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Fertilizer Recommendation Tables
- 2010 Revision
2010 Revision
Nitrogen Requirements - Annual Field Crops
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Crops
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N Required
Kg/Ha
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Oats, buckwheat, millet, spring rye (S. Ont.)
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35
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Oats, buckwheat, millet, spring rye (N. Ont.)*
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55
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Barley, all areas of Ontario with 2800 crop heat units or less
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70** ***
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Barley, all areas of Ontario with more than 2800 crop heat units
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45
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Mixed grain, flax, fodder rape, kale, (S. Ont.)
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45
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Mixed grain, flax, fodder rape, kale,(N. Ont.)*
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70
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Spring wheat (S. Ont. and N. Ont.)
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70
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Sunflower
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90
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Mustard
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50
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Winter wheat, winter barley
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90***
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Winter triticale
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80
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Winter rye - no computer print-out. Winter rye in tobacco rotation
will be suggested by a tobacco specialist, otherwinter rye - 90
kg N/ha
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Forages seeded without a nurse crop
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0
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Forages seeded with a nurse crop such as oats,mixed grain, spring
wheat, barley or rye
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15
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Field Corn
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See
Worksheet
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Soybeans
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0
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Field beans, peas
- with P205 and K2
- where no P205 and K2O is required
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10
0
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Sweet corn
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90
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Sorghum
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100
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Winter canola
- fall
- spring
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up to 40
150
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*N. Ontario refers to Algoma, Cochrane, Kenora, Manitoulin, Parry Sound
and Muskoka, Nipissing, Rainy River, Sudbury, Temiskaming and Thunder
Bay districts.
**Where lodging is expected, use of a plant growth regulator or a strong
strawed barley variety should be considered. Barley grown on areas with
greater than 2800 crop heat units should receive 45 kg N/ha, not 70 kg.
***More accurate nitrogen requirements for winter wheat and barley, adjusted
for yield and fertilizer cost, may be obtained by referring to the cereals
section of the OMAFRA Agronomy Guide for Field Crops, Publication 811.
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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