Initially ad sense takes time to build up gradually. It mainly depends on the web content posted by you.
If your posts are such that many readers visit the content and good advertisements are displayed. No just that, the visitors should be clicking prompted by the use and need of the advertisement matter.
The adsense income in general depends on the high number of visitors and the high number of positive clicks on ads displayed there.
A word of caution; no artificial methods should be used to inflate visits and clicks.
It is a general inference (regarding ISC) that one gets chance of more AdSense revenue by contributing good quality, unique subject unique content articles. Job posts also get visitors and ad sense more. The other section that gets visitors and adsense (as per user feedback) is admissions and colleges.
There are some helpful articles and forum discussions and testimonials in ISC pages about adsense and increasing adsense revenue. You may search with proper words.
One such link is AdSense Revenue Sharing