International Scholarly Research Notices

Research Article

Influence of Soybean (Glycine max) Population and Herbicide Program on Palmer Amaranth (Amaranthus palmeri) Control, Soybean Yield, and Economic Return

Table 11

Soybean yield and estimated economic return as influenced by herbicide resistance trait, soybean plant population, and postemergence herbicide treatment during 2011 in Fields B13 and C11.^a


Soybean population^b	Post herbicide^c	Soybean yield				Economic return
		Herbicide resistance trait				Herbicide resistance trait
		Field B13		Field C11		Field B13		Field C11
		Glufosinate	Glyphosate	Glufosinate	Glyphosate	Glufosinate	Glyphosate	Glufosinate	Glyphosate
		kg ha⁻¹				$ ha⁻¹

Low	No	1420c	540c	2860c	1980c	224c	⁻237c	924c	481c
Low	Yes	2180b	2290b	3790b	3620b	544b	601b	1326b	1263ab
High	No	2240b	2680b	3620b	3580b	507bc	705b	1201b	1153b
High	Yes	3720a	3850a	4560a	4150a	1195a	1255a	1625a	1408a

^aMeans within a column followed by the same letter are not significantly different according to Fisher’s Protected LSD test at P < 0.05. Data are pooled over preemergence herbicides.
^bLow soybean populations in Fields B13 and C11 during 2011 was 221,000 and 208,000 plants m⁻², respectively. High soybean populations in these fields were 560,000 and 519,000 plants m⁻², respectively.
^cGlufosinate and glyphosate applied to appropriate herbicide-resistant cultivar at 560 and 840 g ha⁻¹, respectively.