Google Translate Disclaimer

A number of pages on the Government of Saskatchewan`s web site have been professionally translated in French. These translations are identified by a yellow text box that resembles the link below and can be found in the right hand rail of the page. The home page for French-language content on this site can be found here:

Renseignements en Français

Where an official translation is not available, Google™ Translate can be used. Google™ Translate is a free online language translation service that can translate text and web pages into different languages. Translations are made available to increase access to Government of Saskatchewan content for populations whose first language is not English.

The results of software-based translation do not approach the fluency of a native speaker or possess the skill of a professional translator. The translation should not be considered exact, and may include incorrect or offensive language Government of Saskatchewan does not warrant the accuracy, reliability or timeliness of any information translated by this system. Some files or items cannot be translated, including graphs, photos, and other file formats such as portable document formats (PDFs).

Any person or entities that rely on information obtained from the system does so at his or her own risk. Government of Saskatchewan is not responsible for any damage or issues that may possibly result from using translated website content. If you have any questions about Google™ Translate, please visit: Google™ Translate FAQs.

While scouting your canola fields, be on the lookout for sulphur deficiencies, too!

Crop Production News 2018 - Issue 2 

By Ken Panchuk, PAg, Provincial Specialist Soils

June 2018

Leaves with sulphur deficiency
Cupping of leaves and/or yellow spots on the first true leaves
are symptoms of sulphur deficiency. Photo source International
Plant Nutrition Institute (IPNI).
It is widely known that sulphur is required for healthy stands and optimum yield of canola. However, sometimes sulphur application on canola is missed for one of many reasons, such as crop switching (a change in rotation at the last minute) during seeding. Post seeding application of sulphur is a viable option to correct sulphur deficiencies, but timing is important.

Sulphur is not mobile in plants, so a constant supply of sulphur is needed from shortly after emergence to the completion of seed filling. A shortage of sulphur at any stage of growth can result in reduced yield. When scouting fields, sulphur deficiency symptoms will appear in patches and seldom in the entire field. If symptoms appear in patches, take action by broadcasting some ammonium sulphate as soon as possible.

Sulphur deficiency symptoms on the first true leaves can be cupping upward of the leaves and/or yellow spotting. Other symptoms are:

  • Cupping upward of the leaves with possible reddening of the underside of the leaf margins;
  • Interveinal yellowing of the newest leaves;
  • Spindly plants;
  • Smaller pale yellow flowers; and
  • Poor pod development with poor seed filling resulting in delayed maturity.

Research has shown that ammonium sulphate can be applied up to the early flower stage to rescue yield. However, the earlier the application is made, the better the chance of recovering full yield potential. For more information, see Sulphur Fertilization in Crop Production.

We need your feedback to improve Help us improve