Oregon has tested nutrients/fertilizers for the last 3 and 1/2 years
You can see concise amounts of what's in your favorite fertilizer.
Here's the links
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2009_0630.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2008_1231.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2007_1231.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2006_1231.pdf
you can get the specs on your products by typing the name of your product or brand name in the form here:
http://oda.state.or.us/dbs/heavy_metal/search.lasso
You can see concise amounts of what's in your favorite fertilizer.
Here's the links
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2009_0630.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2008_1231.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2007_1231.pdf
http://www.oregon.gov/ODA/PEST/docs/pdf/lab_2006_1231.pdf
you can get the specs on your products by typing the name of your product or brand name in the form here:
http://oda.state.or.us/dbs/heavy_metal/search.lasso