How much oyster mushroom yield per kg of dry straw substrate?

For oyster mushroom, yield is usually quoted against dry substrate. With good straw, fresh spawn and proper humidity, growers commonly get fresh mushroom in the broad range of about 500 to 800 grams per kg of dry straw across two to three flushes, which is a biological efficiency of roughly 50 to 80 percent or sometimes more in well run units. The first flush is usually the biggest, with later flushes tapering off. Beginners often land at the lower end until they get humidity and contamination under control. Treat this as a planning range and confirm with local growers and your KVK, since species, substrate quality and climate all shift the result.