Cover Crop Biomass Harvest Influences Cotton Nitrogen Utilization and Productivity

Table 3

Effects of rye residue management and N fertilization on cotton biomass production and cotton biomass N concentration between first square and cutout, averaged across years.

N rates	Cotton biomass			Cotton biomass N concentration
	NC^†	REM	RET	NC	REM	RET
kg ha^−1	kg ha^−1			g ha^−1
0	3,620	4,190	5,281	9.8	7.9	7.3
50	5,430	6,060	7,684	11.4	10.1	9.4
100	6,371	7,034	8,365	15.0	13.9	12.7
140	5,954	7,468	9,258	16.7	15.4	14.3

^†NC: no winter cover crop.
REM: rye residue removed.
RET: rye residue retained.