Effect of Row Spacing and Frequency of Weeding on Weed Infestation, Yield Components, and Yield of Rice (Oryza sativa L.) in Bench Maji Zone, Southwestern Ethiopia

Table 3

Main effect of row spacing and weeding frequencies of rice on weed control efficiency (%) and weed index (%) at Kuja in 2020 main cropping season.

Treatments	Weed control efficiency	Weed index
Row spacing
30 cm	74.77^a	28.99^a
25 cm	75.33^a	23.31^ab
20 cm	76.89^a	21.24^b
LSD (0.05)	NS	5.94
Weeding frequencies
One-hand weeding and hoeing at 2 WAE	83.67^b	22.98^bc
One-hand weeding and hoeing at 3 WAE	85.84^b	16.66^cd
One-hand weeding and hoeing at 4 WAE	87.75^b	27.52^b
Two-hand weeding and hoeing at 2 and 5 WAE	96.70^a	9.19^d
Weed-free check	100.00^a	0.00^e
Weedy check	0.00^c	70.72^a
LSD (0.05)	6.60	8.40
CV (%)	9.10	35.75

CV = coefficient of variation; LSD = least significant difference; WAE = weeks after crop emergence; means in columns of the same parameter followed by the same letter(s) are not significantly different at a 5% level of significance.