Pre-cooling is meant to

Pre-cooling is meant to remove the field heat.
Pre-cooling is a vital post-harvest management practice that is required before storage. Since there is a big difference between the temperature of harvested crops and cooling storage, the main purpose of pre-cooling is to remove the heat from the crops after they are harvested.
There are seven principal methods of pre-cooling fresh produce:
1) Room cooling
2) Forced-air cooling
3) Hydro-cooling
4) Ice cooling
5) Vacuum cooling
6) Cryogenic cooling
7) Evaporative cooling