Updated Cereal/Oilseed/Pulse Maps for Yield, Acreage and Seeding Date Now Available

Manitoba Agriculture’s Crop Industry Branch and MASC has updated and posted yield, acreage and seeding date maps for cereal, oilseed and pulse crops at https://www.masc.mb.ca/masc.nsf/mmpp_index.html

The maps can be found at the link above under the heading “Thematic Crop Maps“‎. Time frame in most cases is 2006 to 2015 (10 year), but 2011 to 2015 is also available for soybean, feed wheat and corn to reflect the acreage changes that occurred in the past 5 years.

Many thanks to Doug Wilcox‎ from MASC for the database, and Les Mitchell and Natalie Azure from the Crop Industry Branch who developed and created the maps for this project.


Have a follow-up question?

Should I Be Cancelling My Soybean Seed?

Answer (provided by Dennis Lange, MAFRI Farm Production Advisor at Altona):

 Before you considering cancelling you soybean seed, here are a few things to consider:

  1. Variety Choice:  Is the variety suited for your growing region? If you chose a variety based on maturity ( found in Seed Manitoba 2013) and you are planting in May, you should reach  maturity  before reaching a killing frost, based on a normal growing season.
  2. Soil temperature: Soybeans like warm soils to germinate and grow. The warmer the soil, the quicker the beans come out of the ground.  For example, with soil temperatures at 10°C soybeans  take 14-17 days to emerge  vs. 7-10 days when soil temperatures are at 15°C.
  3. Seeding Date: Know the seeding deadlines in your growing region. If in Soybean Area 1, full coverage deadline is June 6. If in Soybean Areas 2, 3 or new crop insurance test area, your deadline is May 30. For further information contact MASC to determine which area you are in. Table 1: Soybean Yields by Seeding Date (2008-2012)

Using MASC seeding information from 2008-2012, yield potential differs depending on seeding date by Risk area.  

  • Risk Area 12 (includes Red River Valley) – highest yield potential was seeded during the 2nd week of May. 
  • In Western Manitoba:
  • Risk Area 1 – best yields when seeded in the 4th week of May, followed by week 3
  • Risk Area 2 – best yields in the 2nd week of May, with weeks 3 and 4 equal
  • Risk Area 3 – best yields in the 3rd week of May, followed by the 4th and 2nd weeks
  • Risk Area 4 – best yields in the 2nd week of May, with yields dropping in 4th week
  • Risk area 15 – similar to Risk Area 4 trends with best week the 2nd and yields dropping in the 4th week of May 

 In conclusion, if you are planting a variety that is suited for your growing region and planting in May, you should be confident that growing soybeans this year is still the right decision. Beans like warm soil so typically, planting in the 2nd or 3rd week of May when soil temperatures are warmer, allows the beans to get out of the ground quicker. But, waiting until June to plant, increases the risk of fall frost damage and yield reductions.

Have a follow-up question?

The Month of May is A Good Time to Seed Canola

Question: When is the ‘Right’ Time to Seed Canola?

Answer (submitted by Anastasia Kubinec, MAFRI Oilseed Crop Specialist):

The ‘right’ date to seed canola will change every year in Manitoba.  Earlier works in some years, but not all. 

To set your canola crop up for a good start in all years, fields should be monitored to assess when machinery can successfully get across and when soil temperatures are warm for quick seedling establishment (average 5C or higher). Also, planning seeding dates to avoid the last spring frost, or have canola seedlings at a stage where they can handle a frost event better (3 to 4 leaf canola is less susceptible than at the cotyledon stage).

Looking at the Manitoba Agricultural Services Corporation (www.masc.mb.ca) data on canola seeding date and yield (2000-12), most of May looks pretty good as a seeding date. For the first three weeks (May 1-22), canola yields regionally are above 100%.  In the fourth week of May (May 23-31), yields are around 95% or higher (see  Table 1: Manitoba Canola Yields by Seeding Date (2000-2012)). 

Looking at the acres seeded, it shows Manitoba farmers typically do seed the majority of the canola crop in May (64 – 89% depending on region). Figure 1: Manitoba Canola Acres Seeded by Week (2000-2012).  So for the most part, Manitoba farmers have the timelines for the ‘best’ seeding dates figured out pretty well (if the weather co-operates).  But please remember the other factors that will boost establishment and yields – not seeding too fast, not putting seeds too deep (or shallow) and proper fertilizer placement and amounts. Even though the entire month of May looks good for seeding canola, we usually only get one chance to do it right!  




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