planet limit was not reached but food limit?
Where would i see food limit? and to add extra food is buy building farms correct which will increase pop limit also?

PQ? planet quality, did you mean planet pop limit?

Okay, you've got the food limit right. It's mt/wk. that's how many people your world has the possibility to reach, how many it can support if you will. However, all worlds also have an internal limit as to how much population it will grow. Unytil I read through quite a few of these threads I was perplexed as you are. On smaller worlds, pop will only grow so much. after that is reached, it will not grow any further. You can always transport more people there how ever, up to you food limit. Hope this helped.

There definitely is a pop cap based upon planet quality. Luckily, you can get around it by researching the planetary improvements techs, i.e., Soil Enhancement, Habitat Improvement, Terraforming. I don't keep my 4-PQ planet at that PQ for too long, unless I'm planning to ferry population to that planet via colony ships or troop ships. I think that all other people who play at the higher difficulty settings will give this same advice.

Population is perhaps your most valuable resource. Of course it depends upon your strategy, but I find this true for any strategy I have used so far.