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Dehydrogenase and catalase activities were measured in a Eutric Histosol irrigated with municipal wastewaters (Lublin, Poland) purified by a two-step (mechanical and biological) treatment. Soil enzyme activity was used to test the biochemical status of the soil-plant system, the last step of wastewater purification. Three experimental fields, each of I ha area, were planted with Populus nigra, Salix...
The main mechanism responsible for N20 production in agroecosystems is denitrification of nitrates (V) under hypoxic conditions, which occur e.g., after intensive precipitation or at high ground water level. The calculations of potential denitrification were performed for surface horizons from 672 soil profiles representing 25 main soil units of Polish soils. A proposal of the assessment of potential...
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