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
- Root establishment and elongation as well as early crop growth
- Increases plant height and vigor
- Ca helps protect the bulbs against diseases and abiotic stress like chilling or salinity
Yara recommended fertilizers for Calcium
YaraVita® CALTRAC™
Onions: 1-2 quarts/acre applied at the 6 leaf stage. Repeat if necessary 10 to 14 days later. Also, 2 quarts/acre at bulb swelling, repeated once or twice at 10 to 14 day intervals. Water rate: 3 to 20 gallons/acre.
Read more about YaraVita® CALTRAC™YaraVita® POWERBOR™ Ca
Onion: 1½ to 2 quarts/acre as soon as there is sufficient foliage to intercept spray. A second application may be made at the same rate 10 to 14 days later. Water rate: 5 to 20 gallons/acre.
Read more about YaraVita® POWERBOR™ CaYaraVita® SENIPHOS™
Onions: 1 to 2 applications of 2 quarts/acre during bulb filling, with a 10 to 14 day interval between sprays. Water rate: 20 gallons/acre
Read more about YaraVita® SENIPHOS™YaraVita® STOPIT™
Onion: 2-4 quarts/acre at bulb swelling. Repeat applications at 7 to 14 day intervals as necessary. Water rate: 5 to 20 gallons/acre.
Read more about YaraVita® STOPIT™NUTRA-PHOS CALZINC
Onion: 3 to 10 lb. per acre per application. Repeat as needed. 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.
Read more about NUTRA-PHOS CALZINC
