Germination of Forest Trees 



29 



Minimum Soil Moisture Content in Soil Moisture Cultures 



Date 



Depth, 

 Cm. 



Dry Culture, 

 Per Cent 



Medium Wet 

 Culture, 

 Per Cent 



Wet Culture, 

 Per Cent 



II/4- . 



II/7- . 

 Il/ll . 

 II/14. 

 Il/2I . 

 II/28. 

 12/5. 

 I2/I2 . . 

 12/ig. 

 12/26 . . 

 1/2.. 



1/9-.. 

 1/16. . 



1/23- 

 1/30. . 

 2/6. . . 



2/13. 

 2/20. . 

 2/27. . 

 3/6... 

 3/i3- 

 3/20. . 



3/27- 

 4/3 .- - 

 4/10. . 



4/17- 

 4/24. . 



o-5 

 0-5 

 0-5 

 0-5 

 o-5 

 0-5 

 0-5 

 0-5 

 o-5 

 0-9 

 0-9 

 o-5 

 0-5 

 0-5 

 o-5 

 0-9 



0-5 

 o-5 

 o-5 

 0-5 

 0-5 

 o-5 

 0-5 

 0-5 

 o-5 

 o-5 

 o-5 



10.5 



13-7 

 5-0 

 14.1 

 17. 1 

 13-8 

 12.4 

 16.6 

 12. 1 



9-4 

 11. 8 



15-7 

 12.5 



6-3 



7-i 



12.4- 



1 



13-8 



14.1 



9.4 



6.7 



9-3 



15-6 



12.4 



14.0 



8.0 



12.4 



23-0 

 30.0 

 25.0 

 24.1 

 21. 1 

 22.3 

 24-3 

 23-3 

 26.5 



27-5 

 24.7 

 40.0 

 36.6 

 17.9 

 18.8 

 20.7 

 19.0 

 23-3 

 38-3 

 27.7 

 19.8 

 19.6 

 21.7 

 19.8 

 30.8 

 23-8 

 20.7 



Average . 



5-i 



11. 8 



23-9 



Soil texture was controlled by the use of cultures of loam, 

 sand, and gravel. Soil texture affects principally the moisture 

 content and the air content of the soil, hence careful analyses to 

 determine both relations were made. The following moisture 

 determinations were made for sand, loam and gravel, which show 

 the amount of hygroscopic water, the volume of pore space, and 

 the amount of capillary water in each of these soils : 



1 Lost by accident in the soil oven. 



