Volume 39, Number 1 | JANUARY 7, 2013
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PRACTICAL PRODUCTION TIPS FOR THE PRAIRIE FARMER
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Row planters versus air drills There are some benefits to gain from row planters, but your decision to buy one will depend on row spacing and seeding rates BY LISA GUENTHER
R
ow planters offer some benefits over air drills when seeding soybeans, according to research done in Ontario and Manitoba. But those advantages won’t add up to a new equipment purchase for every farmer. Horst Bohner is a soybean specialist with Ontario’s Ministry of Agriculture, Food and Rural Affairs. From 2008 through 2010, Bohner and his colleagues compared soybeans seeded with a 1560 John Deere no-till drill to soybeans seeded with a Kearney 15-inch vacuum planter. Row spacing was set at 7.5 inches and 15 inches for the drill, and 15 inches for the planter. Seeding rates ranged from 100,000 seeds per acre to 300,000 seeds per acre. “The long and the short of it, there was a small but real benefit in terms of yield. And I think where that comes from is a little bit of a better plant stand, partially. And we think that the reason we’re getting a larger percentage of plants compared to what we’re seeding with the planter is because of depth control,” says Bohner. Soybeans seeded with the planter in 15-inch rows yielded about 1.8 bushels per acre more than soybeans seeded with the drill in 15-inch rows. The planter also yielded a 5.2 per cent plant stand advantage. When compare to the 7.5-inch drill, the planter yielded 0.8 more bushels per acre, and had a 7.3 per cent bump in plant establishment 30 days after seeding. There was no difference between plants seeded with a 15-inch drill and a 7.5-inch drill. Higher seeding rates increased yields significantly. Researchers found the most economical seeding rate at 7.5-inch spacing was about 186,000 seeds per acre. Bohner says the planters and the drills seemed to work best when seeding at a depth of 1.5
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Soybeans seeded with a Bourgault single manifold air drill on eight-inch spacing with narrow openers and a coil packer, with a medium seeding rate (201,124 seeds per acre).
Soybeans seeded with a John Deere multi manifold air drill on 10-inch spacing with narrow openers and on-row packing, with a medium seeding rate (201,124 seeds per acre).
PHOTOS: AGRISKILLS INC.
All three of these photos show soybean seeding trials conducted in 2010 for Manitoba Pulse Growers Association. These soybeans were seeded with a John Deere max-emerge vacuum planter on 15-inch spacing, with a medium seeding rate (171,910 seeds per acre). inches to 2.5 inches. The drill doesn’t seed as well at an inch to 1.5 inches. “The planter is not really quite there either, but at least it’s a little bit better when you’re seeding more shallow,” says Bohner.
MANITOBA TRIALS Brent VanKoughnet, owner of Agri Skills Inc., ran seeding trials for the Manitoba Pulse Growers Association from 2010 through 2012. The trials, located near
Carman, Man., looked at using planters and air drills at different seeding rates and row spacings. “Under the broadest range of conditions, the planter seems to be a reasonable hedge. You’re more likely to get a better plant
In This Issue
stand with a planter across the broadest range of growing conditions,” says VanKoughnet. Seed placement is more important in wider rows, VanKoughnet says. Large gaps in seven or » CONTINUED ON PAGE 4
Wheat & Chaff ..................
2
Features ............................
5
Columns ........................... 18 Crop Advisor’s Casebook
24
Machinery & Shop ............ 25 FarmLife ............................ 31
Oustanding young farmers LEE HART PAGE 5
Soybeans in Alberta
PATRICK FABIAN PAGE 16
Cattleman’s Corner .......... 34