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Fertilizer Recommendation Tables - 2008 Revision

Author: Keith Reid - Soil Fertility Specialist/OMAFRA
Creation Date: October 2007
Last Reviewed: November 2008
2008 Revision

Nitrogen Requirements - Annual Field Crops

Crops

N Required
Kg/Ha

Oats, buckwheat, millet, spring rye (S. Ont.)

35

Oats, buckwheat, millet, spring rye (N. Ont.)*

55

Barley, all areas of Ontario with 2800 crop heat units or less

70** ***

Barley, all areas of Ontario with more than 2800 crop heat units

45

Mixed grain, flax, fodder rape, kale, (S. Ont.)

45

Mixed grain, flax, fodder rape, kale,(N. Ont.)*

70

Spring wheat (S. Ont. and N. Ont.)

70

Sunflower

90

Mustard

50

Winter wheat, winter barley

90***

Winter triticale

80

Winter rye - no computer print-out. Winter rye in tobacco rotation will be suggested by a tobacco specialist, otherwinter rye - 90 kg N/ha

  

Forages seeded without a nurse crop

0

Forages seeded with a nurse crop such as oats,mixed grain, spring wheat, barley or rye

 

15

Field Corn

See Worksheet

Soybeans

0

Field beans, peas
- with P205 and K2
- where no P205 and K2O is required


10
0

Sweet corn

90

Sorghum

100

Winter canola
- fall
- spring


up to 40
150

*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.

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