Thanks Lucy & Porkpal for your pertinent suggestions.
Here is my response.
1. He used another organic fertilizer which is usually used by people having same trees. He has used it once a year since 2020.
2. Logically I tend to agree with your observation that roots were damaged in earlier exercise. Now the issue seems to be no fruit on one side with plenty of healthy leaves. May be we should wait till next Kinno flowering season if tree has fully recovered.
My comment about soil has been isolated is in the context of P/H value. A sweet Orange tree growing next to Kinno is doing ok, with plenty of fruits.
3. Will follow your advise, hope the tree will come out of its hibernation.
Thanks everybody for your valuable suggestions & comments.
Regards, AY100002