What we have in the present paper are the results of analysis on how the amount of precipitation, temperature, type of soil, and drip irrigation can affect celeriac root yield. The soil type had a considerable influence on yield. In both study years concerning two ways of growing - watering and dry cultivation, the celeriac root yield was higher on the chernozem soil type. The higher amount of precipitation and higher temperature during the period of vegetation resulted in higher root yield the first study year (both locality and dry cultivation).

Three fractions of lovage seed: small size 2.5 mm, medium size 3.0 mm, and large size 3.5 mm were analyzed in this paper. Contents of small fraction were 23 %, medium 46 %, and large 31 %. The infraction seed was used as standard. The indicators: germination energy, total germination and seed weight were investigated. The best results had the broadest fraction of 3.5 mm concerning all indicators.

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 "Domaća".