i am in the process of building raised beds. the dims are: 16 ft long 12 inches deep and 30 inches wide. they are white oak and weigh about 350 lbs. so far i have put in 8 20 lbs bags of humus, 8 20 lb bags of topsoil and 8 20 lb bags of manure. take a guess at how many for one bed. i will let you know when i finish the first one. got 5 to go.
william- in yellville