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The content of biogenic substances, i.e. ammonia (NH4+), nitrates (NO3–) and phosphates (PO43–), in the mountain stream waters was studied. The test (zero) sample was the water flowing from forest areas, while the study samples included the water from the streams flowing through extensively used sheep pastures. The impact of grazing on the water quality during high (in the rainy season) and low (in...
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