K. Neil Harker
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View article: Cropping system rotation in combination with harvest weed seed control for wild oat (<i>Avena fatua</i>) management
Cropping system rotation in combination with harvest weed seed control for wild oat (<i>Avena fatua</i>) management Open
Wild oat is a significant weed of cropping systems in the Canadian Prairies. Wild oat resistance to herbicides has increased interest in the use of nonchemical management strategies. Harvest weed seed control techniques such as impact mill…
View article: The effects of pre-harvest glyphosate rate and timing on yield and pre-malt quality of malting barley
The effects of pre-harvest glyphosate rate and timing on yield and pre-malt quality of malting barley Open
The production of barley cultivars with malting and brewing quality characteristics is subject to strict grading and technical standards for the end-use market. Environmental and management factors can significantly alter grain quality, an…
View article: Using integrated weed management systems to manage herbicide-resistant weeds in the Canadian Prairies
Using integrated weed management systems to manage herbicide-resistant weeds in the Canadian Prairies Open
Although herbicides have been a dominant and effective weed control strategy for decades in Western Canada, herbicide resistance and the lack of new modes of action have resulted in weed management challenges. Integrated weed management st…
View article: Field testing of a physical impact mill in the Canadian Prairies
Field testing of a physical impact mill in the Canadian Prairies Open
Herbicide resistance in western Canada has increased interest in alternative weed management strategies. Physical impact mills, a form of harvest weed seed control, have been identified as a strategy that may be well suited for Canadian us…
View article: Evaluation of panicle removal methods and crop topping applications as supplemental tools for wild oat (<i>Avena fatua</i>) management
Evaluation of panicle removal methods and crop topping applications as supplemental tools for wild oat (<i>Avena fatua</i>) management Open
Increased frequency and occurrence of herbicide-resistant biotypes heightens the need for alternative wild oat management strategies. This study aimed to exploit the height differential between wild oat and crops by targeting wild oat betw…
View article: Bacterial Communities of the Canola Rhizosphere: Network Analysis Reveals a Core Bacterium Shaping Microbial Interactions
Bacterial Communities of the Canola Rhizosphere: Network Analysis Reveals a Core Bacterium Shaping Microbial Interactions Open
The rhizosphere hosts a complex web of prokaryotes interacting with one another that may modulate crucial functions related to plant growth and health. Identifying the key factors structuring the prokaryotic community of the plant rhizosph…
View article: Effects of plant growth regulator applications on malting barley in western Canada
Effects of plant growth regulator applications on malting barley in western Canada Open
Malting barley is important in western Canada, yet many malting cultivars do not meet malt quality standards, in part due to lodging. Lodging can decrease barley yield and quality thereby reducing the acceptability for malting. In other co…
View article: Canola Root–Associated Microbiomes in the Canadian Prairies
Canola Root–Associated Microbiomes in the Canadian Prairies Open
Canola is one of the most economically important crops in Canada, and the root and rhizosphere microbiomes of a canola plant likely impact its growth and nutrient uptake. The aim of this study was to determine whether canola has a core roo…
View article: The profitability of diverse crop rotations and other cultural methods that reduce wild oat (<i>Avena fatua</i>)
The profitability of diverse crop rotations and other cultural methods that reduce wild oat (<i>Avena fatua</i>) Open
With the increasing resistance of wild oat (Avena fatua L.) to herbicides, there is a need to evaluate the potential of alternative cropping systems based on integrated weed management principles. A 5-yr field study at eight sites across C…
View article: Attempts to rescue yield loss in continuous canola with agronomic inputs
Attempts to rescue yield loss in continuous canola with agronomic inputs Open
Recent canola acreage and production in western Canada have reached record high levels. Field experiments were conducted from 2014 to 2016 on land previously seeded to continuous canola for 6 yr at three Canadian Prairie sites. We determin…
View article: Enhanced nitrogen management strategies for winter wheat production in the Canadian prairies
Enhanced nitrogen management strategies for winter wheat production in the Canadian prairies Open
To address knowledge gaps around enhanced efficiency urea fertilizer efficacy for nitrogen (N) management, a study was designed to improve integrated nutrient management systems for western Canadian winter wheat producers. Three factors we…
View article: Weed seed shatter in spring wheat in Alberta
Weed seed shatter in spring wheat in Alberta Open
The efficacy of harvest weed seed control depends on the extent of seed shatter of targeted weeds. Seed shatter of nine weed species, namely wild oat (Avena fatua L.), green foxtail [Setaria viridis (L.) P. Beauv.], wild mustard (Sinapis a…
View article: Effect of preceding crop and nitrogen application on malting barley quality
Effect of preceding crop and nitrogen application on malting barley quality Open
As legume crops fix nitrogen (N) from the atmosphere, there is concern that soil residual N from legumes grown in rotation with malting barley may result in unacceptably high protein content and have negative effects on quality. However, l…
View article: Another view
Another view Open
Weed resistance to herbicides occurs when herbicides are overused and can be mitigated by reducing their use. Consensus on herbicide resistance management strategies is problematic given strong industrial profit motive links in the weed sc…
View article: Effect of seeding date and rate on malting barley (<i></i>Hordeum vulgare<i></i> L.) quality
Effect of seeding date and rate on malting barley (<i></i>Hordeum vulgare<i></i> L.) quality Open
A field study conducted over three years in western Canada investigated the effects of seeding date and rate on malting quality of AC Metcalfe barley. Seeding date had little or no effect on quality. Increasing the seeding rate improved se…
View article: Influence of production systems on return and risk from malting barley production in western Canada
Influence of production systems on return and risk from malting barley production in western Canada Open
Profitable malting barley (Hordeum vulgare L.) production systems are required to reverse the decline in area seeded to malting barley in western Canada. Systems that could increase the profitability of growing malting barley considered th…
View article: Winter Wheat Yields Are Increased by Seed Treatment and Fall‐Applied Fungicide
Winter Wheat Yields Are Increased by Seed Treatment and Fall‐Applied Fungicide Open
Poor stand establishment resulting in lower yield is a major constraint to expanding winter wheat ( Triticum aestivum L.) land area across the semiarid temperate regions of the northern Great Plains. We conducted a direct‐seeded study at n…
View article: Winter Wheat Cropping System Response to Seed Treatments, Seed Size, and Sowing Density
Winter Wheat Cropping System Response to Seed Treatments, Seed Size, and Sowing Density Open
Poor stand establishment resulting in lower yield is a major constraint to expanding winter wheat ( Triticum aestivum L.) across western Canada. To address this issue, we conducted a study totaling 26 site‐years over three growing seasons …