We’ve said it before, but compost application is both an art and a science. As such, determining the most suitable volume of material for your application needs does require some math. To help you run your numbers, here are a couple tools we have developed.
Use the Volume Calculator to enter the dimensions of your applied area (crop row, raised bed, garden, lawn, etc.) along with the depth of material (compost, blend, bark) that you plan applying. You can experiment with the applied depths based on your budget and growing needs.
For orchard application, a few more variables need to be taken into account. Use the Orchard Row Calculator to enter your orchard block acreage, the application dimensions, and tree row spacing to estimate your application rate/acre.