Powder Manganese Sulphate

Manganese deficiency is most often seen on well drained neutral or calcareous soils but heavy fertilizer usage can induce it in other soils, particularly after heavy applications of lime.

Many vegetable crops are affected with onions, beetroots, parsnips, cabbages and cauliflowers, tomatoes and pumpkins the most susceptible.

Deficiency is controlled by using manganese sulphate as a soil applicant or a foliage spray.

Manganese (chemical symbol Mn) deficiency occurs in a wide range of crops with onions, beetroot, parsnip, cabbage, cauliflower, tomato and pumpkin the most susceptible. This deficiency is most common on alkaline soils (high pH), particularly if the irrigation water contains high levels of bicarbonate. Manganese is needed for a number of plant functions including chlorophyll synthesis. It is a partially mobile element in the plant so symptoms may first appear in the youngest or oldest leaves. 

Manganese deficiency is controlled by using manganese sulphate (MnSO4 .7H2O) as a soil applicant or a foliage spray. Chelated forms of manganese can also be used as a foliar spray although this treatment is more expensive.