Principles of application
Application rate of fertilizer depends on crop and soil type. Magnesium sulphate that has been applied in dry soil does not work. Under condition of sufficient water availability in soil, fertilizer is intensively absorbed by plants’ root system. Magnesium sulphate mixed with soil uniformly distributes over soil profile and thereby magnesium and Sulphur become more accessible to plant. Pellets that have been left on the surface decompose in case of sufficient humidity. Magnesium and Sulphur become accessible to plant only after migration down the soil profile. There is no nutrient loss from granules left on surface, but such dressing is also non-effective. Side dressing on winter crops is applied in early winter over frozen soil simultaneously with nitrogen fertilizers. In gardening, side dressing is applied before resumption of intensive vegetation or after harvesting.
Foliar application doses of magnesium sulphate monohydrate are to be 1-4 kg/ha with maximal concentration 2% (200l/ha of water/water solution), magnesium sulphate seven hydrate – 2,5% (200l/ha of water or water solution).