By Thom Weir, Senior Precision Agronomist

For part four of Back to Basics Soil Fertility focus on the “secondary” nutrient: Sulphur.  For much of the world and up until the 1980’s, Sulphur (S) or (Sulfur for those of you south of the 49th parallel) has been considered of secondary interest as compared to Nitrogen, Phosphate and Potassium.  However, as organic matter depleted, and canola acres grew – a crop that is a heavy user of Sulphur– deficiencies became more common.  That brings us to today where there are very few canola crops grown in western Canada without the application of some sort of Sulphur fertilizers. In fact, in the productive black soil zones and irrigated land, Sulphur is routinely applied to all crops…

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