Tests were carried out on the influence of low temperatures during winter dormancy on per cent of central and lateral buds freezing in Merlot Standard and its varieties. The method applied was in vitro artificial freezing of cuttings of one-year-old shoots in cold storage. Three low temperatures were applied: -15°C, -20°C and -25°C. Tests were performed simultaneously in all varieties three times during winter on December 25, January 25 and February 25 in 1998, 1999 and 2000.

Phenological stages of white wine varieties grown in the "Radmilovac" collection vineyard were recorded during a three- year period. The included stages were: time of bud burst - shoot growth, flowering, véraison and full ripening. The number of days, sum of active and sum of effective temperatures were established for each phenological stage, 12 features in total.

The results of two-year investigations of buckwheat raised in agroecological conditions of South Banat (Pančevo) and West Serbia (Gorobilje) are presented in the paper. Based on the obtained investigation data, we confirm the hypothesis that buckwheat is a plant suited to more humid regions, since we have determined higher yield of the plant on locations with higher precipitation amount. During 1999, the yield of buckwheat was higher at the location in Pančevo and the next year at the location in Gorobilje.