International Journal of Agronomy

Research Article

Assessing the Economic Impact of Inversion Tillage, Cover Crops, and Herbicide Regimes in Palmer Amaranth (Amaranthus palmeri) Infested Cotton

Table 7

Influence of tillage system by herbicide interaction on net returns (US ha⁻¹) by year.


Tillage system treatment	Herbicide regime
	PRE	POST	PRE+POST	LSD ()
	US ha⁻¹

2009
Noninversion	132	123	529	274
Inversion	546	1062	1111
LSD ()	⁢325

2010
Noninversion	836	612	699	173
Inversion	674	690	824
LSD ()	⁢NS

2011
Noninversion	1708	1602	1641	NS
Inversion	1445	1571	1594
LSD ()	⁢NS

The inversion tillage (IT) treatment consisted of one pass with a moldboard plow immediately followed by one pass with a disk and one pass with a cultivator in fall 2008. In 2010 and 2011, the IT plots were managed the same as the noninversion (NIT) plots. The IT and NIT plots were subsoiled each spring prior to planting.
LSD (least significant difference) for comparing any two means within tillage treatment. NS is not significant.
LSD for comparing any two means within herbicide regime and across tillage and herbicide regime.