The study used a randomized block design experimental method, with five treatments and three times
replications. Treatment consisted of five difference weed control methods namely: A = manual weeding, B = UN weed
control, C = herbicide containing Penoxulam + Cyhalofop-butyl, D = herbicide containing Bispyribac sodium, and E =
herbicide containing 2, 4 D + Methyl metsulfuron. All treatment was done at age 20 day after planting (DAP), except
the manual weeding which was done at the age 20 and 45 DAP. Each plot has an area of 4 m x 5 m, with a spacing of
35 cm x 35 cm.