TY  - SER
AU  - Silva,A.A.P.
AU  - Oliveira Neto,A.M.
AU  - Naiara,G.
AU  - Karpinski,R.A.K.
AU  - Maciel,C.D.G.
TI  - Weed interference periods in early wheat in the midwest of Paraná
KW  - TRIGO
KW  - ERVA DANINHA
KW  - PRODUTIVIDADE
ER  -