Souza, J.I. Silva, A.A.P. Chagas, R.R. Oliveira Neto, A.M. Maciel, C.D.G. Resende, J.T.V. Ono, E.O. <br/><br/>
Weed interference periods and transplanting densities of onion crop in the brazilian region of Guarapuava, PR 

<br/><br/><label>Subjects--Topical Terms: </label><br/>CEBOLA<br/>COMPETIÇÃO DE VARIEDADE<br/>ERVA DANINHA