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AVALIAÇÃO QUÍMICA DE CORRETIVOS DE ACIDEZ PARA FINS AGRÍCOLAS: UMA NOVA PROPOSIÇÃO

J.C. ALCARDE A.A. RODELLA About the authors

The effects of particle size on the determination of the neutralizing value, calcium and magnesium, were studied for agricultural liming materials. An alternative and simplified procedure is suggested for the chemical evaluation of amendments, based on: (1) the use of ground samples passed through sieve number 100-ABNT, (2) the determination of the neutralizing value by titration with an indicator using a diluted extract, and (3) the determination of calcium and magnesium in the same extract used for the determination of the neutralizing value. These procedures simplify the analytical methodology for evaluation of agricultural liming materials, and allow a more suitable agronomic interpretation.

agricultural liming materials; chemical evaluation; simplified procedures; PRNT


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