Sampling of soils for trace element studies.
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D003035:Cobalt / Q000032:analysis; D003677:Deficiency Diseases / Q000209:etiology / Q000662:veterinary; D004777:Environment; D004782:Environmental Health; D055593:Geological Phenomena; D005844:Geology; D008377:Maps as Topic; D008982:Molybdenum / Q000032:analysis; D010944:Plants / Q000378:metabolism; D011647:Puerto Rico; D012494:Sampling Studies; D012643:Selenium / Q000032:analysis; D012987:Soil / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis* / Q000378:metabolism / Q000506:poisoning; D014481:United States; D014887:Weather
D012987:Soil; D014131:Trace Elements; D003035:Cobalt; D008982:Molybdenum; D012643:Selenium