Physical Description:
Bittersalz, EpsoTop or Magnesium Sulphate Heptahydrate (MgSO4.7H2O) is a cream or white powder or crystalline material. Available only in 25kg woven polypropylene bags and premixed with fertiliser.
Uses:
Magnesium Sulphate is used as a soluble salt for outdoor and glasshouse fertigation programmes as well as a foliar fertiliser for application to crops to help overcome magnesium deficiencies.
Benefits:
Magnesium Sulphate is a cost-effective way of supplying magnesium via fertigation programmes. As a foliar application to broadacre crops it will provide a temporary relief of magnesium deficiency symptoms. Applications may be useful when conditions are very wet or cool where QuickTest Mg levels are less than 8-12.
Application:
For crops such as cereals, potatoes, and outdoor vegetables, Magnesium Sulphate is typically dissolved in water (2-5kg Magnesium Sulphate /100 litres water) and sprayed on when herbage Mg levels are low or deficiency symptoms occur. Care is required, as this product can be phytotoxic to crops, therefore ensure foliar applications are made early morning or in the evening to risk the risk of leaf burn. Although soluble in water, Magnesium Sulphate may not be compatible with other products. For fertigation purposes (in the field or under glass), if applied continuously, use concentrations of 0.05 - 0.075% for soil media and 0.05 - 0.15% for soil-less media.
Storage & Handling:
Magnesium Sulphate is mildly irritant, so care should be taken to avoid contact with eyes. Store in a cool, dry covered facility, and that the bag is closed properly after use.
Source:
Germany