
Keywords: توزیع ریشه عمودی; MP; Moldboard plough; NT; No-till; 0 P, 05 P and 1 P; P fertilization rates of 0 17.5 and 35 kg P haâ1 applied every two years on corn phase; RMD; Root mass density (cm cmâ3); RSD; Root surface density (cm2 cmâ3); RLD; Root length density (cm