10 



BULLETIN 1112, U. S. DEPARTMENT OF AGEICULTURE. 



Table 7. — Basic data for 107 felled trees showing the effect of mistletoe on the growth and 

 seed production of western yellow pine — Continued. 



Tree number. 



Age. 



Diam- 

 eter 

 breast 

 high. 



Diame- 

 ter 

 growth 

 for last 



Total 

 height. 



Height 

 growth 

 for last 

 5 years- 



Total 

 vol- 

 ume. 



Volume 

 growth 

 for last 

 5 years. 



De- 

 gree 

 of 



infec- 



Crown 

 class. 



Aver- 

 age 

 length 

 of 



Aver- 

 age 

 length 

 of leaf 



5 years. 







tion. 





leaves. 



tufts. 



Inch. 



Fed. 



Feet. 



Cu.ft. 



Cu.ft. 







Inch. 



Inch. 



0.1 



22.5 



1.0 



2.30 



1.80 



xxx 



C 



3.1 



3.3 



.4 



36.0 



1.0 



5.65 



1.01 



X 



X 



4.5 



6.5 



1.5 



40.5 

 41.5 



1.0 



.5 



15.18 

 20. 03 



4.40 

 .67 





 XXX 



X 

 X 







.2 



4.6 



5.6 



.7 



39.0 



1.0 



7.80 



.77 



XXX 



C 



3.1 



4.6 



.1 



21.0 



1.0 



.84 



.16 



XXX 



s 



4.1 





.3 



42.5 



1.0 



16.37 



.42 



XXX 



c 



4.0 



6.0 



.5 



43.0 



1.0 



7.06 



.86 



X 



c 



4.6 



5.3 



1.5 



64.5 



6.0 



47.49 



6.48 



X 



X 



6.3 



11.3 



.2 



30.0 



.5 



4.23 



.28 



XXX 



D 



4.6 



3.6 



.2 



49.5 



1.0 



20.05 



1.08 



XXX 



C 



6.2 



6.5 



1.0 



64.5 



3.0 



52.44 



6.81 







C 



4.7 



6.3 



.5 



41.5 



1.6 



13. 13 



1.17 







X 



6.3 



6.1 



1.1 



73.0 



3.5 



63.47 



5.73 







C 



4.8 



6.7 



.6 



60.5 



1.5 



62.11 



4.30 



X 



c 



6.2 



7.2 



.8 



53.0 



3.0 



8.62 



.92 



XX 



c 



6.3 



6.6 



1.2 



62.0 



3.5 



18.82 



6.59 







c 



6.0 



10.6 



.6 



70.5 



1.0 



43.68 



1.64 



XX 



c 



4.3 



6.8 



1.0 



78.0 



3.0 



69.85 



6.05 







c 



5.1 



6.2 



.4 



67.0 



1.0 



42.59 



1.32 



XX 



c 



4.3 



3.6 



1.7 



79.5 



2.S 



83.56 



11.32 







c 



6.4 



6.8 



.8 



58.0 



1.0 



16.10 



1.09 



XXX 



c 



6.3 



6.6 



.1 



46.5 



.5 



21.86 



.58 



XXX 



X 



4.6 



6.1 



1.7 



68.5 



1.0 



67.68 



9.40 







X 



6.0 



9.0 



.4 



68.0 



1.0 



43. 33 



3.75 



XX 



c 



6.1 



6.0 



.3 



55.5 



.3 



42. 03 



1.49 



XXX 



X 



4.0 



2.5 



2.3 



79.5 



1.5 



92.78 



8.56 







D 



5.0 



8.3 



.2 



45.0 



.5 



25.23 



.82 



XXX 



D 



3.6 



2.5 



.4 



59.5 



.5 



50.01 



3.74 



X 



X 



5.1 



11.5 



1.2 



67.5 



1.5 



44.90 



4.27 







C 



5.6 



7.1 



1.4 



85.0 



1.0 



108. 80 



7.98 







D 



5.5 



5.3 



.5 



58.5 



1.0 



32.92 



2.62 



XXX 



X 



4.7 



8.3 



.4 



78.5 



.2 



59.68 



2.55 



XXX 



C 



3.5 





.5 



77.5 



1.5 



71.92 



2.63 







C 



5.3 



5.2 



1.3 



87.6 



1.0 



133. 67 



10.17 







X 



4.8 



5.8 



.1 



84.5 



.3 



54.91 



1.15 



XXX 



C 



5.0 



7.1 



.8 



87.5 



1.0 



90.26 



7.08 







D 



5.8 



7.3 



.4 



76.5 



.3 



107. 47 



2.88 



XXX 



X 



5.2 



8.8 



.2 



72.0 



.5 



65.10 



5.68 



XXX 



C 



4.5 



5.6 



Seed 

 crop, 

 1915. 



23. 

 91. 

 2.. 

 42. 

 76. 

 7... 

 56. 

 87. 

 28., 

 25. 

 66. 

 99. 

 12. 

 93. 

 95. 

 40. 

 39. 

 96. 

 94. 

 45. 

 97. 

 41. 

 27. 

 4.. 

 92. 

 3.. 

 50. 

 26. 

 16. 

 36. 

 102 

 33. 

 30. 

 100 

 101 

 31. 

 32. 

 34. 

 35. 



Years. 

 93 

 93 

 94 



94 

 94 

 95 

 95 

 97 

 98 

 100 

 ]00 

 102 

 104 

 104 

 105 

 106 

 U2 

 114 

 117 

 120 

 120 

 121 

 123 

 124 

 125 

 126 

 130 

 134 

 138 

 214 

 214 

 217 

 218 

 218 

 218 

 220 

 220 

 230 

 233 



Inch. 



6.8 



8.9 

 12.0 

 14.8 



9:8 



4.0 

 14.4 



9.0 

 18.1 



8.3 

 14.6 

 20.6 

 12.4 

 21.6 

 20.4 



9.4 

 11.6 

 18.8 

 20.4 

 19.4 

 22.4 

 11.9 

 17.6 

 20.2 

 17.1 

 20.3 

 23.4 

 18.2 

 20.2 

 19.2 

 23.0 

 15.2 

 18.2 

 20.8 

 25.6 

 16.0 

 21.6 

 25.6 

 17.6 



Figure 1 shows the graphic growth analysis diagram for tree No. 4, 

 a typical healthy western yellow pine, while Figure 2 shows the same 

 kind of a diagram for tree No. 27, which was heavily infected with 

 mistletoe. Both trees grew within a short distance of each other on 

 the same site; they were of practically the same age and both belonged 

 to the isolated crown class and the 101 to 140 year age class; there- 

 fore these factors can not be held accountable for the material falling 

 off in the increment of the heavily infected tree. The very marked 

 decrease in the rate of growth during the last 30 years, evidently due 

 to the parasitism of the mistletoe, is very clearly shown by the close- 

 ness of the last seven quinquennial lines near the outside of the cone 

 in Figm^e 2, which represents the growth of tree No. 27. 



A set of curves was drawn for each tree showing the relation of 

 age to diameter breast high, total height, and volume. This curving 

 eliminated the irregularities and irrelevant abnormahties occurring 

 in each tree. The data for the individual trees were then averaged 

 by a series of harmonized curves for each infection and 40-year age 



