بررسی اﺛﺮات ﺳﻄﻮح ﺗﺮاﮐﻢ ﺑﻮﺗﻪ و ﮐﻨﺘﺮل ﻋﻠﻔﻬﺎی ﻫﺮز ﺑﺮ ﻋﻤﻠﮑﺮد و اﺟﺰای ﻋﻤﻠﮑﺮد ارﻗﺎم ذرت

Effect of plant density and weed control on yield and yield components of maize varieties