Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulphur
B Boron
Fe Iron
Mn Manganese
Mo Molybdenum
Zn Zinc

Canola - Hollowness

Symptoms
Shortened internodes of the shoot lead to a stunted appearance. Splits and hollow lesions occur in stems and truncs.

Reasons
Boron deficiency

Canola - Deformation

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The leaves are small, deformed, crinkled and brittle. They show necrotic patches at leaf margin and lamina. Shortened internodes of the shoot lead to a stunted appearance. Splits and hollow lesions occur in stems and truncs.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Canola - Deformation

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The upper and middle leaves are small and stunted, deformed, crinkled and brittle. They may show necrotic patches at leaf margin and lamina.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Canola - Hollowness

Symptoms
Hollow brown lesions occur in the stem base.

Reasons
Boron deficiency

Canola - Deformation

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The leaves are small, deformed, crinkled and brittle. They show chlorotic mottling and violet discoloration at leaf margin and lamina. Leaves are cupped down. In severe cases the leaf blade is almost completely reduced to the midrib. Shortened internodes of the shoot lead to a stunted appearance. Flower and pod formation are inhibited.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Canola - Deformation

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The leaves are small, deformed, crinkled and brittle. They show chlorotic mottling and violet discoloration at leaf margin and lamina. Leaves are cupped down. In severe cases the leaf blade is almost completely reduced to the midrib. Shortened internodes of the shoot lead to a stunted appearance. Flower and pod formation are inhibited.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Canola - Deformation

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The leaves are small, deformed, crinkled and brittle. They show chlorotic mottling and violet discoloration at leaf margin and lamina. Leaves are cupped down. In severe cases the leaf blade is almost completely reduced to the midrib. Shortened internodes of the shoot lead to a stunted appearance. Flower and pod formation are inhibited.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Canola - Chlorosis

Symptoms
Symptoms of boron deficiency start on the younger part of the plant. The leaves are small, deformed, crinkled and brittle. They show chlorotic mottling and violet discoloration at leaf margin and lamina. Leaves are cupped down. In severe cases the leaf blade is almost completely reduced to the midrib. Shortened internodes of the shoot lead to a stunted appearance. Flower and pod formation are inhibited.

Reasons
Boron deficiency. Deformation of young leaf margins is similar to Ca deficiency.

Boron deficiency made worse by

  • Sandy soils
  • Alkaline soils
  • Soils low in organic matter
  • High levels of nitrogen
  • High levels of calcium
  • Cold wet weather
  • Periods of drought

Boron is important for

  • Better crop establishment and reduced plant losses over winter
  • Increases nutrient levels in the crop for better spring regrowth
  • Improved flowering and more even maturity
  • Boosts grain yield and oil content of seed

Yara recommended fertilizers for Boron

YaraVita® BORTRAC™

YaraVita® BORTRAC™

Canola: For a single application, 0.5 - 2 l/ha at onset of stem extension. For moderate deficiency, 0.5 - 2 l/ha at 4 to 6 leaf stage and 0.5 - 2 l/ha at onset of stem extension. An extra application can be made between 10 and 14 days later or up to the start of flowering. Water rate: 50 to 200 l/ha. Colza: Dans le cas d'une seule application, 0.5 - 2 l/ha au début montaison. En cas de carence moyenne, 0.5 - 2 l/ha au stade 4-6 feuilles et 0.5 - 2 l/ha au début montaison. Une application supplémentaire peut être effectuée 10-14 jours plus tard au stade début floraison. Volume d'eau: 50 à 200 l/ha.

Read more about YaraVita® BORTRAC™