Suppermnn
"Unfortunately, the ground was soft grassy area"
This is typical of your problem. You have measurements on how soft this area was? What is the soil strength profile here? You certainly cannot tell from a picture. (and yes, I am an expert on this subject).
A large, but not solid, collection of metal objects weighing in the hundreds of thousands of pounds impacts the ground at 500 mph and a piece weighing a few hundred pounds travels 300 feet in the direction of impact. Sorry that is just not a big deal.
20driver