Teores de metais pesados no solo e em girassol adubado com lodo de esgoto by Altina L. Nascimento, Regynaldo A. Sampaio, Geraldo R. Zuba Junio, João P. Carneiro, Luiz A. Fernandes, Márcio N. Rodrigues

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Chemical characterization of vermicompost of sewage sludge with different proportions of diatomaceous material by Fabíola M. Braga, Paulo H. S. Cardoso, Mário H. C. Barbosa, Márcio N. Rodrigues, Regynaldo A. Sampaio, Luiz A. Fernandes

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Yield of castor bean fertilized with sewage sludge and potassium and magnesium sulphate by Thâmara F. M. Cavalcanti, Geraldo R. Zuba, Regynaldo A. Sampaio, João P. Carneiro, Ely S. A. de Oliveira, Márcio N. Rodrigues

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Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods by Ely S. A. de Oliveira, Paulo H. S. Cardoso, Izabelle de P. Sousa, Anarelly C. Alvarenga, Márcio N. Rodrigues, Regynaldo A. Sampaio

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