Cover Crop Biomass Harvest Influences Cotton Nitrogen Utilization and Productivity

Table 2

Analysis of variance for the effect of year, rye residue management, and N fertilization on leaf  N concentration at early bloom, cotton biomass, cotton biomass N concentration and N uptake between first square and cutout, and seed cotton yield. 𝑃 values within a row in bold are significant at 𝛼≤0.05.

Effect	Leaf  N concentration^†	Cotton biomass^‡	Cotton biomass N concentration^‡	N uptake^‡	Seed cotton yield
	𝑃>𝐹
Year	≤0.01	0.04	≤0.01	≤0.01	≤0.01
RM^δ	0.03	≤0.01	≤0.01	0.63	≤0.01
N	≤0.01	≤0.01	≤0.01	≤0.01	≤0.01
Year*RM	0.23	0.95	0.30	0.79	≤0.01
Year*N	0.57	0.02	0.15	≤0.01	≤0.01
RM*N	0.76	0.07	0.82	0.05	0.02
Year*RM*N	0.16	0.99	0.45	0.83	≤0.01

^†At early bloom.
^‡Between first square and cutout.
^δRM: rye residue management.
N: nitrogen.