Soil and Additives

Oregon horticulturalist offers information on soil components, pH, testing methods, and nutrients, and means of improving it by using amendments and improving drainage and aeration.

Offering composting information and links to web resources on a variety of composting topics. Includes a forum.

Information on products and their content of heavy metals, along with fertilizer laws and label requirements.

Manufacturer of an organic mulch. Site gives usage information and a list of dealers who carry it.

Economical and environmental solution to septic for cottage, cabin, home or business. Waterless and low water models.

Bacterial bioaugmentation products for pit, vault, portable and composting toilets in outdoor recreation and remote living areas.

The composting toilet system products and book about more than fifty types of systems.