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Canola
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Below is a canola (Brassica napus L.) tissue nutrient sufficiency table by growth stage, including macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur), micronutrients (boron, copper, iron, manganese, zinc, molybdenum), leaf water content (LWC), and Brix values. These values are based on leaf tissue analysis (typically the youngest fully expanded leaf) and are derived from agricultural research, such as guidelines from the Canola Council of Canada, University of Manitoba, and other canola-growing regions, adjusted for canola physiology.

Growth stages are simplified into the following:

  • Vegetative (rosette to stem elongation)
  • Bud Formation (pre-flowering)
  • Flowering (bloom)
  • Pod Development to Maturity (pod fill to ripening)
  • Harvest

Nutrient concentrations are in percentages (%) for macronutrients and parts per million (ppm) for micronutrients, with LWC as a percentage of fresh weight and Brix (°Bx) as soluble solids in sap.

Growth Stage

N (%)

P (%)

K (%)

Mg (%)

Ca (%)

S (%)

 

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Vegetative

4.00

5.50

0.30

0.60

2.50

3.50

0.30

0.60

1.00

2.00

0.60

1.00

Bud Formation

3.50

4.50

0.30

0.50

2.00

3.00

0.30

0.60

1.50

2.50

0.50

0.90

Flowering

3.00

4.00

0.20

0.40

1.80

2.50

0.30

0.60

1.50

2.50

0.50

0.80

Pod Fill to Maturity

2.50

3.50

0.20

0.40

1.50

2.00

0.30

0.60

1.00

2.00

0.40

0.70

Harvest

2.00

3.00

0.15

0.30

1.00

2.00

0.20

0.40

1.00

1.50

0.30

0.50

                         
 

B (ppm)

Zn (ppm)

Mn (ppm)

Fe (ppm)

Cu (ppm)

Mo (ppm)

 

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Vegetative

20

50

20

60

20

100

50

150

5

15

0.10

1.00

Bud Formation

25

60

20

60

20

100

50

150

5

15

0.10

1.00

Flowering

30

70

20

60

20

100

50

150

5

15

0.10

1.00

Pod Fill to Maturity

20

50

20

60

20

100

50

150

5

15

0.10

1.00

Harvest

15

30

15

50

20

75

30

100

4

10

0.10

0.80

                         
 

LWC

BRIX

               
 

Min

Max

Min

Max

               

Vegetative

85

90

8

12

               

Bud Formation

80

88

10

15

               

Flowering

78

85

12

18

               

Pod Fill to Maturity

75

82

8

14

               

Harvest

70

78

8

12

               

 

Scanning Recommendation:

  • Ensure that over 25% of the scan bed is covered with a single layer of vegetation.
  • Leaf selection should be similar to this illustration.

 

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