Nutrients

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

Cabbage - Deformation

Symptoms
Boron deficiency symptoms start on the younger leaves. They remain small, are curled down and become deformed. The leaves show chlorotic mottling on the edges and between the veins. Necrosis may appear on leaf margins and intercostal fields. In case of ongoing deficiency only light heads are built and plant growth is severely stunted.

Reasons
Boron deficiency on white cabbage Boron is readily leached in sandy soils, particularly those in the tropics with low soil pH, CEC or low organic matter contents. Brassicas need B in relatively large amounts.

Cabbage - Deformation

Symptoms
In case of ongoing B deficiency only light heads are built and plants show a rather loose habitus. Leaf color is brighter than usual.

Reasons
Boron deficiency on white cabbage (right) Boron is readily leached in sandy soils, particularly those in the tropics with low soil pH, CEC or low organic matter contents. Brassicas need B in relatively large amounts.

Cabbage - Deformation

Symptoms
In case of ongoing B deficiency only light heads are built and plants show a rather loose habitus. Leaf color is brighter than usual.

Reasons
Boron deficiency on white cabbage Boron is readily leached in sandy soils, particularly those in the tropics with low soil pH, CEC or low organic matter contents. Brassicas need B in relatively large amounts.

Cabbage - Chlorosis

Symptoms
In case of ongoing B deficiency only light heads are built and plants show a rather loose habitus. Leaf color is brighter than usual.

Reasons
Boron deficiency on white cabbage Boron is readily leached in sandy soils, particularly those in the tropics with low soil pH, CEC or low organic matter contents. Brassicas need B in relatively large amounts.

Cabbage - Chlorosis

Symptoms
In case of ongoing B deficiency only light heads are built and plants show a rather loose habitus. Leaf color is brighter than usual.

Reasons
Boron deficiency on white cabbage Boron is readily leached in sandy soils, particularly those in the tropics with low soil pH, CEC or low organic matter contents. Brassicas need B in relatively large amounts.

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

  • Stabilization of plant tissues and improved plant and crop strength, working together with Ca
  • Reducing effects of nutritional disorders such as tip burn and hollow heart
  • Probably minimizing club root
  • Increased crop quality and yield

Yara recommended fertilizers for Boron

YaraVita BORTRAC 150

YaraVita BORTRAC 150

Cabbage: 3 l/ha at 4 to 6 leaf stage with repeat applications at the above rate at 10 to 14 day intervals for moderate to severe deficiency. Water rate: 50 to 200 l/ha.

Read more about YaraVita BORTRAC 150

YaraVita MOLYBOR

YaraVita MOLYBOR

Cabbage: 2 to 3 l/ha applied at the 4 to 6 leaf stage. Repeat at 14 day intervals if necessary. Water rate: 200 l/ha.

Read more about YaraVita MOLYBOR

Other recommended products

YaraVita BRASSITREL PRO
Cabbage: 3 to 4 l/ha as early in the growing season as possible, provided there is adequate leaf cover to intercept the spray (e.g. 4 to 6 leaf stage). Repeat as necessary at 10 to 14 day intervals up to one month before harvest. Water rate: 200 l/ha.
YARA SOLUBLE BORON
Cabbage: 3 kg/ha at 4 to 6 leaf stage, repeated once or twice at 10 to 14 day intervals for moderate to severe deficiency. Water rate: 50 to 200 l/ha.