Influence of the humification process on the properties of peat humic acids
Šīre, Jānis, Kļaviņš, Māris
Soil Pollution with Trace Elements in Territories of Military Grounds in Latvia
Kokorīte, Ilga, Kļaviņš, Māris, Šīre, Jānis, Purmalis, Oskars, Zučika, Aija
Experimental Study of Peat Humification Indicators
Šīre, Jānis, Kļaviņš, Māris, Purmalis, Oskars, Melecis, Viesturs