CONTENTS 



4. The Disadvantages of Pure Stands 63 



5. The Advantages of Pure Stands 64 



6. Mixed Crops in Artificial Reproduction 64 



7. Rules for the Formation of Mixed Crops 65 



8. Advantages from Mixed Regeneration when Correctly Made. . . 66* 



9. Even-aged Mixtures 67 



10. Uneven-aged Mixtures 68 



11. Special Considerations which may Determine the Species in the 



Mixture 69 



12. Temporary Mixtures 70 



13. The Use of Fillers 70 



14. The Use of Nurse Trees. . 70 



PART II. THE ARTIFICIAL FORMATION OF WOODS 



CHAPTER VI 

 GENERAL CONSIDERATIONS 



1. The Choice between Natural and Artificial Regeneration 77 



2. The Cost of Natural Regeneration as Compared with Artificial. 78 



3. The Time Required for Natural as Compared with Artificial 



Regeneration 80 



4. Variation in the Character of the Stand Arising from Natural 



as Compared with Artificial Regeneration 80 



5. Advantages and Disadvantages in Artificial Regeneration 81 



6. Choice between Direct Seeding and Planting 82 



7. The Difference in Cost 83 



8. The Difference in Time Required for the Stand to Close 86 



9. The Difference in the Quality of the Stand 86 



10. Mixed Regeneration 87 



CHAPTER VII 

 FOREST TREE SEED AND SEED COLLECTING 



1. Demand for Forest Seed 90 



2. Sources from which Seed may be Obtained 91 



3. Ordering Seed from Collector or Dealer. ., 91 



4. The Quality of Forest Seed 91 



5. The Origin of the Seed in Relation to Quality 92 



6. The Size and Weight of Seed in Relation to Quality 95 



7. Variations hi Seed Filling 96 



8. The Average Number of Seeds per Pound 96 



9. The Number of Pounds of Seed per Bushel of Fruit and 



Cost per Pound 100 



