This map shows accumulated precipitation across the Prairies for the 30 days from April 6 to May 5. Topsoil moisture is generally good across the Prairies. Moist soil is more likely to get picked up by seeding and spraying equipment and carried field to field, spreading clubroot as well as other diseases and weed seeds and whatever else might be in that soil.
Here is a PDF of the map for a bigger view: Accumlated precip 30 days
You can create your own current and historic weather maps at this AAFC site.