treatment to protect broadcast- sown seed from rodents. Plots seeded with 

 Endrin- treated seed had 9,000 hemlock and spruce seedlings per acre. Plots 

 receiving only natural seed fall had 3,000 seedlings per acre, and 3,750 

 seedlings per acre when supplemented with broadcast-sown untreated seed. 



Another study, one in which screened and unscreened seedspots are located 

 on various seedbed types, showed that seedling survival on unscreened 

 spots was 37 to 53 percent of that on screened spots--further evidence of 

 the need for protecting seed from seed-eating mammals. 



It would appear from the last two items that there are enough seed-eating 

 small mammals to make it worth while to use Endrin-treated seed for any 

 artificial seeding that is done. Artificial seeding probably will be 

 needed only where there is danger of brush or fern invasion. Most cutover 

 areas will be small enough so that seed will reach all parts and, in 

 addition, will usually have advanced reproduction 'sufficient to stock them. 



1956 and 1957 cone crops in Region 10 



A standardized system for rating cone crops was started in Region 10 by 

 adopting the rating system used by the Oregon State Board of Forestry. 

 Cone crops were rated by number from 1 to 10 for each species as follows: 



No cones on any trees 



Few cones on occasional trees 



Few cones on 25 percent of trees 



Few cones on 25 percent of trees- -many cones on 



occasional trees 

 Few cones on 75 percent of trees 

 Many cones on some trees--few cones on 75 percent 



of trees 

 Some cones on all trees 



Many cones on some trees--some cones on all trees 

 Many cones on 75 percent of trees--some cones on 



all trees 

 Many cones on all trees 



Ratings by species for Southeast Alaska^' as determined by averaging the 

 reports from all ranger districts are listed in table 5. Few ratings 

 were made for the less abundant tree species and, although useful, are 

 not as applicable on a regional basis as Sitka spruce and western hemlock. 



The annual cone crop reports are used for several purposes. Reports sub- 

 mitted early in the season aid in preparing seed collection programs and 

 interpreting the need for direct seeding. Ratings for a successive number 

 of years should help to establish seed crop periodicity patterns. It is 

 anticipated that a relationship between size of seed crops and factors 

 such as weather may be eventually established. 



None 





- 1 



- 2 



Very light 



- 3 







- 4 



Light 





- 5 



- 6 



Medium 





- 7 



- 8 



Heavy 





- 9 



- 10 



2/ All areas south of Yakutat 



-18- 



