REPRODUCTION OF WESTERN YELLOW PINE. 43 



Table 11. — Relation of cultivation, shade, and Utter to germdtiation and survival. 

 Sample Plot 1b, Fort Valley, Old Cutting, Closely Grazed by Horses. 





Number of seedlings per square foot. 



Survival per cent. 





Sun. 



Shade.iOto 

 25 feet. 



Sun. 



Shade, to 



Date of examination. 



to 25 feet .2 



Over 25 feet. 



to 25 feet. 



Over 25 feet. 



25 feet. 





Nat- 

 ural. 



Culti- 



vat- 

 ed.3 



Nat- 

 ural. 



Culti- 

 vat- 

 ed. 



Nat- 

 ural. 



Culti- 

 vat- 

 ed. 



Nat- 

 ural. 



Culti- 

 vat- 

 ed. 



Nat- 

 ural. 



Culti- 

 vat- 

 ed. 



Nat- 

 ural. 



Culti- 

 vat- 

 ed. 



Sept. 1,1919 



1.92 

 .86 

 .22 

 .22 

 .14 

 .07 



t., 192 



1.09 

 .44 

 .15 

 .12 

 .06 

 .04 



1.04 

 .84 

 .49 

 .45 

 .42 

 .31 



0.65 

 .45 

 .30 

 .16 

 .14 

 .10 



3.51 

 1.30 

 .35 

 .32 

 .26 

 .23 



5.90 

 1.83 

 .73 

 .70 

 .64 

 .59 















Junel, 1920 



0.44 

 .26 



1.00 

 .64 

 .50 



3.6 



6.40 

 .34 

 .80 

 .50 

 .67 



3.7 



0.81 



.58 

 .92 

 .93 

 .74 



29.8 



0.69 



.67 

 .53 

 .88 

 .71 



15.4 



0.37 



.27 

 .91 



.81 



.88 



6.6 



0.31 



Aug. 1, 1920 



.40 



Nov. 15, 1920 



.96 



May 20, 1921 



.91 



Sept. 1, 1921 



.92 



Survival, Sept., 1919, to Sep 



10.0 





1 1 









Sample Plot 3a, Forest Service Cutting, no Grazing; Tall, Dense Bunch-grass. 



Sept. 1,1919.. 

 Mar. 26, 1920. 

 Aug. 5, 1920.. 

 Nov. 11, 1920. 

 May ^5, 1921.. 

 Sept. 1, 1921.. 



3.01 

 1.49 



.48 

 .40 

 .39 

 .33 



1.10 

 .50 

 .21 

 .16 

 .16 

 .14 



0.77 

 .38 

 .18 

 .14 

 .12 



Survival, Sept., 1919, to Sept., 1921 11.0 7.6 12.7 10.4 13.3 19.7 



4.52 

 1.56 

 .77 

 .68 

 .67 

 .60 



8.56 

 3.30 

 2.12 

 1.88 

 1.85 

 1.69 



0.50 

 .32 



.83 



0.54 

 .32 

 .72 



1.00 

 .61 



0.45 

 .42 

 .76 



1.00 



0.49 

 .47 



.78 

 .86 

 .67 



0.35 

 .49 



.90 



0.39 

 .64 



.99 

 .91 



Sample Plot 3b, Forest Service Cutting, No Grazing; Tall, Dense Bunch-grass. 



Sept. 1.1919.. 

 May 20, 1920.. 

 Aug. 13, 1920. 

 Nov. 12, 1920. 

 May 15, 1921.. 

 Sept. 1, 1921.. 



Survival, Sept., 1919, to Sept., 1921 



1.88 

 1.19 



1.00 

 .74 



0.94 

 .53 



0.71 

 .34 



4.33 

 2.29 



6.53 

 3.38 















0.63 



0.74 



0.56 



0.48 



0.53 





.24 



.28 



.16 



.15 



.54 



.86 



.20 



.38 



.30 



.44 



.24 





.21 



.22 



.16 



.11 



.44 



.81 



.88 



.79 



1.00 



.73 



.81 





.18 



.18 



.13 



.10 



.34 



.62 



.86 



.82 



.81. 



.91 



.77 





.13 



.12 



.09 



.08 



.22 



.43 



.72 



.67 



.69 



.80 



.65 





t., 192 













6.9 



12.0 



9.6 



11.3 



5.1 





















0.52 

 .25 

 .94 



.77 

 .69 



6.6 



1 Plots shaded by trees one-half or more of the day are classed as shaded. Such plots also have con- 

 siderable leaf litter. 



* Distance from seed trees. All of the shaded plots are within 25 feet of trees while those in the sun are in 

 many cases farther away. 



» Cultivated with a mattock to a depth of 6 to 8 inches in 1914, removing all vegetation including roots as 

 far as possible. 



