Table 2.

Relay intercropping treatment main effect means of pre-grazing (mid-April) biomass dry matter (DM) yield, crude protein concentration, and 48-h in vitro dry matter disappearance (48-h IVDMD) of sweet maize stover intercropped with rye or hairy vetch and the overseeded forage species over three years at Alcalde, NM, USA ¹.

Year	Biomass, Mg DM ha−1		Crude Protein, g kg−1		48-h IVDMD, g kg−1 2
	Whole Plant Sweet Maize Stover	Over-Seeded Forage	Whole Plant Sweet Maize Stover	Over-Seeded Forage	Whole Plant Sweet Maize Stover	Over-Seeded Forage
1	1.97	1.85	108	176	-----	-----
2	1.78	2.78	97	167	578 3,a	497 b
3	1.97	1.97	124	179	531 b	569 a
SED 4	0.27	0.50	10	11	14	18
Intercropping Treatment Effect (I)
Maize–rye	2.02	1.46	110	154	556	548
Maize–vetch	1.79	2.94	110	193	554	518
SED	0.10	0.29	5	6	9	18
p -Values
Year	0.7264	0.2080	0.0940	0.5947	0.0292	0.0041
I	0.0668	0.0024	0.9844	0.0007	0.8926	0.1296
Year × I	0.3970	0.0142	0.9242	0.3386	0.8661	0.0358

¹ Values in the table are the lsmeans of three replicates for each component of the year × intercropping treatment (Y × I) interaction; ² The statistical analysis and results for 48-h IVDMD only includes two years of data; ³ Year lsmeans in the same column followed by the same letter are not significantly different at the 5% alpha level; ⁴ Standard error of the difference between lsmeans.