Table 6.

Parameters used in the curve simulating density-relative grain yields for various maize varieties.

Varieties	Parameter			−c/lnb	SD	R 2
	a	b	c
ZD958	0.5903	0.9272	0.6474	8.5623	0.0905	0.8046**
XY335	0.4921	0.9138	0.8044	8.9289	0.0622	0.9398**
DH661	0.3939	0.8937	1.0463	9.3089	0.1419	0.8362**
YN103	0.5525	0.9025	0.8249	8.0448	0.0533	0.9615**
ZD808	0.5754	0.8813	0.7797	6.1722	0.1095	0.7871**

**Significant at the 0.01 probability level.