Contents of elements and their dynamics in soils and vegetation of spruce stands in forest parks of Prague

acid soils arboricultura urbana clay soils czech republic elements foresterie urbaine heavy metals humus leaching lessivage du sol loam soils metales pesados onagraceae parc public perfil del suelo picea profil du sol public parks rubus idaeus sambucus soil profiles sol acide sol argileux sol sablolimoneux suelo arcilloso suelo franco urban forestry