Economic Optimum

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Guy P. Lafond - One of the best experts on this subject based on the ideXlab platform.

  • legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat canola cropping sequence in western canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, Robert E. Blackshaw, Eric N. Johnson, Yantai Gan, John T Odonovan, Neil K Harker, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

  • Legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O'donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

Mervin St. Luce - One of the best experts on this subject based on the ideXlab platform.

  • legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat canola cropping sequence in western canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, Robert E. Blackshaw, Eric N. Johnson, Yantai Gan, John T Odonovan, Neil K Harker, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

  • Legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O'donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

Cynthia A. Grant - One of the best experts on this subject based on the ideXlab platform.

  • legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat canola cropping sequence in western canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, Robert E. Blackshaw, Eric N. Johnson, Yantai Gan, John T Odonovan, Neil K Harker, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

  • Legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O'donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

Bernie J. Zebarth - One of the best experts on this subject based on the ideXlab platform.

  • legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat canola cropping sequence in western canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, Robert E. Blackshaw, Eric N. Johnson, Yantai Gan, John T Odonovan, Neil K Harker, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

  • Legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O'donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

Noura Ziadi - One of the best experts on this subject based on the ideXlab platform.

  • legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat canola cropping sequence in western canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, Robert E. Blackshaw, Eric N. Johnson, Yantai Gan, John T Odonovan, Neil K Harker, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.

  • Legumes can reduce Economic Optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada
    Field Crops Research, 2015
    Co-Authors: Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O'donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, Guy P. Lafond
    Abstract:

    Abstract Inclusion of legumes in crop rotations is a sustainable approach to reducing nitrogen (N) fertilizer requirements and increasing subsequent crop yields. However, the magnitude of the benefit will depend on the specific legume, the subsequent crop and site-specific conditions. This study compared the effects of preceding legumes and non-legumes on yields and Economic Optimum N rates (EONR) in a Hard Red Spring wheat ( Triticum aestivum L.)–hybrid canola ( Brassica napus L.) cropping sequence. Field pea ( Pisum sativum L.), lentil ( Lens culinaris Medik), faba bean ( Vicia faba L.; faba bean-seed), canola and wheat grown for grain, and faba bean grown as green manure (faba bean-GRM) were the preceding crops and were direct-seeded at six locations in western Canada in 2010. Wheat was seeded in 2011 and canola in 2012, with N fertilizer applied at 0, 30, 60, 90 and 120 kg N ha −1 in each year. Averaged across preceding crops, N application increased crop yields at all sites. Wheat grain yield was greater, with a corresponding lower EONR, following legumes than non-legumes due in part to increased N availability. Greater non-N benefits to wheat following legumes than non-legumes were also evident at all but one site, with non-N benefits being lowest for preceding wheat. While preceding legumes had no effect on canola seed yield across sites, EONR for canola were >50% lower for legume-wheat than non-legume-wheat rotations. Among the legumes, growing faba bean-GRM, field pea and lentil were most likely to increase crop yields and reduce EONR as compared to faba bean-seed. Overall, growing legumes for seed before a wheat–canola cropping sequence in conventional cereal cropping systems can increase crop yields, reduce EONR and improve the long-term sustainability of cereal cropping systems.