Can we avoid blank entries in Audit History CRM 2015 for custom entity

Hi,
Can we avoid blank entries in Audit History. out of 10 fields i have only 4 fields are marked for Audit. I am getting an empty/blank entry in Audit history when i make changes to other 6 fields only (without changing from 4 Audit fields). B'coz of this there are so many empty unwanted entries.

MSBK