Szukana fraza: [Abstract = "Several papers reported, however, unwished\-for effects of those measures, that involved an increase in the solubility of metals caused by application of organic amendments, including brown coal \(lignite\), organic fertilizers, sewage sludge, composts, and biochar. This review focuses particularly on such effects. Additionally, the hazards associated with formation and decomposition of forest litter in degraded areas after their forestation, have also been discussed."]