Quality Evaluation of Three Kinds of Hickories Based on Grey Relational Analysis and Entropy-Weight Theory

Table 1

Laying data of samples.

Variety		Big seeds	Medium seeds	Small seeds	Sum
Linan hickory	Quantity	316	1630	730	2676
	Proportion	11.81%	60.91%	27.28%
Hunan hickory	Quantity	153	458	769	1380
	Proportion	11.09%	3319%	55.72%
U.S. hickory	Quantity	147	1346	273	1766
	Proportion	8.32%	76.22%	15.46%

Seed is classification by its weight. For Linan hickory, big seed >4.2 g, medium one (2.5, 4.2), and small one <2.5. For Hunan hickory, big one >10 g, medium one (7.14, 10), and small one <7.14. For American hickory, more than big one ≥ 6.5 g, medium one (4.3, 6.5), and small one <4.3.