In my 10×16 inch tray, I use 1/2 lb of seed, which is approximately a little over 1 cup. This in turn yields about 12-16 ounces of juice. The actual yield varies depending on blade height, seed quality, and your gardening skills. Those last two items are crucial, so please take care. The growing chapter in my book WHEATGRASS NATURE’S FINEST MEDICINE is brimming with solid hands-on growing help, short cuts, headache solvers, and tips from the world’s most successful growers.