Search Results - "O’Donovan, J.T."

Phosphorus release during decomposition of crop residues under conventional and zero tillage by Lupwayi, N.Z., Clayton, G.W., O’Donovan, J.T., Harker, K.N., Turkington, T.K., Soon, Y.K.

“…Field experiments were conducted at Fort Vermilion (58°23′N 116°02′W), Alberta, to determine phosphorus (P) release patterns from red clover ( Trifolium…”
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Soil microbial response to herbicides applied to glyphosate-resistant canola by Lupwayi, N.Z., Harker, K.N., Clayton, G.W., O’Donovan, J.T., Blackshaw, R.E.

“…Adoption of glyphosate-resistant canola ( Brassica napus L.) has increased glyphosate applications to this crop, and concerns have been raised about unintended…”
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Integrated approaches to managing weeds in spring-sown crops in western Canada by O’Donovan, J.T., Blackshaw, R.E., Harker, K.N., Clayton, G.W., Moyer, J.R., Dosdall, L.M., Maurice, D.C., Turkington, T.K.

“…In western Canada, the move to integrated weed management (IWM) with reduced dependence on herbicides is being driven by low crop prices, weed resistance to…”
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Influence of production systems on return and risk from malting barley production in western Canada by Smith, E.G, Turkington, T.K, O'Donovan, J.T, Edney, M.J, Juskiw, P.E, McKenzie, R.H, Harker, K.N, Clayton, G.W, Xi, K, May, W.E, Irvine, R.B, Brandt, S, Johnson, E.N, Perkovic, S

“…Profitable malting barley (Hordeum vulgare L.) production systems are required to reverse the decline in area seeded to malting barley in western Canada…”
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Soil microbial biomass, functional diversity and enzyme activity in glyphosate-resistant wheat–canola rotations under low-disturbance direct seeding and conventional tillage by Lupwayi, N.Z., Hanson, K.G., Harker, K.N., Clayton, G.W., Blackshaw, R.E., O’Donovan, J.T., Johnson, E.N., Gan, Y., Irvine, R.B., Monreal, M.A.

“…As glyphosate-resistant (GR) crops are becoming common in agro-ecosystems, their effects on non-target soil organisms need to be monitored. We evaluated soil…”
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Effects of plant growth regulator applications on malting barley in western Canada by Tidemann, B.D, O’Donovan, J.T, Izydorczyk, M, Turkington, T.K, Oatway, L, Beres, B, Mohr, R, May, W.E, Harker, K.N, Johnson, E.N, de Gooijer, H

“…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…”
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Enhanced nitrogen management strategies for winter wheat production in the Canadian prairies by Beres, B.L, Graf, R.J, Irvine, R.B, O’Donovan, J.T, Harker, K.N, Johnson, E.N, Brandt, S, Hao, X, Thomas, B.W, Turkington, T.K, Stevenson, F.C

“…To address knowledge gaps around enhanced efficiency urea fertilizer efficacy for nitrogen (N) management, a study was designed to improve integrated nutrient…”
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Effect of preceding crop and nitrogen application on malting barley quality by O’Donovan, J.T, Izydorczyk, M.S, Tidemann, B, Edney, M.J, Turkington, T.K, Grant, C.A, Harker, K.N, Gan, Y

“…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…”
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Correction: Enhanced nitrogen management strategies for winter wheat production in the Canadian prairies by Beres, B.L, Graf, R.J, Irvine, R.B, O’Donovan, J.T, Harker, K.N, Johnson, E.N, Brandt, S, Hao, X, Thomas, B.W, Turkington, T.K, Stevenson, F.C

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Impact of seedbed utilization and fungicide application on severity of net blotch [Pyrenophora teres] and production of barley by Turkington, T.K, Kutcher, H.R, Clayton, G.W, O'Donovan, J.T, Johnston, A.M, Harker, K.N, Xi, K, Stevenson, F.C

“…Limited information is available regarding the impact of seed placement and row spacing, and their interaction with fungicides, on leaf diseases and agronomic…”
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Attempts to rescue yield loss in continuous canola with agronomic inputs by Harker, K.N, Hartman, M.D, Tidemann, B.D, O’Donovan, J.T, Turkington, T.K, Lupwayi, N.Z, Smith, E.G, Mohr, R.M

“…Recent canola acreage and production in western Canada have reached record high levels. Field experiments were conducted from 2014 to 2016 on land previously…”
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Seeding Rate, Nitrogen Rate, and Cultivar Effects on Malting Barley Production by O'Donovan, J.T, Turkington, T.K, Edney, M.J, Clayton, G.W, McKenzie, R.H, Juskiw, P.E, Lafond, G.P, Grant, C.A, Brandt, S, Harker, K.N, Johnson, E.N, May, W.E

“…The malting barley (Hordeum vulgare L.) industry is often challenged by the availability of sufficient volume and quality to meet demand. Our objective was to…”
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Weed-Competitive Ability of Canada Western Red Spring Wheat Cultivars Grown under Organic Management by Mason, H.E, Navabi, A, Frick, B.L, O'Donovan, J.T, Spaner, D.M

“…Competition from weeds can reduce grain yields in both conventional and organic systems. Plant height, tillering, and elevated photosynthetically active…”
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Canola Response to ESN and Urea in a Four-Year No-Till Cropping System by Blackshaw, R.E, Hao, X, Brandt, R.N, Clayton, G.W, Harker, K.N, O'Donovan, J.T, Johnson, E.N, Vera, C.L

“…Nitrogen fertilizer is a major input cost in canola (Brassica napus L.) production and farmers are interested in improving N use efficiencies. A multi-site…”
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Quackgrass (Elytrigia repens) Interference in Canola (Brassica campestris) by O'Donovan, John T.

“…The effects of quackgrass shoot populations shortly after emergence, and dry weight at harvest on yield of canola were determined in four field experiments…”
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Canola growth, production, and quality are influenced by seed size and seeding rate by Harker, K.N, O'Donovan, J.T, Smith, E.G, Johnson, E.N, Peng, G, Willenborg, C.J, Gulden, R.H, Mohr, R.M, Gill, K.S, Weber, J.D, Issah, G

“…Canola (Brassica napus L.) is the most widespread profitable cash crop in Canada. In 2014 and 2015, direct-seeded experiments were conducted in 16 western…”
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Ongoing Development of Integrated Weed Management Systems on the Canadian Prairies by Blackshaw, Robert E., Harker, K. Neil, O'Donovan, John T., Beckie, Hugh J., Smith, E. G.

“…Herbicides are very effective tools to control weeds but there has been an overreliance on their use at the expense of other useful methods of weed management…”
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Effect of seeding date and rate on malting barley (Hordeum vulgare L.) quality by O'Donovan, J.T, Edney, M.J, Izydorczyk, M.S, Turkington, T.K, Juskiw, P.E, McKenzie, R.H, Grant, C.A, Harker, K.N, May, W.E, Johnson, E.N, Smith, E.G, Clayton, G.W

“…A western Canada field study investigated the effects of seeding date and rate on malting barley quality. Seeding date had little effect on quality. Increasing…”
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Effect of Nitrogen Rate and Placement and Seeding Rate on Barley Productivity and Wild Oat Fecundity in a Zero Tillage System by O'Donovan, J.T, Clayton, G.W, Grant, C.A, Harker, K.N, Turkington, T.K, Lupwayi, N.Z

“…Placing N in the form of urea with the seed allows seeding and fertilizer application to be accomplished simultaneously with minimal soil disturbance. However,…”
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Barley Productivity Response to Polymer-Coated Urea in a No-Till Production System by Blackshaw, R.E, Hao, X, Harker, K.N, O'Donovan, J.T, Johnson, E.N, Vera, C.L

“…Farmers are interested in more cost-efficient and environmentally sound fertilization programs in field crops. A multi-site study on the Canadian prairies was…”
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