
Particle Size
Small particles decompose quicker than larger ones, because more of the total volume is exposed to decomposers. Chopping or shredding coarse and woody materials before adding them to the compost pile increases the surface area accessible to decomposers and therefore speeds up the composting process.
An alternative to purchasing a chipper or shredder is to simply place twigs and small branches in the driveway and run over them with the car a few times. Then simply sweep up the smaller pieces and place them in the compost pile.