Dynamics of Mean-Variance-Skewness of Cumulative Crop Yield Impact Temporal Yield Variance

Table 1

Simple bivariate correlation coefficients between mean-variance-skewness in two cropping systems and three subsystem clusters of these systems.

Cropping system/cluster	Statistic mean/variance	Variance	Skewness
Conventional	Mean	0.90^***†	−0.89***
	variance		−0.74**
Organic	Mean	0.57*	−0.83***
	variance		−0.33*
Cluster 1	Mean	0.90***	−0.89***
	Variance		−0.72***
Cluster 2	Mean	0.37*	−0.58**
	variance		−0.44*
Cluster 3	Mean	0.65**	−0.86***
	variance		−0.59**

^†Correlation coefficients followed by *, **, *** are significantly different at the 5, 1, and 0.1% level of probability, respectively.