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.

Boron application to canola at early flowering

By: Gary Kruger, PAg, Irrigation Agrologist, Crops and Irrigation Branch

Yields for canola have risen to new heights in recent growing seasons, but growers are interested in pushing them even higher. Growers are also interested in whether boron application will further boost canola yields. Research in the 1990s and 2000s illustrated limited potential, but new varieties may have greater requirements and an ability to respond to an increased supply of boron. Sensitive crops such as alfalfa and canola have demonstrated visual symptoms suspected to be deficiencies on numerous occasions on susceptible soils. Many research agencies have conducted field testing with both liquid and granular boron forms applied to suspect soils using a variety of methods and timings, but few have demonstrated yield responses. 

Normalized difference vegetation index (NDVI) image from an irrigated canola field
Normalized difference vegetation index (NDVI) image
taken from an irrigated canola field on August 16, 2016,
detects where boron was applied. The boron application
corresponds with an approximately 5 bu/ac higher seed
yield as determined with a weigh wagon.
(Image courtesy Kris Ewen, Farmer's Edge, Outlook, SK)
Boron is a soluble plant nutrient that is mobile in the soil. Primary sources available in the soil include organic matter and clay content. Flushing of boron from the soil profile by precipitation can reduce the supply of boron to canola. Capillary rise of boron with salts from deeper in the soil will contribute to improved boron supply from the soil to canola under dry conditions. A critical level for the boron soil test has not proven successful in separating responsive from unresponsive sites. 

When rainfall is more frequent, less irrigation is required to grow the crop. The supply of boron to crops with irrigation water is about 0.05 lb boron per acre inch applied. When drier conditions return to Saskatchewan, the contribution of boron dissolved in irrigation water will increase proportionately as the rate of irrigation increases. 

Yield response of canola to foliar boron during the 2016 growing season was 4 to 6 bu/ac on two of the three Agriculture Demonstration of Practices and Technologies (ADOPT) sites, which were conducted in cooperation with the Irrigation Crop Diversification Corporation (ICDC). The impact on canola growth was detected by NDVI imagery taken in mid-August on one of the fields, as shown in Figure 1. The area corresponding with boron application to canola at Riverhurst is the darker green polygon along the left hand side of the NDVI image. 

Additional projects conducted during 2017 will evaluate whether the plant tissue boron content at early rosette stage is useful as a guide for predicting the likelihood of canola response to foliar boron application.

For more information, contact Gary Kruger, Irrigation Agrologist, at 306-867-5524 or

We need your feedback to improve Help us improve