TY  - SER
AU  - Silva,A.A.P.
AU  - Oliveira neto,A.M.
AU  - Guerra,N.
AU  - Helvig,E.O.
AU  - Maciel,C.D.G.
TI  - Interference periods among weeds and soybeanh RR crops in the western center area of the brazilian state of Paraná
KW  - SOJA
KW  - GLYCINE MAX
KW  - ERVA DANINHA
KW  - COMPETIÇÃO DE VARIEDADE
KW  - HERBICIDA
ER  -