TY - SER AU - Echer,M.M. AU - Dalastra,G.M. AU - Hachmann,T.L. AU - Klosowski,E.S. AU - Guimarães,V.F. TI - Agronomic performances of Pak Choi grown with different soil cover KW - ANÁLISE DO SOLO KW - COBERTURA DO SOLO KW - POLIETILENO ER -