Table 4.

Correlation analysis between yield and the different ingredients

	Xa1	Xa2	Xa3	Xa4	Xa5
Yieldb
Pearson	0.084	0.665**	0.112	− 0.706**	− 0.145
Significance	0.767	0.008	0.692	0.003	0.607
N	21	21	21	21	21

^aNotes are the same as Table 1

^bMean values followed by no letters are not significantly different at a level of 5% (P < 0.05)

** Significantly different at a level of 1% (P<0.01)