I worked for a children's home campus about 15 years ago. We were given access to a nursery area to transplant as many pine tree seedlings as we wanted to our campus. We failed to dig deep enough to obtain intact the taproots of the seedlings we dug up. Many died. But of those we dug up properly, we found that pouring some white vinegar was helpful, it seems that the ground was too alkaline for the acid loving pine tree varieties we had transplanted, and 5% acidity of the vinegar helped amend the soil. ... View related article.