info:oai:icrisat:1488info:ofi/fmt:xml:xsd:journalSahrawatK LSahrawat, K LKumarG RKumar, G RRaoJ KRao, J KEvaluation of triacid and dry ashing procedures for determining potassium, calcium, magnesium, iron, zinc, manganese, and copper in plant materialsCommunications in Soil Science and Plant Analysis20023395-1021-2article