[Retracted] Effects of Different Soil Modifiers on Salt Improvement and Distribution, Crop Growth of the Gully Land Consolidation on Loess Plateau

Table 5

The effects of different soil modifiers on maize grain yield.

Year	2019			2020
Plot	1000-grain weigh/(g)	Yield/(kg·ha^−1)	Increase over control/(%)	1000-grain weigh/(g)	Yield/(kg·ha^−1)	Increase over control/(%)
CK	^d	^c	-	^e	^d	-
MS	^b	^b	13.63	^d	^c	18.42
YK	^c	^b	13.76	^b	^c	16.65
HA	^c	^b	15.01	^c	^b	23.31
HK	^b	^a	21.12	^a	^a	29.68
NB	^a	^a	23.84	^a	^a	31.84

Note: Data in the table are . Different letters in the same column represent significant differences between different treatments at the 0.05 level (Duncan’s method). indicates that there is a very significant correlation between experimental factors and results ().