Calcium deficiency-Soybean | Yara United States

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Nutrients

Soybean - Necrosis

Symptoms
Ca deficient plants show reduced leaf expansion, primary leaves are often cup-shaped when emerged. Brown spots on young leaves and premature leaf senescence occur.

Reasons
Calcium deficiency. Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soybean - Deformation

Symptoms
Ca deficient plants show reduced leaf expansion, primary leaves are often cup-shaped when emerged. Brown spots on young leaves and premature leaf senescence occur.

Reasons
Calcium deficiency. Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soybean - Necrosis

Symptoms
Small brown spots, coalescing to interveinal necrosis on young leaves, and premature leaf senescence occur due to calcium deficiency.

Reasons
Calcium deficiency. Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soybean - Chlorosis

Symptoms
Interveinal chlorosis on younger leaves due to calcium deficiency.

Reasons
Calcium deficiency. Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soybean - Necrosis

Symptoms
Striking leaf symptoms due to Ca deficiency: drop-like, whitish to bluish spots occur on the leaf blade. Necroses of the same color expand along the leaf margin.

Reasons
Calcium deficiency. Calcium deficiency is most common in acid, sandy soils low in organic matter.

Calcium deficiency made worse by

Acidic soils
Sandy or light soils (leaching)
Acid peat soils
Soils rich in sodium
Soils rich in aluminium
Drought conditions
Fruit high in nitrogen or potassium
Large fruit

Calcium is important for

Improved cell division and elongation
Proper working of cell membrane
Permeability of cell membrane

Yara recommended fertilizers for Calcium

YaraVita® CALTRAC™

Soybean: 1-2 quarts/acre at the 4 to 6 leaf stage. Repeat if necessary 10 to 14 days later. Water rate: 3 to 20 gallons/acre.

YaraVita® POWERBOR™ Ca

Soya Bean: 1 to 2 quarts/acre when crop is 4 to 6" tall. For moderate to severe deficiency, a repeat application may be necessary 10 to 14 days later. Water rate: 3 to 20 gallons per acre.

Read more about YaraVita® POWERBOR™ Ca

YaraVita® SENIPHOS™

Soybeans: 2 quarts/acre before flowering. Water rate: 3 to 20 gallons/acre.

YaraVita® STOPIT™

Soya bean: 2 to 4 quarts per acre at 4 to 6 inches tall (4 to 6 leaf) stage. Repeat as necessary at 7 to 14 day intervals. Avoid application during flowering Water rate: 5 gallons per acre.

NUTRA-PHOS CALZINC

Soya Bean: 2 to 10 lb. per acre per application. First application at bud to early-bloom stage, repeat in 2 to 3 weeks. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.