KEY PRACTICE: Apply at least 10 lb./ac. of sulphur to every canola acre, every year, no matter the soil test result. Increase if necessary to meet soil test recommendations.
KEY RESEARCH: C.A. Grant, S.S. Mahil and R.E. Karamanos. “Sulfur management for rapeseed,” Field Crops Research 128 (2012) 119–128 reviews all key research.
Canola growers can experience substantial decreases in yield due to sulphur deficiency. The abstract to the Grant, Malhi and Karamanos review cited above begins with this: “(Canola) has a high concentration of sulphur in its tissue and seed and a particularly high demand for sulphur relative to its yield potential. Therefore, effective sulphur management is an important part of (canola) production. Sulphur deficiencies are becoming increasingly prevalent due to higher crop yields, decreasing aerial deposition of sulphur and decreasing mineralization of sulphur from soil organic matter.”
The general recommendation for Western Canada is to apply at least 10 lb./ac. of sulphur to every canola acre, every year, no matter the soil test result. Apply higher rates when necessary to meet soil test recommendations, especially when soil test results are low in sulphur.Open the PDF to read the entire research summary from the 2014 Science Issue of Canola Digest
Visit the Canola Research Hub website to search the database of grower funded research