demonstration gardens serve a purpose. they allow gardeners to demonstrate how something could or should be grown. more importantly, the garden is a teaching tool for both the visitors and believe it or not, the master gardeners who work there. the name "master gardener" is a serious misnomer. we are not masters, we are students of the garden and it schools us regularly!
for the first method, we built a raised lasagna bed. we had an empty 4'x4' bed and decided to put it to use for this experiment. to create a lasagna bed, we used the materials we had on hand in the garden. the first layer into the bed was from our most recent delivery of wood chips, it took about 6 cubic feet to fill the bed about a third of the way.
the next layer into the bed was about 6 cubic feet of mulched leaves.