. 2015 Apr 16;10(4):e0120994. doi: 10.1371/journal.pone.0120994

Table 5. Grain yields and harvest indexes under different wheat straw incorporation treatments from 2008 to 2011.

Treatments	Grain yield (kg hm^-2)				Harvest Index
Treatments	2008	2009	2010	2011	2008	2009	2010	2011
H	4524a ¹	4868a	4743a	4118a	0.40a	0.39a	0.40a	0.39a
M	4475a	47076a	4591a	3726b	0.41a	0.39a	0.39a	0.38a
L	4051b	4099b	3986b	3295c	0.40a	0.38ab	0.38ab	0.37b
CK	3792c	3846c	3693c	3071d	0.40a	0.37b	0.38b	0.37b

Note: CK, no straw incorporation; L, incorporation of straw at a low rate of 3 000 kg hm^-2 wheat straw; M, incorporation of straw at a medium rate of 6 000 kg hm^-2 wheat straw; H, incorporation of straw at a high rate of 9 000 kg hm^-2 wheat straw.

¹ Values within a column for the same year followed by different letters are significantly different (P<0.05)