Take fall samples when soil temperatures drop below 10°C, or cooler. Because microbial processes in the soil slow down as temperatures cool, sampling late in the fall will provide a close representation of nutrient levels at seeding next spring. The cooler the better when sampling, but you want to make sure you can still get the probe down 24”. Submit…
Fertility
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Sulphur and nitrogen deficiencies are showing up in some canola crops. The crop may not have received enough fertilizer to begin with, especially if this year’s rates did not compensate for high yields and high removal last year. Excess moisture may have added to nutrient losses. Flowering is not an ideal time to top dress, and applications any time after…
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Canola in fields with excess moisture will often show various signs of stress, including yellowing, purpling, stunted growth — or all of three. Excess moisture creates two problems for crop nutrition: (1) It can remove nutrient from the soil. And (2) it can “drown” roots and make it impossible for them to take up nutrients — even if nutrients are…
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Canola crops side by side can have different risk factors, and often do not require the same crop management for nutrients, weeds, insects and disease. Crop rotation, fertilizer rates, plant population, stand uniformity and crop stage are a few factors that can influence whether one crop needs a treatment while the other right beside may not…
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We had a “follow up question” to last week's article "Hail damage: Economic loss depends on cro stage." The grower was asking about foliar nutrition after a hail storm. He had 2” of rain a week after a hailstorm and he feels that a foliar application could be worthwhile. The hail hit canola at the 5-6 leaf stage with a…
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Canola needs a little bit of boron, and most Canadian Prairie soils have enough to meet this demand…