Fertility

Winter Canola Fertilizer Requirements

Fertilizer recommendations are based on winter wheat and should be used as a reference.
Soil should be tested prior to seedbed establishment. Test should include N, P, K, S and other micro nutrients.
The major nutrients are required in about the following ratio. N - 5 lbs, P₂O₅ - 2.4 lbs, K₂O - 4 lbs, S - 1 lb
In general, canola required approx. 25% more N, P, and K and about twice as much S compared to wheat.
Nitrogen can be banded for broadcast to the side of the seed. At lease 1 inch away from the seed.
In the fall N, P, K, S should be broadcast prior to planting. Only about 1/3 of the required N should be fall applied. Excess N can reduce winter hardiness.
Leaves in the fall determine winter hardiness.
Spring (dormancy break) apply the other 2/3 of N.
Limit use of liquid nitrogen because of limited absorption and potential burn.
Leaves in spring will determine yield.
N deficiency symptoms are yellowing of the lower, older leaves in the spring.
P deficiency symptoms are poorly developed root system and purple spring leaves.

Canola fertility needs table

Table for nitrogen requirements for winte conaola production in the great plains

fertility canola requirements fromt he canola couuncil of canada

Fertility N requirements table 4

Unlike winter cereals, canola has a high demand of S because of its high content of S-containing proteins. Sulfur allows the plant to use N efficiently.
Soils with less than 10 ppm S should receive 25 lbs S per acre.
Sulfur can be applied in the fall or with N in the spring.
Ammonium sulfate is preferred over elemental form.
Sulfur deficiency symptoms generally appear in the spring.
Young leaves become chlorotic, poorly developed, cupped with a reddish purple tinge and flowers that are pale yellow.