Soil amendments

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Soil amendments include products added to soils or growing media to improve physical qualities. This article is a comparison of the heavy metal concentrations in soil amendment products, as reported to the Oregon Department of Agriculture (ODA) and Washington State Department of Agriculture (WSDA). The analyses from the WSDA show the quantities of heavy metals, in parts per million (ppm), of arsenic (As), cadmium (Cd), cobalt (Co), mercury (Hg), molybdenum (Mo), nickel (Ni), lead (Pb), selenium (Se), and zinc (Zn) present in a sample of the product. Analyses from the ODA show the quantities of arsenic (As), cadmium (Cd), mercury (Hg), nickel (Ni), and lead (Pb) present in a sample of the soil amendment.

The information on WikiFootprints was last retrieved from the ODA and WSDA websites on 05 May 2017. WikiFootprints is not an official source of this information and may not represent the most recent analysis of a product. Official data can be obtained from the Oregon Department of Agriculture Fertilizer Program website and the Washington State Department of Agriculture Fertilizer Product Database website. Links to the sources of this information can be found in the references section of each individual product page. The name of each product in the table on this page links to the product pages.

Soil Amendment Metal Content Analyses[edit]

The following abbreviations or symbols are used in the table below: As (Arsenic), Cd (Cadmium), Co (Cobalt), Hg (Mercury), Pb (Lead), Mo (Molybdenum), Ni (Nickel), Se (Selenium), Zn (Zinc)

Fertilizer metal concentrations (ppm)
 OregonWashington
ProductAsCdPbHgNiAsCdCoPbHgMoNiSeZn
Miracle-Gro Perlite 0.07-0.07-0.07 < 0.914 < 0.457 < 0.457 < 0.031 < 0.457 0.914 0.457 0.457 0.457 0.031 1.37 0.457 1.37 3.75