What trees are made of...

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Across
  1. 2. a plant with sticky hairs that catches insects
  2. 3. If adding a nutrient increases the growth and/or reproduction of the plant, it could be assumed that this nutrient is __________.
  3. 6. American historical event of 1930s caused by poor soil management
  4. 11. where the N-fixers live in a plant
  5. 12. the texture of soil between sand and clay
  6. 14. soil horizon where most of the organisms live
  7. 15. Many micronutrients are this "kind" of element (chemically speaking).
  8. 16. result when lakes receive too much nutrient runoff
  9. 18. what made cities and civilization possible for the first time
  10. 21. (2 words) natural climate cycles that can break down rock, esp. in winter
  11. 22. what plants do to soil when they pump H+ ions into their root zone
  12. 24. what water does to anions
  13. 26. function of micronutrients in a cell
  14. 27. what trees are made of
  15. 28. type of soil that packs together very tightly, limiting root penetration and O2 availability
  16. 30. sinking, settling of land
  17. 33. Ca2+, Mg2+, K+
  18. 35. a plant that lives on another plant (but not a parasite)
  19. 36. small rocks; largest particles that can be called "soil"
Down
  1. 1. white buildup caused by molecules left behind by evaporation, as well as those brought to the surface by capillary action
  2. 2. result of overwatering on land surface
  3. 4. a favorite plant parasite at Christmas time
  4. 5. element that is required for normal growth & reproduction
  5. 7. soil horizon where lots of metals build up
  6. 8. (2 words) the part of the root that takes up most water and nutrients from soil
  7. 9. dead organic matter in soil
  8. 10. Greek goddess, namesake of a flytrap
  9. 13. elements needed in high quantities
  10. 15. symbiosis, literally "fungus-root"
  11. 17. alternative plant lifestyle most like an animal
  12. 19. the ability of soil to adsorb and release positively charged particles
  13. 20. 3 elements that make up 95% of plant biomass, in ABC order
  14. 23. parent materials of soil
  15. 25. plant organ that pierces another plant's vascular tissue in order to steal water, carbon, or nutrients
  16. 29. underground reservoir of water in porous rock
  17. 31. the electrochemical charge of clay and organic matter
  18. 32. type of soil made mainly of silica, that drains easily
  19. 34. the color most parasitic plants are NOT