Doses and Timing of 2, 4-D Application for Broadleaf Weed Control, Botanical Compositions, Productivity, and Nutritive Value of Natural Pasture
Table 8
Effect of dose and time of application of 2, 4-D herbicide on plant height (cm) of natural pasture forage portions and weeds.
Factors (2, 4-D herbicide doses and time of application)
Grasses + legumes
Weeds
1st year
2nd year
Mean
1st year
2nd year
Mean
Doses
0 Lha−1 (control)
63.67
85.45
74.56
40.00
66.63
53.32
1 Lha−1
65.61
88.61
77.11
31.00
76.86
53.93
1.5 Lha−1
68.83
88.05
78.44
28.56
72.60
50.58
2 Lha−1
71.06
86.37
78.26
31.67
70.00
49.71
-value
0.57
0.78
0.92
0.08
0.64
0.95
Time
Control
63.67
85.45
74.56
40.00
66.63
53.32
Mid-July
69.22
88.16
78.69
28.67
75.00
51.83
Early August
65.28
87.96
76.62
30.33
73.71
52.02
Mid-August
71.00
86.98
78.52
32.22
70.84
50.39
-value
0.53
0.89
0.89
0.07
0.79
0.99
R T
ns
ns
ns
ns
ns
ns
Mean
68.02
87.49
77.82
31.37
72.59
51.63
CV
14.46
6.57
16.79
19.68
18.83
47.94
1st year = 2019, 2nd year = 2020, CV = coefficient variation, R T = dose and time interaction, R T = dose and time interaction; grass + legume = the average result of grass and legume.
