Growing space and growth factor gradients

1. Growing space and growth factor gradients

2. Controlling disturbances is how we control competition

3. Competition • Growth factors • Consider light and water (aboveground and belowground)

4. TULIP POPLAR VIRGINIA PINE MESIC SOIL DRY SOIL MESIC SOIL DRY SOIL GROWING TOGETHER MESIC SOIL DRY SOIL

5. Light • PAR • PhotosyntheticallyActive Radiation • Sun foliage/ shade foliage • Shade tolerance

6. Sun foliage Ps Shade foliage 0% 20% LIGHT

7. Sun foliage Ps Shade foliage 0% 20% LIGHT

8. Shade Tolerance Shade intolerant Ps Shade tolerant Light

9. Water • Input • Soil • Stomates

11. Field Capacity Percent Soil Water Available Water Unavailable Water Heaviness of Texture From Brady, 1974

12. Growing Space • Sunlight • Water • Nutrients • Physical space

13. Total growing space • Available growing space

14. 1200 TPH

15. 640 TPH

16. 250 TPH

19. Total growing space • Depends on time and place • Macro and Micro conditions

21. Available Growing Space • Grow • Regeneration

22. Thinned Unthinned

23. Earlywood Latewood

24. No Available Growing Space • Repartition • Competition