Center for Agriculture in the Environment(site info)
US nonprofit research center that conducts public policy research to reduce the loss of productive farmland and to promote farming practices that lead to a healthy environment. Information about projects, grant opportunities, and beneficial farm practices.
http://www.aftresearch.org/
2.
Nutrient and Water Policy Update(site info)
About U.S. federal and Pennsylvania state policies and programs to reduce environmental impacts of animal agriculture operations, plus information and links on agricultural water use and quality, impacts of concentrated animal feeding, and related topics.
http://agenvpolicy.aers.psu.edu
Acid Sulfate Soils(site info)
On management of acid-forming soils in coastal New South Wales (Australia) agriculture. Drainage of coastal flood plains exposes these soils and releases acid leachate, aluminium, iron, and heavy metals into water.
http://www.agric.nsw.gov.au/reader/8632