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ID number:645252
 
Evaluation:
Published: 02.12.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Pilsētas kokiem NaCl kaisīšana uz ielas ziemas periodā rada negatīvu ietekmi uz koku veselību nākamajā veģetācijas periodā. Na joni ir agresīvāki par augiem tik nepieciešamo K un „izkonkurē” K jonus par iekļūšanu auga organismā. Rezultātā augam parādās K trūkumam raksturīgās pazīmes- lapas dzeltē, lapu galos un malās parādās brūni plankumi.…

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