Concrete: Introduction

A photograph shows the yard outside a school with buckets, shovels and four piles of media: mulch (reddish fibers), topsoil (dark brown), limestone (pale beige), and sand (white). ... 2-cu. ft. bag sustainably harvested hardwood mulch, such as Melaleuca or eucalyptus (4) 5-gallon plastic buckets. ................
................

In order to avoid copyright disputes, this page is only a partial summary.