After a week off for Victoria Day (and host Lyndsey Smith busy caring for lambs), we’re back!
This episode of The Agronomists — brought to you by the Pest & Predators podcast, RealAg Radio, and ADAMA Canada — features Dr. Dave Hooker, associate professor at the University of Guelph-Ridgetown, and Laura Schmidt, production specialist with the Manitoba Soybean and Pulse Growers.
The trio discusses early soybean (and maybe even a little corn) emergence questions.
SUMMARY:
- Are we allowed to panic on June 1, as parts of Manitoba just get going with seeding?
- Stand assessment is super critical
- Well sown is half grown
- The dreaded replant…it didn’t even take Dr. Dave 15 minutes to get into it! But hey, it’s a key point. Consider yield potential.
- Net returns vs. final plant stand. Check out the fascinating graph at the 15 minute mark
- In Manitoba there are tonnes of soybeans that go in with the planter, but there are a lot of acres that go in the ground with drills, too
- Can we float soybeans? Sometimes you may be better to actually choose a different crop. Getting that seed in the ground is incredibly important
- Parts of central Manitoba are really concerned as to whether it is too late to put in soybeans. Don’t lose hope yet, says Schmidt
CLIP 1: Soybean School: Assessing stand establishment 30 days after emergence
- Schmidt brought props! She apologizes for them…but honestly, we’re here for it
- When do we switch to 7.5 inch rows? Anytime after mid-June, likely. If you do wider rows after that, there’s a good chance you’ll see a significant yield penalty.
- As we push soybeans later…should we switch to a different variety? How do you make that call? What goes into making that decision? Spoiler alert: soybeans are quite different than corn in this situation.
- There’s some varieties that branch much better than other varieties, so watch out on your row spacing
CLIP 2: Soybean School West: Checking for root rots and seedling diseases
- Seed treatments are good for 2-3 weeks
- We have a root rot for every temperature
- We really want to protect those seedlings as much as we can
- Chocolate spot may sound delicious…but it’s not
- There are plenty of fields that are severely impacted by root rots
- If you’re a pulse grower, you’ve likely heard of aphanomyces. Guess what, your soybeans are resistant!
- When is the ideal time to roll your soybeans? This significantly depends on the moisture conditions
- Watch for breakage with post-emergent rolling
- Address the doubles and triples, but don’t obsess about them
- Developmental delays are way more important
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