Bārdule, A.; Lazdiņa, D.; Zadvinska, K.; Buša, L.; Vīksna, A.; Bārdulis, A. Carbon and Nitrogen Stabile Isotope Ratio and Heavy Metals in Leccinum Aurantiacum in a Hybrid Aspen Plantation in Agricultural Land Initially Fertilised With Biogas Production Residues, Sewage Sludge, and Wood Ash. BALT FOR 2020, 26.