Zs. P. Komáromy szerk.: Studia Botanica Hungarica 16. 1982 (Budapest, 1982)

Hably, Lilla: The relation between Pb-pollution along mainroads and the trace element-composition in soil and vegetation (Examination of section rectangular to M3 mainroad)

to it, parallel with our section there is a row of planted poplars which were also sampled. The grass along the mainroad cannot be considered native grass cover because agricultural cultivation and mainroad building left only such a narrow place for it, that mostly cosmopolitan roadside species thrive in it. It does not contain natural plant assemblages. The whole of the plantage shows antropogene influence partly through tree plantation, partly through agricultural cultivation. Sampling from plants For the examination of the trace element composition of surface vegetation, samples from several species were collected and classified also according to organs. The plants selected for examination were partly cultured, partly wildgrown. (Several plant samples coming from each soil-section have been specially numbered.) 6. Lawn sheared with scissors from beside the sampling hole No. 30, washed during sample preparation. 6. a. Same, unwashed. 7. Lawn cut from area two meters south of hole No.

30, washed while preparing sample. 7. a. Same, unwashed. 8. Washed fruit of Rosa canina collected from the vicinity hole No. 31. 9. Washed leaf of rosa canina from the vicinity of hole No. 31. 10. Washed grass collected 1.5 m south of hole No. 31. 11. Washed root of maize, collected near hole No.

32. 12. Washed stalk of same. 13. Washed leaf of same. 14. Washed corn of same. 14. a. Unwashed leaf of same. 15. Washed root of maize collected 20 m south of hole No. 32. 16. Washed corn of same. 17. Washed stalk of same. 18. Washed leaf of same. 19. Washed ear of same. 20. Washed corn of maize collected at hole No. 33. 20. a. Unwashed corn of above sample. 21. Washed root of above sample. 22. Washed stalk of above sample. 23. Washed leaf of above sample. 24. Washed corn of maize collected at hole No.

34. 24. a. Unwashed corn of above sample. 25. Washed root of above sample. , 26. Washed stalk of above sample. 26. a. Unwashed stalk of above sample. 27. Washed leaf of above sample. 27. a. Unwashed leaf of above sample. 28. (Row of poplars as sampling point 35) Washed leaf of poplar belonging to the row of poplars 13 m from the road. 29. Washed leaf of poplar 18 m from the road. 30. Washed leaf of poplar 30 m from the road. 31. Washed leaf of poplar 94 m from the road. 32. Washed branch of poplar 13 m from the road. 33. Washed branch of poplar 18 m from the road. 34. Washed branch of poplar 30 m from the road. 35. Washed branch of poplar 94 m from the road. 36. Washed grass cut from around hole No.

36. 37. Washed grass cut 5 m north of hole No.

36. 38. Washed leaf of Amorpha fruticosa 5 m north of hole No.

36. 39. Washed crop of Amorpha fruticosa 5 m from hole No. 36.