Sulfur-based calcium source.
loosen clay soils
10-15lbs per 100 sqft, mix into the soil
What is it?
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk.
How to apply it?
10-15 pounds per 100 sf, mix into the soil.
Modify spreaders with painted boxes, interior shields or partitions for gypsum application.
Make adjustments near the spreader gate to improve the distribution pattern.
Adjust the door height based on the application rate and the spreader’s ground speed.
Apply gypsum any time that it is appropriate to be in the field without damaging the soil or the crop.
Apply gypsum in any tillage system.
Use soil tests to determine gypsum rates.
After several applications, growers may benefit from variable-rate application.