Northern Tilth provides organic waste recycling technical services.  Our goal is to increase the use of organic wastes as soil amendments  while helping to build the science of residuals recycling and soil fertility. Northern Tilth's clients range from generators of organic wastes, such as paper mills and food processors, to residuals management companies that focus on soil-based recycling solutions, to farmers integrating organic matter-based materials into their nutrient management programs.

While a large body of experimental data and field experience exists for some organic wastes, such as manures and biosolids, little is known about the interactions in a soil media for many other by-products that may have benefits as soil amendments. Northern Tilth specializes in research, development and initiation of recycling programs for these newer materials. Northern Tilth also specializes in working with complex regulatory issues related to soil-based recycling, such as determining environmentally sound soil blending recipes, assessing potential contaminants in soils, and improving soil nutrient balance when using organic-matter based soil amendments.

Andrew Carpenter opened Northern Tilth in December 2003 after managing organic waste recycling projects in northern New England for ten years. During that time, Andrew received an MS in Plant, Soil and Environmental Science from the University of Maine, where his research and field work focused on the biogeochemistry of topsoil manufactured with paper mill residuals. For additional information, please call Andrew Carpenter at the Northern Tilth office in Belfast, Maine (338-5500).