Sulfate of potash (K₂SO₄) is a dual nutrient with an equivalent potassium content of 50 percent potassium oxide (K₂O), commonly referred to as potash, and 50 percent sulfate (SO₄).

Sulfate of potash is the most effective product to build vital potassium and sulfur nutrition for high yields and consistent quality in specialized agriculture and turf markets because, unlike other potassium sources, it contains virtually no chloride which can damage crops. GSL's SOP has the lowest salt index of all major potassium sources.

THE NEED FOR POTASSIUM

Potassium is vital to agriculture because it enhances quality and yields of food crops by improving water retention, nutrient value, taste, color, texture, and disease resistance. It also promotes the efficient use of nitrogen (N) and other nutrients.

Symptoms of potassium deficiency in plants include:

*      Slowed growth

*      ‘Tip burn' and marginal chlorosis / necrosis on more mature leaves

*      Weak stem and stalks

*      Small fruit and shriveled seeds

THE NEED FOR SULFUR

Sulfur (S) is a component of three amino acids (cystine, methionine, and cysteine) and is necessary for protein synthesis, chlorophyll transport and nitrogen utilization. Sulfur improves root strength and growth of plants as well as the aroma and taste of fruits and vegetables. Sulfur is frequently referred to as the fourth major nutrient.

Symptoms of sulfur deficiency in plants include:

*      Slowed growth rate and delayed maturity

*      Young leaves light green to yellowish color

*      Small and spindly plants

Sulfate is the water-soluble and readily available form of sulfur (S). Soils used to have higher sulfur content than today, but sulfur deficiencies have become more common in recent years due to a number of factors. These include higher air quality standards that lowered sulfur emissions, increased crop yields that draw a greater amount of sulfur nutrients out of the soil, and more use of relatively sulfur-free nitrogen and phosphorus fertilizers.