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

Table 3

Yearly estimates of total biological N fixed in above ground legume cover crop biomass before desiccation in 2005–2007.

Cover crop	Total N2 fixed, kg//ha
	2005	2006	2007
Austrian winter pea
0 N	92	124	146
67 N, kg/ha	149	117	178
134 N, kg/ha	151	114	177
Hairy vetch
0 N	96	68	165
67 N, kg/ha	103	109	161
134 N, kg/ha	67	85	133
LSD0.05 year × cover crop × N		43