With the help of a hand-auger you can drill the convenient hole independently. But for that you need a drill extension to 115 cm drilling depth, because standard drills stop at 80cm depth.
This effective version takes only 20-30 minutes and presupposes a normal nature of the ground.
The drill also works through stony and tight soil with roots. Thicker stones can be loosened and removed with the wobble-technique (strongly wobble the shaft while twisting and drilling). To relieve the first twists of the hand drilling, the drilling person can stand on a podium (for example a reverse beer crate) to have a better drill contact pressure. Furthermore a wheel barrow for the ca. 50kg earth excavation should be available. Afterwards press the underground tube in the drilled hole. Do it with slight to medium pressure (don’t do it with force). If the ground is tight or clayey, remove more earth from the side walls. After you sank in the underground tube, fill possible outer gaps with earth. Don’t forget the coverage!
Link to our video: This is how our hand auger works