ABSTRACT
The element Dysrosium 63, which is rarely found in nature, was used to mark the rye pollen grains. The number of grains per ear was counted in both seasons and values were found to be significantly different at various distances. Three different methods were used to measure the dispersal of pollen grains and to determine the rate of cross-pollination: Measurement of pollen dispersal by means of pollen tracers and microscopic analysis. Measurement of cross-pollination by means of self-sterile clones of perennial rye as indicator plants using genetic analysis. It also include: Measurement of pollen dispersal by means of the Indicator Activating Method. Polyethylene sheets 4 × 8 cm were attached to the cylinders to catch pollen grains by static electricity. Ninety seven percent of the total pollen grains were found at 20 m distance in the first experiment.
