Initially, I was having imbalance data like, in crop disease dataset there are 15 classes and every class was having image number like 997, 152, 3500,1500, etc, so but after knowing I downsampled it.
Now I have balanced data with 80% in train ie downsampled: 9906, ds_valid: 2470.
On this, I am getting a training score as 56% and val acc at 7%.