EarthWorks Soil Amendments, Inc.
Company formed to provide the landscape/soil remediation industry expertise in all facets of soil management.
http://www.ewsa.com

Poulenger USA, Inc.
Poulenger USA, Inc. , an innovator and manufacture of organic based biostimulants, insect control, wetting agents, mychorrizae products, drought relief products, soil amendments and soil moisture management products. All products are environmentally safe and non-hazardous.
http://www.poulengerusa.com/

Stabilizer Solutions, Inc
USA. Suppliers of natural soil binders, manufactured soil amendments and engineered fiber reinforcement systems for dirt, sand and turf surfaced sports fields, race courses, recreational areas, pathways, drives and parking areas.
http://www.stabilizersolutions.com/

Fytogreen Pacific - Water saving soil amendments
Fytofoam, an environmentally safe, biodegradable inert resin soil amendment with superior water absorption capacity, provides water saving of 50%, and healthier, better looking turf.
http://www.fytogreen.us

Organic Resource Database
Aims to collate existing data on chemical and physical attributes, decomposition behavior in soils and animal feed value. To provide data for soil decomposition and nutrient cycling models and to identify best materials as soil amendments. Freely available to researchers.
http://www.wye.ic.ac.uk/sme/projects/soil/ord2.htm

Green Sol
Green SOL Inc., markets a complete line of specialty products including plant growth regulators, adjuvants, soil amendments, and micronutrients.
http://www.greensol.com/

Art Wilson Co.
Today's vision for the future of Art Wilson Company is to develop, produce and market quality soil amendments and fertilizers for all types of end users; i.e., agriculture, golf courses, municipalities, nurseries and home owners. Long term planning also includes the processing and blending of specialized products from natural minerals.
http://www.awgypsum.com/

Encap, LLC
ENCAP, LLC of Green Bay, WI, develops and markets proven advanced technologies for erosion control, seed establishment, fertilizer runoff, and other environmental management challenges. These technologies offer solutions to the landscape, agricultural, and forest fire restoration markets. ENCAP’s science-based advanced technologies focus on solving real-world problems that address the heart of environmental challenges.
http://www.encapseed.com

Sustane Natural Fertilizers
Sustane / Natural Fertilizer of America is the leader in organic based fertilizers, amendments, and plant biostimulants. We aim to provide the best natural and organic products for environmentally compatible turf, landscapes and food production.
http://www.sustane.com/

Hydraulic Press Brick Co.
Manufacturers of Haydite expanded shale lightweight aggregates for structural concrete and masonry applications, soil amendments, and ground covers.
http://www.hpbhaydite.com/