I know we can make this clever USDA spreadsheet work below, but it seems that while the cells are active, they don’t accept keyboard entry when embedded in the page. Use the online link here instead to download it to your computer.
This spreadsheet lets you add the percentages of sand and clay to position your soil on the texture triangle. The embedded spreadsheet below may not work in some web browsers but it’s linked to this free Microsoft Office Online Excel spreadsheet where you can add your soil details. When you have positioned your soils, then use the Truffle Soil Charts here to see what varieties of truffle your soil is suitable for. It assumes that you will take four samples but it shows a quick result with just one. If you haven’t sent off for a soil test, see our DIY Flowchart in our Tools page here.