Increased Yield Surplus of Vetch-Wheat Rotations under Drought in a Mediterranean Environment

Table 2

Mean values of grain and straw yields, grain yield components, and N concentrations in the plant parts harvested after the first year of experimentation. Values followed by the same letter do not show statistically significant differences between treatments at 𝑃<0.05.

	“Cnvl”	“Strw”	“Sldg”
Grain production (t ha^−1)	5.60 a	4.02 b	6.03 a
Volume weight (g l^−1)	79.8 a	79.7 a	79.1 a
1000-kernel weight (g)	61.5 a	61 ab	58 b
Spike number (m^−2)	213.9 a	198.3 a	232.9 a
Straw production (t ha^−1)	6.7 a	5.5 b	7.8 a
N in grain (kg ha^−1)	123.4 a	82.1 b	139.5 a
N in straw (kg ha^−1)	25.9 a	22 a	38 b
Total N in plant (kg ha^−1)	149.3 a	104.1 b	177.5 a