Do you have to yield the right of way to the vehicles travelling along the paved road in this situation?

Yes, in this situation you are joining the flow of traffic by driving from an unpaved road onto a paved (asphalt) road. According to art. 17 para. 1 pt. 2 of the Road Traffic Act, a driver joining the flow of traffic is obliged to give way to another vehicle or road user. Therefore, you must let all vehicles travelling on the road you intend to enter pass first.