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

Table 5

Interaction of cover crop and N rate on soil nitrate present at planting in 2005, 2006, and 2007.

Year	N applied	Cover crop
	kg/ha	None	Austrian winter pea	Hairy vetch
		mg NO3-N/kg soil
2005	0	20	21	21
	67	21	22	22
	134	21	21	21
2006	0	27	31	27
	67	31	55	39
	134	34	98	51
2007	0	38	45	42
	67	44	63	55
	136	51	107	62
LSD0.05 year × cover crop × N			5