. If biodiesel is to supply 5% of diesel usage, a government objective, first-time vegetable, likely from canola and soybean, oil will also be required to provide adequate feedstocks. In this review, we estimate the life cycle energy balances for biodiesel produced from soybean and canola oil under Canadian conditions. The three broad areas of energy inputs were crop production, oil extraction, and transesterification of the vegetable oil into biodiesel. Per unit seed yield, farm production energy inputs for can

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Harker, K. N., J. T. O'Donovan, R. E. Blackshaw, et al. "Effect of agronomic inputs and crop rotation on biodiesel quality and fatty acid profiles of direct-seeded canola." Canadian Journal of Plant Science 93, no. 4 (2013): 577–88. http://dx.doi.org/10.4141/cjps2012-277.

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Harker, K. N., O'Donovan, J. T., Blackshaw, R. E., Hall, L. M., Willenborg, C. J., Kutcher, H. R., Gan, Y., Lafond, G. P., May, W. E., Grant, C. A., Barthet, V., McDonald, T., Wispinski, D. and Hartman, M. 2013. Effect of agronomic inputs and crop rotation on biodiesel quality and fatty acid profiles of direct-seeded canola. Can. J. Plant Sci. 93: 577–588. A field study was conducted at eight sites in western Canada to determine the influence of agronomic inputs on fatty acid profiles and biodiesel quality of canola. Protein and chlorophyll concentration and fatty acid profiles were determined

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32

Harker, K. Neil, John T. O'Donovan, T. Kelly Turkington, et al. "Diverse Rotations and Optimal Cultural Practices Control Wild Oat (Avena fatua)." Weed Science 64, no. 1 (2016): 170–80. http://dx.doi.org/10.1614/ws-d-15-00133.1.

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In western Canada, more money is spent on wild oat herbicides than on any other weed species, and wild oat resistance to herbicides is the most widespread resistance issue. A direct-seeded field experiment was conducted from 2010 to 2014 at eight Canadian sites to determine crop life cycle, crop species, crop seeding rate, crop usage, and herbicide rate combination effects on wild oat management and canola yield. Combining 2× seeding rates of early-cut barley silage with 2× seeding rates of winter cereals and excluding wild oat herbicides for 3 of 5 yr (2011 to 2013) often led to similar wild

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Harker, K. Neil, George W. Clayton, Robert E. Blackshaw, et al. "Glyphosate-resistant spring wheat production system effects on weed communities." Weed Science 53, no. 4 (2005): 451–64. http://dx.doi.org/10.1614/ws-04-105r1.

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Glyphosate-resistant (GR) crops are produced over large areas in North America. A study was conducted at six western Canada research sites to determine seed date and tillage system effects on weed populations in GR spring wheat and canola cropping systems from 2000 to 2003. Four-year wheat–canola–wheat–pea rotations were devised with varying levels of GR crops in the rotation. Weed populations were determined at pre– and post–in-crop herbicide application intervals in 2000 and 2003. Early seeding led to higher and more variable in-crop wild oat and wild buckwheat populations. High frequencies

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Zhang, Xuehua, and W. G. Dilantha Fernando. "Insights into fighting against blackleg disease of Brassica napus in Canada." Crop and Pasture Science 69, no. 1 (2018): 40. http://dx.doi.org/10.1071/cp16401.

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Blackleg disease, caused by the ascomycete fungal pathogen Leptosphaeria maculans, is a devastating disease of canola (Brassica napus) in Australia, Canada and Europe. Although cultural strategies such as crop rotation, fungicide application, and tillage are adopted to control the disease, the most promising disease control strategy is the utilisation of resistant canola varieties. However, field populations of L. maculans display a high evolutionary potential and are able to overcome major resistance genes within a few years, making disease control relying on resistant varieties challenging.

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Smyth, S. J., M. Gusta, K. Belcher, P. W. B. Phillips, and D. Castle. "Changes in Herbicide Use after Adoption of HR Canola in Western Canada." Weed Technology 25, no. 3 (2011): 492–500. http://dx.doi.org/10.1614/wt-d-10-00164.1.

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This article examines the changes in herbicide use in relation to canola production in Western Canada, comparing 1995 and 2006. The commercialization and widespread adoption of herbicide-resistant (HR) canola has changed weed management practices in Western Canada. Before the introduction of HR canola, weeds were controlled by herbicides and tillage as the leading herbicides at that time required tillage to allow for soil incorporation of the herbicide. Much of the tillage associated with HR canola production has been eliminated as 64% of producers are now using zero or minimum tillage as thei

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Irvine, R. B., G. P. Lafond, W. May, et al. "Stubble options for winter wheat in the Black soil zone of western Canada." Canadian Journal of Plant Science 93, no. 2 (2013): 261–70. http://dx.doi.org/10.4141/cjps2012-198.

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Irvine, B. R., Lafond, G. P., May, W., Kutcher, H. R., Clayton, G. W., Harker, K. N., Turkington, T. K. and Beres, B. L. 2013. Stubble options for winter wheat in the Black soil zone of western Canada. Can. J. Plant Sci. 93: 261–270. Winter wheat (Triticum aestivum L.) production has yet to reach its full potential in the Canadian prairies. Alternative stubble types are needed to help overcome the challenge of timely planting of winter wheat in late-maturing canola (Brassica napus L.) fields. A study was conducted in the prairie provinces of Canada to determine ideal stubble types for winter w

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O’Donovan, John T., Jennifer Otani, George W. Clayton, and Yoong K. Soon. "Effect of fall and spring seeding on canola productivity in the Peace River region of northern Alberta." Canadian Journal of Plant Science 85, no. 3 (2005): 641–44. http://dx.doi.org/10.4141/p04-139.

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The feasibility of dormant seeding canola in the fall in the Peace River region of northern Alberta was assessed. Results indicated that there is a significant risk of crop failure with fall seeding, mainly due to poor spring seedling emergence. Where a fall-seeded canola crop established, flowering and seed maturity occurred earlier even though plant densities were lower with fall compared with spring seeding, and seeding date had little or no effect on canola seed yield or quality. Tillage (minimum or zero) or nitrogen rate, source or placement had no consistent effects on canola productivit

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Begna, Sultan, Sangamesh Angadi, Abdel Mesbah, Rangappa Mathada Umesh, and Michael Stamm. "Forage Yield and Quality of Winter Canola–Pea Mixed Cropping System." Sustainability 13, no. 4 (2021): 2122. http://dx.doi.org/10.3390/su13042122.

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Forage crop–dairy farming is an important agro-industry across the world. This system is intensive with high-input forage crops. In the United States (US) Southern Great Plains, the system is based primarily on high-input annual grass-type crops in monocropping approaches and requires diverse low-input broadleaf crops for strengthening its sustainability. Winter canola (Brassica napus L.) and pea (Pisum sativum L.) have the potential to provide forage crop diversity options with high forage yields of high quality. Winter canola and pea in mono- and mixed-cropping approaches at seeding ratios o

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Lemke, R. L., L. Liu, V. S. Baron, S. S. Malhi, and R. E. Farrell. "Effect of crop and residue type on nitrous oxide emissions from rotations in the semi-arid Canadian prairies." Canadian Journal of Soil Science 98, no. 3 (2018): 508–18. http://dx.doi.org/10.1139/cjss-2018-0001.

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Crop rotations on the Canadian prairies commonly include sequences of pulses, oilseeds, and cereals; however, limited information is available regarding the influence that different crop types and sequences may have on direct nitrous oxide (N2O) emissions. A 3 yr field study was conducted on a site near Scott, SK, to compare N2O emissions from selected crop phases of rotations containing pea (Pisum sativum L.), wheat (Triticum aestivum L.), and canola (Brassica napus L.) and to examine the potential influence of these residues on N2O emissions during the subsequent crop phase. Nitrous oxide lo

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Lemerle, Deirdre, David J. Luckett, Eric A. Koetz, Trent Potter, and Hanwen Wu. "Seeding rate and cultivar effects on canola (Brassica napus) competition with volunteer wheat (Triticum aestivum)." Crop and Pasture Science 67, no. 8 (2016): 857. http://dx.doi.org/10.1071/cp16159.

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Canola (Brassica napus L.) is an important rotational crop in the temperate cropping zone of southern Australia. Herbicide-resistant weeds are rapidly spreading and reducing canola grain yield and quality. Crop competition is a useful tool for reducing weed costs and dependence on herbicides, and retarding the spread of herbicide resistance. The potential interaction of canola seeding rate and cultivar for weed management has not been quantified in Australia. A field experiment was conducted in three environments to examine the impact of two contrasting canola cultivars (a low vigour type and

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Baker, Jeanine, and Christopher Preston. "Canola (Brassica napus L.) seedbank declines rapidly in farmer-managed fields in South Australia." Australian Journal of Agricultural Research 59, no. 8 (2008): 780. http://dx.doi.org/10.1071/ar07436.

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Canola is an important crop in southern Australia, where it is used as part of the crop rotation to manage cereal diseases, improve wheat yields, and assist in integrated weed management programs. The potential release of herbicide-tolerant transgenic cultivars into Australia has raised concerns that volunteer canola may itself become an uncontrollable weed. This study examined the persistence of the canola seedbank in farmer-managed fields in 3 geographical areas of the South Australian cropping region for up to 3.5 years after the last canola crop was grown. In total, 66 fields from minimum-

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Smith, E. G., H. R. Kutcher, S. A. Brandt, D. Ulrich, S. S. Malhi, and A. M. Johnston. "The profitability of short-duration canola and pea rotations in western Canada." Canadian Journal of Plant Science 93, no. 5 (2013): 933–40. http://dx.doi.org/10.4141/cjps2013-021.

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Smith, E. G., Kutcher, H. R., Brandt, S. A., Ulrich, D., Malhi, S. S. and Johnston, A. M. 2013. The profitability of short-duration canola and pea rotations in western Canada. Can. J. Plant Sci. 93: 933–940. A long-term field study of canola and pea interval in rotations was used to determine the most profitable canola production systems. The duration between canola crops has been declining with most canola grown more often than the recommended once every 4 yr. Producers could be reducing their long-term profitability if the short-duration canola rotation results in increased disease and lower

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Geddes, Charles M. "Burial Environment Drives Seed Mortality of Kochia (Bassia scoparia), Wild Oat (Avena fatua), and Volunteer Canola (Brassica napus) Irrespective of Crop Species." Plants 10, no. 9 (2021): 1961. http://dx.doi.org/10.3390/plants10091961.

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Models of weed population demography are critical to understanding the long-term viability of management strategies. The driving factors of weed seedbank persistence are often underrepresented in demographic models due to the cumbersome nature of seedbank research. Simplification of weed seedbank dynamics may induce substantial error in model simulations. A soil bioassay was conducted to determine whether growth of different crop species, including wheat (Triticum aestivum L.), canola (Brassica napus L.), and field pea (Pisum sativum L.), differentially impact seed mortality of kochia [Bassia

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Smith, Brendan J., John A. Kirkegaard, and Geoff N. Howe. "Impacts of Brassica break-crops on soil biology and yield of following wheat crops." Australian Journal of Agricultural Research 55, no. 1 (2004): 1. http://dx.doi.org/10.1071/ar03104.

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Biofumigation refers to the allelopathic effects of brassicas on non-desirable soil organisms in a rotation cropping system. These effects are additional to non-hosting of root diseases, responsible for much of the break-crop effect observed in a following cereal crop. We investigated the biofumigation impacts of canola on take-all disease and rhizosphere microorganisms of following wheat crops. The biofumigation potential of the canola was tested by comparing effects of Brassica and non-Brassica break-crops and by using canola varieties with differing levels of root glucosinolates, the precur

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Grant, C. A., A. M. Johnston, and G. W. Clayton. "Sulphur fertilizer and tillage management of canola and wheat in western Canada." Canadian Journal of Plant Science 84, no. 2 (2004): 453–62. http://dx.doi.org/10.4141/p02-083.

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A 3-yr field study in Manitoba, Saskatchewan and Alberta evaluated immediate and residual effects of source, timing and placement of sulphur fertilizers on canola (Brassica napus L.) and wheat (Triticum aestivumL.) under conventional (CT) and reduced tillage (RT). Sulphur fertilization did not increase wheat yield, even when soil sulphate was low. Ammonium sulphate (AS) and ammonium thiosulphate (ATS) increased canola yield in 2 of 3 yr at the Saskatchewan site while elemental S and Tiger 90™ did not. Residual S from AS and ATS increased canola yield on S-deficient soils in the second and thir

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Marcroft, S. J., S. J. Sprague, S. J. Pymer, P. A. Salisbury, and B. J. Howlett. "Crop isolation, not extended rotation length, reduces blackleg (Leptosphaeria maculans) severity of canola (Brassica napus) in south-eastern Australia." Australian Journal of Experimental Agriculture 44, no. 6 (2004): 601. http://dx.doi.org/10.1071/ea03087.

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Due to the large increase of canola production in Australia, current blackleg cultural control recommendations (extended rotation length and isolation distance from canola stubble) are not adhered to by farmers in many canola-producing regions. Canola crops are increasingly being sown in short rotation and, in many instances, adjacent to paddocks containing canola stubble. In this study, the level of disease in commercial canola crops was determined for different rotations and distances from canola stubble. There was a strong relationship between the presence of canola stubble from the previou

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Vykydalová, Lucie, Petra Martínez Barroso, Igor Děkanovský, et al. "The Response of Insects and Weeds within the Crop to Variation in Sowing Density of Canola." Land 13, no. 9 (2024): 1509. http://dx.doi.org/10.3390/land13091509.

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The relationships between weeds and insects in canola stands with different seeding rates are not fully understood. Varying seeding rates in canola crops can create different conditions that affect both weed and insect populations and their interactions. The aim of this work was to determine the response of weeds and insects of selected taxa to different densities of canola stand densities and to clarify the interactions between weeds and insects in canola stands. The field experiment was conducted on a plot located in the cadastral area of the municipality of Pěnčín (Moravia, Czech Republic).

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Cessna, A. J., A. L. Darwent, L. Townley-Smith, K. N. Harker, and K. J. Kirkland. "Residues of glyphosate and its metabolite AMPA in canola seed following preharvest applications." Canadian Journal of Plant Science 80, no. 2 (2000): 425–31. http://dx.doi.org/10.4141/p99-062.

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Residue data for glyphosate and its major metabolite aminomethylphosphonic acid (AMPA) in canola seed following preharvest application of glyphosate were lacking when this 2-yr study was initiated. Residues of glyphosate and AMPA were measured in the seed of canola (Brassica rapa L.) at maturity following preharvest application at rates of 0.45, 0.9 or 1.7 kg acid equivalent ha−1 at four sites in western Canada. Herbicide treatments were applied in early August to mid-September at four stages of crop development, which encompassed seed/pod moisture contents ranging from 74 to 12%. Rate of glyp

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Cunfer, Barry M., G. David Buntin, and Daniel V. Phillips. "Effect of Crop Rotation on Take-all of Wheat in Double-Cropping Systems." Plant Disease 90, no. 9 (2006): 1161–66. http://dx.doi.org/10.1094/pd-90-1161.

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Take-all of wheat (Triticum aestivum), caused by Gaeumannomyces graminis var. tritici, became a serious problem with the widespread adoption of wheat:soybean double-cropping and minimum tillage farming systems in the southeastern United States during the past 30 years. A long-term crop rotation study was initiated in 1994 with 12 double-cropping sequences incorporating wheat, rye, or canola as the fall-planted crop and soybean or grain pearl millet as the summer crop. Cotton and fallow were included in some summer rotations during the last 2 years of the study. The purpose was to identify sust

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Hmielowski, Tracy. "Canola as a winter crop in California." Crops & Soils 50, no. 4 (2017): 35. http://dx.doi.org/10.2134/cs2017.50.0409.

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