Nitrogen

  • Late fall fertilizer and soil testing

    Nitrogen

    Fall fertilizer Fall fertilizer is best applied as close to freeze up as possible to balance two objectives: (1) To allow soil to seal over the band (frozen soil may not seal). (2) To reduce losses due to high microbial activity in warm soils.   The key strategy of fall fertilization is to store nitrogen […]

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  • How late can you top dress fertilizer?

    Nitrogen

    The ideal time for a sulphur top up is any time before flowering, but a top up at early flowering may pay off if plants are showing signs of sulphur deficiency. The ideal time for a nitrogen top up is before the 5-leaf stage of canola, but AAFC research out of Indian Head, Saskatchewan, shows that nitrogen top dress as late as 5-10% flower can still provide a yield benefit.

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  • UCC: 2017 results, 2018 plan

    Nitrogen

    UCC field-scale trials in 2016 and 2017 compared the farmer’s base nitrogen rate with a rate 25% higher. With all site years averaged, adding extra nitrogen did provide a statistically significant yield response, but the increased nitrogen did not always provide an economic return when compared to the base rate.

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  • Timing and depth for fall fertilizer

    Nitrogen

    Fall fertilizer is best applied as close to freeze up as possible to balance two objectives: (1) allow soil to seal over the band and (2) reduce losses due to high microbial activity in warm soils.

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  • Early fall soil tests and fertilizer applications

    Nitrogen

    Some growers are already doing soil tests and making fall fertilizer applications. While this may not be the ideal timing for soil tests of fertilizer applications (closer to freeze up is better), this timing may satisfy a number of other issues, including custom soil-sampler availability, wanting test results before fall application, and checking to see if current soil nutrient levels could explain lower- or higher-than-expected yields this year.

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  • Top dress tips for nitrogen and sulphur

    Nitrogen

    Western Canada has a short growing season. Crops in Western Canada start to take up nutrients early and uptake escalates quickly. For these reasons, the ideal timing for fertilizer application is at seeding. This saves an extra pass over the field and ensures that the expected fertilizer requirement is in place when the crop needs it. But there are times when an in-crop top up of nitrogen or sulphur makes sense.

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  • Fertilizer top dress: 2 questions

    Nitrogen

    We had two questions in the past week about top-dressing fertilizer after seeding.

    1. How early is too early to top dress?
    2. Does adding S stabilize N against losses?

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  • The right nitrogen system for you

    Nitrogen

    Each farm will base its nitrogen application practices on time, labour, equipment and cost. Often losses in efficiency in one area can be compensated for by improvements in another. The “best” nitrogen (N) system is not universal, but will depend on the major limiting factors on each individual farm. Here are key points to consider for the six most common systems.

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  • How to reduce fall N fertilizer losses

    Nitrogen

    The key strategy of fall fertilization is to store nitrogen over the winter in the ammonium form – which is held on clay and organic matter – and is referred to as stabilized N. To keep nitrogen in this stabilized ammonium form and protect it for crop use next year…

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  • Keep up to speed with the UCC

    Nitrogen

    Nitrogen is the theme for 2016. Follow along the UCC journey on Twitter with the #CanolaUCC hashtag and on Instagram at ultimate_canola_challenge.

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  • Nitrogen review: Sources and plant availability

    Nitrogen

    Know your fields and your yield expectations. Soils where N rates have not kept pace with N removal will need to be built back up to increase their productivity. Here is a review of N product options and how they become plant-available…

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  • Still time to take soil samples

    Nitrogen

    The ground is not frozen yet, which means growers and agronomists still have an opportunity to take fall soil samples. This is one of the best times to sample because…

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  • Scout for nutrient deficiency

    Nitrogen

    This diagram from IPNI shows where deficiency symptoms are likely to show up on a plant. Nitrogen is mobile so with N shortage, plants will move N to new parts of the plant. Therefore deficiency will show up first in older leaves.

    This diagram from IPNI shows where deficiency symptoms are likely to show up on a plant. Nitrogen is mobile, so with an N shortage, plants will move N to new parts of the plant. Therefore deficiency will show up first in older leaves.

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  • 3 fertility questions for seeding time

    Nitrogen

    The key with fertility decisions is to apply all of the 4 Rs — right fertilizer source at the right rate, at the right time and in the right place. Missing even one R reduces the yield response from the fertility investment. Make the most of your fertilizer investment. At the CanoLAB fertility station, attendees […]

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  • Dan Orchard on N soil tests

    Nitrogen

    Dan Orchard

    Nitrogen is quite mobile in the soil, and amounts can fluctuate year to year and depth to depth. Although some growers have success by using removal rates and target yields when making N decisions, a soil sample can be a great indicator and a good way to ensure intended rates aren’t too high or too low.

    When determining how much nitrogen to apply, there are a couple of important factors growers should look at….

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