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Persistency of grass associations is one of the way to counteract degradation of grasslands. The objective of the investigations carried out in 9-11 years of pasture use was to evaluate Poa pratensis persistence in sward. In the years 2005-07 Poa pratensis made 22.3-47.6% in the first regrowth of grass-clover sward and 39.3-52.1% of grass sward. The last two years were marked by a clear decrease of...
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