American Farmland Trust Working to stop the loss of productive farmland and promote healthier farming practices in the U.S. http://www.farmland.org/
Ecological Farming May Cause More Heavy Metals In The Soil Some systems of ecological arable farming which use only organic fertilisers contaminate the soil with levels of cadmium, copper and lead which are twice as high as when a combination of both animal manure and artificial fertiliser is used. http://www.scienceagogo.com/news/19990109225423data_trunc_sys.shtml
GRACE Factory Farming Information, ideas, and strategies for activists opposed to factory farming. Topics cover the environmental, health, economic, social and animal welfare costs of large-scale animal production, as well as trends toward sustainable alternatives to factory farms. http://factoryfarm.org/
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