Recent research has shown a benefit from applying sulfur in fields low in organic matter and in high residue situations where mineralization and release of sulfate sulfur from organic matter are limited.
What can make sulfur application challenging is that the form of sulfur available for crop uptake is sulfate. Lack of sulphur in soils threatens crop quality and yield, and there is a need for high performance sulphur enhanced fertilizers to meet the challenge.
Commercial sulfur fertilizer sources include either elemental or sulfate forms of sulfur. The difference between the two is that sulfate sulfur forms, such as gypsum or ammonium sulfate, contain readily available sulfur, while elemental sulfur must be oxidized to sulfate prior to plant uptake.
One of the most common products containing sulfur is elemental sulfur mixed with bentonite clay, which helps form elemental sulfur into small disks called pastilles.
there are three viable alternative application of liquid forms of sulfur on the soil surface to the side of the seed row with the planter, liquid sulfur included with sidedress N application, or liquid sulfur included with pre-emerge herbicides.
Fertilizers Containing Sulphate
Ammonium Phosphate Sulphate
Potassium Magnesium Sulphate
Sulphates of Micronutrients
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