Had some hybrid brassica seeds from Grandpa Ray's and some Kale. Both measured very close to 2.5 cups per pound. I'm guessing that may change from seed supplier to seed supplier depending on seed moisture and coating/inoculant. My clovers and chicory are in sealed bags, but will check them too when ready to use. I fully understand the kitchen scales, just trying to get a good, close in field method so I dont have to premeasure at home first.