1. Resistance to disease and insect pests 2 points

2. Bearing habits over the given period; annual, biennial,

occasional 7 points

3. Length of growing season; rate of growth; time of

blossoming (staminate and pistillate flowers), time of

leafing out, time of nut ripening, time of leaf fall 4 points

4. Size of nut clusters, range in number of nuts, per

cluster, number of pounds of immature nuts 2 points

Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 · 第 152 / 315 题