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SOP fertilizer, or sulfate of potash, is a premium potassium fertilizer that is primarily composed of potassium sulfate. It is known for its high solubility and low chloride content, making it suitable for sensitive crops. SOP fertilizer is typically used to enhance plant growth, improve fruit quality, and increase crop yields, especially in chloride-sensitive plants such as fruits, vegetables, and some ornamentals.
| Chemical Composition | Potassium sulfate (K2SO4) |
| Potassium Content | 50-52% K2O |
| Sulfate Content | 18-20% SO4 |
| Solubility | Highly soluble in water |
| Granule Size | Typically 0.5 to 2.0 mm |
When selecting SOP fertilizer, buyers should consider the specific potassium needs of their crops as well as the soil's current nutrient profile. It's important to specify the desired granule size and any specific quality grades or certifications required for organic farming. Additionally, buyers should determine the quantity needed based on their planting area and crop type to ensure optimal application rates.
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Crops such as fruits, vegetables, and ornamentals that are sensitive to chloride.
Yes, SOP fertilizer can be used in organic farming if it meets organic certification standards.
It can be applied as a top dressing, incorporated into the soil, or used in fertigation systems.
SOP contains potassium sulfate and is low in chloride, while MOP (muriate of potash) contains potassium chloride.
Yes, it is effective in various soil types but is particularly beneficial in chloride-sensitive conditions.
Application rates vary but typically range from 100 to 300 kg per hectare based on crop needs.