Tillage Effects on Soil Biochemical Properties and Maize Grown in Latosolic Red Soil of Southern China

Table 4

Effects of tillage practices on maize yield component in two years.

Year	Treatments	Dry matter (ton·ha^−1)	1000-grain weight (g)	Grain yield (ton·ha^−1)	Harvest index (%)
2016	2RT	18.78 b	283.70 b	7.11 b	37.89 a
	2RTSS	18.39 c	277.11 b	6.92 b	37.58 a
	SS	19.21 a	297.41 a	7.34 a	38.22 a
	ZT	17.87 d	270.14 c	6.70 c	37.48 a
2017	2RT	18.79 b	288.41 b	7.17 b	38.17 a
	2RTSS	18.53 c	281.54 c	7.02 b	37.87 a
	SS	19.21 a	302.35 a	7.40 a	38.50 a
	ZT	17.85 d	272.22 d	6.75 c	37.80 a

Values within a column in the same year followed by the same letters are not significantly different (). 2RT: two passes of rotary tillage; 2RTSS: two passes of rotary tillage + subsoiling; SS: subsoiling; ZT: zero tillage.