Effects of the application of sewage sludge and petrochemical residue in maize culture as source of micro-nutrients on soils of Paraná state von Pigozzo, Ana T. Jordão(State University of Maringá Chemistry Department), Gobbi, Marlene A.(State University of Maringá Chemistry Department), Lenzi, Ervim(State University of Maringá Chemistry Department), Luchese, Eduardo B.(State University of Maringá Chemistry Department)

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Effects of the application of sewage sludge and fowl manure on soils of Paraná state in maize plants (Zea mays L.) as a macro-nutrients source von Gobbi, Marlene A.(State University of Maringá Department of Chemistry), Pigozzo, Ana T. Jordão(State University of Maringá Department of Chemistry), Lenzi, Ervim(State University of Maringá Department of Chemistry), Luchese, Eduardo B.(State University of Maringá Department of Chemistry)

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