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In organic plant production it is necessary to establish isolation buffer between organic and conventional production areas. Organic demo-field was established towards the end of 2008 in a part of Institute 'Tamis' Pancevo experimental field. The perennial fennel (Foeniculum vulgare P. Mill.) was planted as isolation buffer. Phenological observations were performed and variable costs monitored in the foundation year of 2009 and in the following 2010. The production costs, otherwise high in organic production, were not increased. The fennel production achieved visibly better financial results as compared to sunflower and maize production, which are the plant species most often used as isolation buffers. The product can be processed to manufacture bio-preparation that can also be used in organic production. Also, fennel is an entomophilic plant species, has a long blooming phase, attracts useful insects, pollinators and predators, aiding biodiversity and bio-control maintenance and improvement in agroecosystems.

Intensively researching different populations of elecampane, we are able to present the results of yield achieved during three years' microexperiments (2001, 2002, 2003) realized in non-watering field crop production. Comparing the results of yield, it was concluded that all five populations had higher yield, both fresh and dry elecampane root mass, compared to standard cultivars called "Domaca". The highest yield of 28,617 kg ha"1 of fresh, and 8,301 kg ha"1 of dry root had the population "NS", and it was more than standard. Considerable results were achieved by the population "SZ" (77 % higher yield of fresh mass, and 70 % of dry mass), also the population "BM " (62 % higher yield of fresh mass, and 84 % of dry mass). The lowest yield had the population "SG" and standard cultivars "Domaca", mostly because of late planting in the second study year.