Weed flora of winter and spring small grain crops (wheat, barley, oats, and rye) was surveyed in lowland and mountainous areas of the central part of Serbia, which are dissimilar in environmental conditions, primarily climate and soil characteristics, and crop management practices. | Research Article Turk J Agric For 33 (2009) 325-337 © TÜBİTAK doi: Weed vegetation of small grain crops in Serbia: environmental and human impacts Sava VRBNICANIN1, Zora Dajic STEVANOVIC1, Katarina Jovanovic RADOVANOV1, Ahmet ULUDAĞ2,* 1Faculty of Agriculture University of Belgrade, Nemanjina 6, 11080 Belgrade-Zemun, SERBIA 2İzmir Agricultural Quarantine Directorate, Liman Cad. 25, Alsancak, İzmir - TURKEY Received: Abstract: Weed flora of winter and spring small grain crops (wheat, barley, oats, and rye) was surveyed in lowland and mountainous areas of the central part of Serbia, which are dissimilar in environmental conditions, primarily climate and soil characteristics, and crop management practices. The weed community of the mountainous area was more diverse that of the lowlands. The weed community of the mountainous area was characterized by a significantly higher proportion of dicotyledonous species, mainly hemicryptophytes, probably due to insufficient tillage and the consequent impact of surrounding grassland vegetation. Different environmental conditions and crop managements of the 2 sites caused the occurrence of 2 separate weed communities, the ass. Consolido-Polygonetum avicularae in the lowland area, and ass. Galeopsi-Brassicetum campestrae in the mountain area of the surveyed region in central Serbia. Key words: Correspondence analysis, weed communities, weed survey in cereal stands Sırbistan’da serin iklim tahıllarında yabancı ot vejetasyonu: çevre ve insan etkileri Özet: Orta Sırbistan’ın, başta iklim ve toprak özellikleri olmak üzere farklı çevre şartlarına ve farklı tarım uygulamalarına sahip iki bölgesinde (dağlık bölge ve alçak ova bölgesi) kışlık ve yazlık serin iklim tahıllarında (buğday, arpa, yulaf ve çavdar) yabancı ot sürveyleri gerçekleştirilmiştir. Dağlık bölgede yabancı ot topluluğu ova bölgesine göre daha fazla çeşitlilik göstermiştir. Dağlık alandaki yabancı ot toplulukları, yetersiz toprak işleme ve
