Green Brinjal Issues

We have grown 4 acres green brinjal and use precision farming methods.
We are facing one problem which I need your guidance. The fruits are not becoming big size and some of them are yellowing at very small stage itself. Some fruits are becoming white in small size and when cut, the seeds are formed. Attached some pictures.

Similar issue in purple brinjal where the fruits are ripening at small size.

We are continuing with fertigation per hectare of
12:61 - 12kgs
KNO3 - 44kgs
Urea - 71kgs
This is split every 3 days for a duration of 75 days.

Please let me know the solution.