How much land plaster to use on string beans?

For string beans, a general recommendation is to apply about 50 to 75 pounds of land plaster (gypsum) per acre to improve soil structure and provide calcium. If you're gardening on a smaller scale, you can apply about 1 to 2 pounds per 100 square feet. It's important to incorporate it into the soil before planting for the best results. Always consider a soil test to tailor the application to your specific soil needs.