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Questions of the Week
July 24, 2024
Sulphur
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How much fertilizer does canola need?
December 16, 2020
Canola generally needs nitrogen, phosphorus and sulphur fertilizer each year. A small percentage of fields will also benefit from a potassium application. The following article suggests what canola needs and what soil and crop residue could provide. The rest will come from fertilizer…
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Signs of sulphur shortages
July 10, 2019
We heard two reports this week of sulphur deficiency symptoms. One situation was the result of other early-season pressures – delayed emergence and flea beetles – and was solved as the plants grew bigger…
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How late can you top dress fertilizer?
July 5, 2018
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…
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Top dress tips for nitrogen and sulphur
June 7, 2017
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…
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Fertilizer top dress: 2 questions
May 31, 2017
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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Light-coloured petals: Sulphur or something else?
July 13, 2016
Canola Watch had a question this week about light-coloured petals and what can cause them. The field in question had large unruly patches of light-coloured flowers, indicating it was likely related to soil. Sulphur deficiency seems the most obvious but other causes must be ruled out first…
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When you see something new
June 23, 2016
Before spending money on a treatment, growers will need to identify the cause. The Canola Diagnostic Tool can help you work through the possibilities. A few localized tests can also help with the diagnosis…
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Need to know: Sulphur (S)
April 12, 2016
Growers understand the need for S in canola, but more frequent production of canola and higher yields have been drawing down soil levels. Soil fertility expert Ross McKenzie estimates that at least 40% of soils across Western Canada are S deficient…