How many google ads can i place on a single page?

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are there any restrictions as such? the other day Artguy gave me tips on blending Adsense ads color to the site, it worked great, thanks to him, i also modded my blog template to match my content, but still, I'm lacking the experience to choose the right keywords, but still I'm researching on it. But now guys please help, Let me know how many ads can be placed maximum on my site?(blog) I'll be happy if you take a look at my blog and make a small review, please leave your blog too, so I can learn things from your blog and let you know what i feel, thanks :) This is my blog: indianroadreviews.blogspot.com