That’s what growing together looks like. These New Zealand apple trees are off to a good start when planted in soil treated with blends of 1,3 - Dichloropropene plus chloropicrin.
Replant Disease is a widespread problem in intensive tree fruit and nut growing areas. It is characterized by reduced productivity in fields repeatedly planted to the same or closely related tree fruit or nut crops. It can also occur in tree fruit and nut nurseries.
Proper Soil Fumigation with products like TriChlor™ have shown long-term efficacy in treating Replant Disease.