OTIMIZAÇÃO DA ETAPA DE ISOLAMENTO DOS COMPOSTOS VOLÁTEIS DE MEL PARA ANÁLISE POR CROMATOGRAFIA GASOSA by Deborah H. M. BASTOS, Maria A. A. P. SILVA, Maria R. B. FRANCO

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Weed Interference Periods in Early Wheat in the Midwest of Paraná by A.A.P. SILVA, A.M. OLIVEIRA NETO, G. NAIARA, R.A.K. KARPINSKI, C.D.G. MACIEL

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Interference Periods of Weeds in Maize in No-Tillage and Conventional Systems at High Altitudes by E.O. HELVIG, K.K.G. PINHEIRO, A.C. DRANCA, A.A.P. SILVA, M.C. MENDES, C.D.G. MACIEL

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Selectivity of Herbicide Associations with Chemical Protector in the Treatment of Sweet Sorghum Hybrid Seeds by C.D.G. MACIEL, A.M. OLIVEIRA NETO, N. GUERRA, G.B. LEAL, A.A.P. SILVA, C.R.B. SOARES, R.A.K. KARPINSKI

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