FORESTRY QUARTERLY 



Vol. XII. ] September, 1914. [No. 3. 



RESULTS OF AX EXPERIMENT ON THE EFFECT OF 



DRYING OF THE ROOTS OF SEEDLINGS OF 



RED AND WHITE PINE. 



By Ferdinand W. Haasis. 



The following experiment was conducted on the lands of the 

 Northeastern Forestry Company at Cheshire, Connecticut. It 

 was made possible through the kindness of the Superintendent, 

 Mr. F. S. Baker, in supplying material and ground. 



The object was to determine to what extent seedlings would 

 recover after having had the roots exposed to sun and wind. A 

 slight amount of exposure is inevitable in the lifting, bundling, 

 packing and transplanting. The question was : will the plants re- 

 cover after exposure for hours, or is exposure for minutes fatal ? 



The chief factors influencing the result, are : 



1. The sun's altitude. 



2. The latitude. 



3. The absolute and relative altitudes and the locality. 



4. The time of day. 



5. The cloudiness and place of exposure. 



6. The temperature. 



7. The humidity. 



8. The precipitation. 



9. The direction and velocity of the wind. 



10. The treatment after exposure. 



11. The species. 



12. The age and character of the material. 



13. The soil in which planted after exposure. 



14. The weather after transplanting. 



^- As to the sun's altitude, only one experiment was conducted, 

 ^ beginning on April 19th the following table (taken from P. N. 



