Sheet Mulching -

This can be a good use for your cardboards

clipped from www.agroforestry.net Sheet Mulching: Greater Plant and Soil Health for Less Work Step 1: The Concentrated Compost Layer by adding enriched compost, poultry or stock manure, worm castings or the like at the rate of about 50 lbs/100 square feet. Step 2: The Weed Barrier Underneath this weed barrier grasses and weeds die and quickly become food for earthworms. From now on, the worms turn and aerate the soil, as they do naturally when in the right environment. Materials for the weed barrier that work well are: 4-6 sheets of newspaper, cardboard, burlap bags, old rugs of natural fiber, worn-out jeans, gypsum board, or whatever you can find around. Banana, ape and ti leaves also work if laid down in several layers. Step 3: The Compost Layer This layer is on top of the weed barrier - it must be weed seed free. Well conditioned compost, grass clippings, seaweed and leaves are ideal materials to spread over the weed barrier. Step 4: The Top Layer