I have a blog and it was working fine with Google. I was getting a lot of hits from Google organic search ( around 80% of total traffic ). Then I used blogger import option to import postings from one of my old not working blog into this blog. After this I deleted the old blog as it was not working anyways. But immediately after doing this import my hits from google organic search dropped to almost zero I don't know what went wrong. And yes, both blogs are of similar type and the old blog content was also original Do any expert in this have any Idea?
What do you mean by old not working blog? This blog is no longer updated or is not online anymore? I am not sure if your old blog was at Blogspot or you have used CMS like Wordpress. If you have access to the files on the server where is/was your old blog I recommend to use 301 redirect using .haccess. For example, old-weblog.com/article will be redirected to new-weblog/article. If you cannot to do that than only continue doing what have you done till now. It often happen that your site drops down in search engines after adding a lot of new content.