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To provide production of biodiesel fuel agriculture is required to grow “00” oilseed rape cultivars. In continuous process of the fuel production, grown oilseed rape seed should be regularly dried and properly stored. Drying rate and drying quality of the seed depends on physical conditions of the atmosphere when drying, physical and chemical properties of the material used, and the thickness of the layer through which water is diff used in the regime of drying. The study has been carried out on three “00” oilseed rape cultivars during three years period. Mathematical models of drying have been made to enable mutual comparison among the cultivars. Among the cultivars tested no significant differences were found regarding drying during one-year period. However, significant differences were found when comparison was made within the years of examination.

This study was aimed to examine the changes in seed oil content in different genotypes of maize, soybean and sunflower from 2002 to 2006, in two types of storage conditions which differ in air temperature and humidity: 25 C/75% and 12 C/60%, respectively. Affected by storage longevity, in average, seed oil content decreased by 0.82% in maize, 2.19% in soybean and 8.53% in sunflower. Differences in oil content affected by storage longevity were significant among tested crops and genotypes within crops. Storage longevity was negatively associated with oil content. At storage conditions at 12 C/60%, decreasing of seed oil content was less by 0.55% (maize), 1.30% (soybean) and 1.75% (sunflower) than in storage conditions at 25 C/75%. In summary, the lowest seed quality losses were in maize, then in soybean and thie highest losses were in sunflower. Decreasing of seed quality losses is possible with suitable storage conditions, particularly for soybean and sunflower.