| ≥1 piece |
K2O MIN. %50
Na MAX. %2
Cl MAX. %2.5
S MIN. %17.5
Cd MAX. 25 PPM
Pb MAX. 50 PPM
MOISTURE MAX. %1.5
SIZE (1-5) MIN. %90
Packing: In 50kgs/wpp bag
Functionality:
Potassium sulfate is commonly used as a specialty fertilizer on crops that are sensitive to soil chloride levels, such as potatoes, lettuce, tobacco, avocados, peaches, and legumes. It is also used in cases where chloride build up may be problematic. Mined and synthesized potassium sulfate are identical, and thus are functionally interchangeable. Worldwide, almost all technical grade potassium sulfate production (>99%) is used in agriculture. The remaining SOP is used in a wide range of industrial uses and for manufacturing potassium alum, potassium carbonate, and glass (Horn 2000).
Potassium comprises 2.4 percent of the earth’s crust, and it is present in large quantities in most soils, ranging between 0.5 and 2.5 percent. Like all mineral nutrients, the amount of plant-available potassium present is dependent on biochemical reactions in the soil. Plant available soil K is derived from additions of soluble K, and from weathering of soil parent material. Soils vary widely in their ability to replenish solution K+ depending on the age of the soil, fixation of K+ by soil particles, and the degree of leaching. The rate of weathering of potassium-bearing soil minerals is driven by K removal through crop uptake and leaching. K bound to the parent material is referred to as non-exchangeable or mineral K, and release of this K is generally too slow to meet crop requirements, hence the need for K adjuvants. Soil texture also exerts a strong influence on K+ availability. The potential for replenishment of solution K+ is extremely small in sandy soils where the cation exchange capacity (CEC) is due mainly to organic matter. Crops grown on sandy or highly weathered soils may experience K deficiency symptoms after a few years of cropping.