Can Leguminous Cover Crops Partially Replace Nitrogen Fertilization in Mississippi Delta Cotton Production?

Table 1

Effect of cover crop on plant residues remaining on soil surface at various times in 2005, 2006 and 2007. ^a

Cover crop	Plant residue dry weight, kg/ha
	Sampling date
	April 15, 2005	April 24, 2005	May 23, 2005
None	3865 b	2584 b	1179 b
Austrian winter pea	7479 a	7286 a	2228 a
Hairy vetch	7532 a	6485 a	2292 a
	April 10, 2006	April 27, 2006	May 16, 2006
None	1969 c	1246 b	Not detectable
Austrian winter pea	5704 a	3737 a	2056 a
Hairy vetch	4070 b	3336 a	751 b
	April 03, 2007	April 30, 2007
None	5062 b	1474 c
Austrian winter pea	9025 a	3368 b
Hairy vetch	8724 a	4193 a

^aMeans followed by the same letter within a column for the same sampling date do not differ at the 95% confidence level.