199 1.8 49 19 22 4.8 25 3.0 4 200 1.7 24 17 16 3.3 19 2.0 3 201 10.9 100 17 19 3.8 22 2.2 3 202 0.4 46 21 14 4.1 20 1.0 3 203 4.3 97 18 23 4.4 25 3.1 3 205 6.4 19 11 22 2.6 23 4.0 1
206 4.2 98 19 12 2.7 15 2.2 3 207 0.7 21 17 15 2.8 16 2.0 2 208 1.1 66 16 22 3.8 24 2.4 3 210 4.8 98 17 14 3.2 19 0.7 3 211 0.3 83 11 11 1.6 15 0.2 3 214 3.0 87 18 16 3.1 17 2.7 3
215 0.9 100 13 18 2.7 20 0.7 3 216 0.7 97 11 13 1.7 16 0.6 4 217 12.1 93 18 21 4.4 25 0.8 3 218 1.7 100 18 17 3.0 17 2.6 2 219 2.5 94 11 17 2.0 18 0.8 3 220 0.8 61 20 13 3.2 16 1.9 3
221 0.4 53 16 20 3.4 21 3.2 2 222 1.3 72 16 16 3.0 18 1.9 3 223 0.8 55 12 19 2.6 20 0.5 3 224 4.9 93 17 16 3.5 20 1.1 3 225 7.8 94 15 18 3.4 22 1.0 3 226 9.8 96 12 12 1.9 16 0.2 3
227 4.2 99 16 19 3.6 23 0.7 3 228 1.1 99 15 21 3.3 22 2.3 3 231 7.3 52 10 17 2.3 19 1.1 3 232 26.6 98 19 17 4.5 24 2.0 3 236 10.5 26 15 17 3.0 19 0.5 2 237 16.1 100 18 14 3.5 19 1.5 3
240 1.2 100 14 15 2.5 17 0.9 3 241 4.6 96 14 15 2.3 16 1.2 3 242 1.4 98 13 17 2.5 20 0.7 3 243 4.9 98 14 12 2.0 14 1.3 3 246 29.6 98 14 16 2.9 21 0.7 3 247 1.2 23 15 12 1.7 15 0.2 3
Results of cracking tests show that, in general, cracking quality of nut samples from the trees in this study is poor. When cracked, the kernels crumble badly, making extraction difficult and quarter recovery low. Variation in cracking quality can be seen by studying the values in Table 1. Nuts from trees 28 and 136 were extremely small, averaging 9 and 10 grams, respectively. Nuts from trees 61 and 98 had generally poor characteristics. Trees bearing walnuts of better-than-average quality are trees 5 and 18 with high total kernel per cent, and trees 8, 16, and 59 with high nut weight and an unusually high kernel weight. Other trees, of interest as exceptional bearers, include tree 101 with large nut weight, and tree 117 with both exceptional nut and kernel weight. The outstanding tree in the study from the standpoint of cracking quality of the nuts is tree 13, which has exhibited those characteristics of thinness of shell and high kernel content sought for in improved varieties. This black walnut selection is being propagated at the Norris Nursery under the appropriate name of Norris.[14]
[Footnote 14: Kline, L. V. A method of evaluating the nuts of black walnut varieties. Proc. Amer. Soc. Hort. Sci. 41:136-144. 1942.]
Results from this study on the common black walnut have application in the evaluation of the relative yield and nut quality of improved selections suitable for use in the Tennessee Valley. This summary should also prove of value to other workers dealing with black walnut in other regions. It provides a basis for comparison, brings out the possibilities for making selections, and emphasizes the importance of nut production from improved varieties.
The 1946 Field Tour