ʻO ka palau ʻōpala he ʻūla ʻehā huila i kau ʻia ma ka tractor.ʻOi aku ka maikaʻi i ka mahiʻai me nā mauʻu he nui a kiʻekiʻe nā kumu a hoʻihoʻi ʻia nā ʻōpala i ke kula, ʻaʻole maʻalahi ke pani ʻia a huki ʻia, ka lepo.Me ka hoʻohuli ʻana i ka lepo i ʻōwili ʻia, ʻoi aku ka ikaika o ka frictional, ʻoi aku ka haʻahaʻa o ka maikaʻi i hoʻopau ʻia, no laila ʻoi aku ka kiʻekiʻe o ka maikaʻi a ʻoi aku ka liʻiliʻi o ka ʻaila i hoʻopau ʻia ma mua o ka mahele o ka palau.