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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…
Sulphur
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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.……
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Canola has a high demand for sulphur. Because of high sulphur variability across most fields, the common recommendation is to apply 10-15 lb./ac. of sulphur when soil test results show adequate levels and 20-25 lb./ac., or more, when tests show deficient levels. Read more for product options and when to use them… -
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… -
Two potential top dress situations are showing up in canola fields across the Prairies this week: 1. Excess moisture and poor nutrient availability. 2. Crop runs out of nutrients… -
Top dressing fertilizer usually occurs after emergence, often as a response to increased yield potential or as a remedy for noticeable deficiency symptoms. However, growers are looking at top dressing this year as a logistical aid in getting the crop seeded faster. Here are some agronomy messages to help in your decision making… -
The 4 Rs, as described by the Canadian Fertilizer Institute and other crop nutrition organizations, are the right fertilizer source at the right rate, at the right time and in the right place. The 4 Rs will help you make the most of your fertilizer investment. Here are the three basics of canola crop nutrition…
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For growers who want to use elemental sulphur, fall is the time to apply it… -
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…
