3. Results
3.1. Pollen flow
Pollen density on average was 1.01 × 105pollen per squaremeter in the open experiment and 1.79 × 105pollen per squaremeter in the Sorghum experiment . There were a total of1.27 × 105and 2.44 × 105pollen captured in all sticky slides (each0.01 m2) of all locations in the open experiment and the Sorghumexperiment respectively. Around 98% of total pollen was loadedin the distance less than 10 m in the Sorghum site, whereas thedistance that loaded 98% of total pollen was 35 m in the open site. The pollen density and RPF on the further locations ateach directions was higher in the open site than in the Sorghum site. The Sorghum barrier significantly decreasedthe pollen load in further distances.