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Acid‐Extractable Zinc of Soils in Relation to the Occurrence of Zinc‐Deficiency Symptoms of Corn: a Method of Analysis
Author(s) -
Wear John I.,
Sommer Anna L.
Publication year - 1948
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1948.036159950012000c0031x
Subject(s) - chemist , soil water , zinc , relation (database) , citation , chemistry , library science , environmental science , computer science , soil science , data mining , organic chemistry
tions of zinc salts indicate that it would be desirable to develop a method of zinc analysis whereby the need of soils for such fertilization might be predicted. The method herein described was devised with this in mind. The method of extraction and analysis (dithizone) adopted was a combination and modification of methods already in use. One hundred ml of O.iN HC1 with a shorter period of extraction was substituted for the 400 ml of O.O4N acetic acid of Hibbard and other investigators. The procedure of Alexander and Taylor for flocculation and precipitation of difficulty soluble sulfides was modified in that the first filtration was not made until after treatments with H2S. With these modifications, -a series of determinations may be completed within a working day.