Calcium and Sulfur Follow Close Behind N, P, and K
Oct 08, 2025
They aren’t among the big three (N, P, and K) and are considered “secondary macronutrients,” but sulfur (S) and calcium (Ca) “play a critical role in plant growth,” said Chris Schmidt, Federated ag sales rep for Rush City. Your Federated Agronomists recommend Gypsoil® to replenish the calcium and sulfur in your soils.
Gypsoil, a pelletized gypsum product with a guaranteed analysis of 21% Ca and 17% S, can be applied in fall or spring, “depending on crop needs and soil type,” said Schmidt. (Of course, a soil test is the best way to make that determination.)
Calcium helps the crop build strong cell walls and supports root development. It also promotes soil porosity, which improves soil aeration, drainage, and overall soil structure.
Sulfur is often deficient in the soils of Federated’s service areas; it aids in chlorophyll formation and protein synthesis. Schmidt said, “Sulfur is a season long nutrient, with over half of plant uptake needed after reproductive stages in both corn and soybean production.”
Gypsoil offers a consistent pellet size for more accurate application and mixing. It is also pH neutral and will not acidify the soil (as other sulfur sources can).
Gypsoil is also less water soluble than other sulfur products, leading to both early and extended season nutritional availability while being less susceptible to soil leaching.
Recommended for corn, soybean, and hay crops, Gypsoil can fuel your crops’ nutritional needs and “fall offers a greater application window” than does the busy spring, Schmidt noted.
Talk to your Federated Agronomist about your crops and soils to see if Gypsoil should be part of your autumn plans. Gypsoil supply is good this fall.
Gypsoil, a pelletized gypsum product with a guaranteed analysis of 21% Ca and 17% S, can be applied in fall or spring, “depending on crop needs and soil type,” said Schmidt. (Of course, a soil test is the best way to make that determination.)
Calcium helps the crop build strong cell walls and supports root development. It also promotes soil porosity, which improves soil aeration, drainage, and overall soil structure.
Sulfur is often deficient in the soils of Federated’s service areas; it aids in chlorophyll formation and protein synthesis. Schmidt said, “Sulfur is a season long nutrient, with over half of plant uptake needed after reproductive stages in both corn and soybean production.”
Gypsoil offers a consistent pellet size for more accurate application and mixing. It is also pH neutral and will not acidify the soil (as other sulfur sources can).
Gypsoil is also less water soluble than other sulfur products, leading to both early and extended season nutritional availability while being less susceptible to soil leaching.
Recommended for corn, soybean, and hay crops, Gypsoil can fuel your crops’ nutritional needs and “fall offers a greater application window” than does the busy spring, Schmidt noted.
Talk to your Federated Agronomist about your crops and soils to see if Gypsoil should be part of your autumn plans. Gypsoil supply is good this fall.