Doses and Timing of 2, 4-D Application for Broadleaf Weed Control, Botanical Compositions, Productivity, and Nutritive Value of Natural Pasture

Table 9

Effect of dose and time of application of 2, 4-D herbicide on dry matter yield (t·ha⁻¹) of natural pasture forage species.

Treatments (2, 4-D herbicide doses and application time)	Grasses			Legumes
	1^st year	2^nd year	Mean	1^st year	2^nd year	Mean
Control (no treatment)	3.80	2.21^d	3.01	1.17^ab	1.76^abc	1.46^ab
1 L·ha^−1 at early (mid-July)	3.16	4.57^abc	3.86	0.82^bc	0.90^de	0.86^bc
1 L·ha^−1 at mid (early-August)	3.50	4.70^abc	4.10	0.63^c	1.20^dc	0.92^abc
1 L·ha^−1 at late (mid-August)	2.77	2.62^cd	2.69	1.53^a	1.53^bcd	1.53^a
1.5 L·ha^−1 at early (mid-July)	3.46	3.09^bcd	3.28	0.92^bc	1.07^cde	0.99^abc
1.5 L·ha^−1 at mid (early-August)	3.61	2.77^cd	3.19	0.91^bc	1.96^ab	1.43^ab
1.5 L·ha^−1 at late (mid-August)	3.14	3.92^abcd	3.53	1.11^ab	1.16^cde	1.14^abc
2 L·ha^−1 at early (mid-July)	3.97	3.25^abcd	3.61	0.57^c	2.11^ab	1.34^ab
2 L·ha^−1 at mid (early-August)	3.20	4.97^ab	4.08	0.80^bc	2.27^a	1.54^a
2 L·ha^−1 at late (mid-August)	2.97	5.27^a	3.89	0.77^bc	0.44^e	0.61^c
Mean	3.36	3.68	3.52	0.92	1.44	1.18
CV	19.97	28.95	29.73	30.50	29.76	46.23
-value	0.507	0.024	0.303	0.019	0.0007	0.0428

1^st year = 2019, 2^nd year = 2020, CV = coefficient variation. Means with different letters are significantly different.