EN
A strict two-factor field experiment was set up as a randomized complete block design over 2000-2002 at the Experimental Station of the Faculty of Agriculture, University of Technology and Agriculture, at Mochełek, and involved a traditional yellow lupin cultivar, `Idol´, whose plants were sprayed with Tytanit preparation, containing 46% of Ti. The first factor covered the following objects: three spraying dates: single spraying after blossom fall, double spraying - after blossom fall and 7-10 days later and triple spraying - after blossom fall, 7-10 days later and then 7-10 days later. The second factor involved the following objects of Tytanit concentration: 0.02, 0.04 and 0.06%. The plots which were not sprayed constituted the control. Throughout the research years there was observed a significant effect of Tytanit on 7.4-18% increased yellow lupin seed yield. Tytanit did not show a significant effect on the structural components of the seed yield from the main stem; its application resulted in a significant, as compared with the control, increase in the number of pods and seeds as well as in the seed weight from branches. As for yellow lupin yielding, the optimal solution seems to be offered by a double application of 0.02-0.04% of Tytanit straight after plant blossom fall and 7-10 days later.