Specifications include, but are not limited to: CRUSHING, SCREENING, ETC. OF STONE AND OTHER ROAD 335 FERTILIZERS AND SOIL CONDITIONERS 595 NURSERY STOCK, EQUIPMENT, AND SUPPLIES. Mulch: Mulch is a soil covering used to control weeds or erosion; retain moisture in soil; and insulate soil. Mulch is also used for aesthetic purposes. Organic materials commonly used for mulch include wood chips, ground up landscape trimmings, shredded bark, coarse compost material, straw, and shredded paper. Non-organic materials include crushed concrete and brick, stones and gravel, lava rock, and plastic film. Mulch is often used in the following applications: weed suppression, erosion control, topsoil production, dust abatement, moisture retention in soil, landscape area top-dressing/decoration, playground area cover, and hiking and equestrian trail maintenance. Mulch types that may be ordered through a contract resulting from this solicitation include: 3.2.1.1 Crushed Red Brick Mulch Nuggets 3.2.1.2 Red Mulch 3.2.1.3 Spanish Gold Mulch 3.2.1.4 Melaleuca Mulch 3.2.1.5 Chattahoochee Gravel (Brown River Gravel)