With all the recent discussions on topdressing and such I was wondering if anyone would like to explore the different types of soil admentments available to us. For example: compost, sand, topsoil, sawdust, and ground up wood chips. Maybe list of pro's and con's of each. Using wood products is new to me but sounds interesting for building long term om levels. Does the sawdust filter down into the grass / aeration holes or mat up if it gets wet? How does the sawdust / wood chips affect seed germination? Would it benefit to combine sawdust with topsoil/compost? How many cu yds / 1000 sq ft of sawdust would be optimum? Are you using a topdressor to spread it or a blower? Where would you buy it in large quantities?