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Business Confidential
Growing Corn in AlbertaAgronomy Update
Lethbridge Ab
Nicole RasmussenArea Agronomist S. AB + BC
DuPont Pioneer
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• Understanding Corn Maturity
• Hybrid Selection
• Plant Population
• Planting
• Fertility
• Weed Control
• Insects
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Understanding Maturity
• No industry standard
• CHU, GDD, CRM
• Maturity to grain or silage
• Long Term Average CHU – Alberta Ag ACIS
– Farm Zone
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10 ft
7 ft
Variety Pio 39N03 Pio 39K72 Pio 3984 Amaizing Graze
Heat Unit Rating 2000 2150 2150 2600?
DM Weight (whole plant) 210 grams 170 grams 145 grams 140 grams
2001
Ponoka, AB
Plant Height
vs
DM Weight
A B C D
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Hybrid Selection - Traits
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Plant Populations
– Early corn responds better to higher populations.
– Depending on region and level of early stress – best results observed between 28,000 and 34,000 ppa.
– 32000 is the general rule
– Increase population by 10% if seeding in cold wet soils
15 lbs
17 lbs
21 lbs
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Planter vs. Air Seeder Kenton, Manitoba -
2008
ProductPlanting Method
PlantPopulation
SilageWeight
(30% DM)
Whole Plant
Moisture
Hybrid A Planter 29,900 ppa 16.75 70.5%
Hybrid A Air Seeder 29,900 ppa 14.80 71.9%
Hybrid B Planter 29,900 ppa 16.80 66.8%
Hybrid B Air Seeder 29,900 ppa 13.23 68.7%
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Nutrient Removal as a Soil Fertility Planning Tool - 2002
Dr. A.M. Johnston
Western Canada Director, Potash & Phosphate Institute
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Safe Rates of Starter/Popup Fertilizer
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Stand Establishment/ Emergence
• Minimum soil temperature 8-10C
• Seeding Depth – 1.5”- very imp
• 1-5 day weather – do not plant if expecting cold rain/snow
• Proper seed placement – spacing
• Even emergence – effect of runts
• Avoid if possible planting corn into canola stubble
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Cold Chill
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How to Stage a Corn Plant
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Early Season Frost
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V2
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Herbicide Timing effect on Corn Yield
2” 4” 6” 8”
105
120
145• Weed competition in corn is
most damaging early in the
growing season.
• Corn yields are reduced
when weeds are allowed to
grow past 4”.
• Herbicide application needs
to occur before weed canopy
exceeds 4” for consistent
weed control and maximum
corn yield.
Weed Canopy Height At Herbicide
Application
160
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Insects
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Nicole RasmussenArea Agronomist – Southern Alberta/BC DuPont PioneerEmail: [email protected] 403-223-8794