Phosphorus deficiency vs. healthy plant-Broccoli

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Nutrients

Broccoli - Discolouration

Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.

Reasons
Phosphorus deficiency (right) Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought. Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.

Broccoli - Discolouration

Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.

Reasons
Phosphorus deficiency (left) Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought. Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.

Broccoli - Discolouration

Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. Leaf size is not affected.

Broccoli - Growth retardation

Symptoms
Plants show red discoloration on the edges of older leaves, with a yellowgreen transition zone. With severe P deficiency leaf size and plant growth are stunted.

Broccoli - Discolouration

Symptoms
Starting from the leaf margins, affected plants show red discoloration on older foliage. With severe P deficiency leaf size and plant growth are stunted.

Reasons
Phosphorus deficiency Phosphorus is important during early growth, especially for root development. However, deficiency is rarely seen as brassicas are efficient in extracting P from soil. Undersupply is often connected with cold soils and drought. Broccoli is more sensitive to P deficiency than cauliflower, cabbage and brussel sprouts.

Phosphorus deficiency vs. healthy plant made worse by

Acidic or very alkaline (calcareaus) soils
Low organic matter
Cold or wet conditions
Crops with a poorly developed root system
Soils with low P reserves
Soils with a high phosphate capacity
Iron rich soils

Phosphorus is important for

Early growth, especially for root development
Increases vigor in shorter season crops especially in adverse conditions
Improves marketable yield

Yara recommended fertilizers for Phosphorus

YaraVita MAGPHOS K

Broccoli: 4 l/ha applied at the 4 to 6 leaf stage soon after transplanting. Water rate: 30 to 200 l/ha. Also, when grown as a seed crop: 5 l/ha applied during the seed maturation phase. Water rate: 50 to 200 l/ha.

YaraVita SENIPHOS

Broccoli: 2 to 3 applications of 10 l/ha from stem extension/head development at 7 to 14 day intervals. Water rate: 75 to 200 l/ha.

YaraMila COMPLEX

Other recommended products

YaraVita CROPLIFT

Broccoli: 5 kg/ha at the 4 to 6 leaf stage. Repeat as necessary at 7 to 10 day intervals. Water rate: 200 l/ha.

YaraVita CROPLIFT-K

Broccoli: 5 kg/ha at the 4 to 6 leaf stage and as necessary at 7 to 10 day intervals. Water rate: 250 to 750 l/ha.

YaraVita MOLYTRAC 250

Broccoli: 250 to 500 ml/ha from 4 to 6 leaf stage. For moderate to severe deficiency, repeat applications should be made at the above rate at 10 to 14 days intervals. Water rate: 30 to 500 l/ha. Seedlings for transplanting: 5 ml per 5 l water over 1000 plants.