What are Buddha-fields and Dharma-fields in Buddhism? What roles do they play in various lineages? Recently, I heard the terms Buddha-fields and Dharma-fields.  It was explained as a place to do good deeds for gaining good karma.  However, I'm not sure about the explanation or what it means.  What are Buddha-fields and Dharma-fields?  What role do they play in Buddhism?
A Buddha-Field is another word for a Pure land, a realm associated with a Buddha. In the Pure Land Buddhism followers chant to a Buddha such as Amitabha in order to be reborn in his pure land where enlightenment is guaranteed thereafter. 

To be honest I'm not seeing much about Dharma-Fields when I look. But if you are seeing the term used in the same context as Buddha-Field I'm going to go out on a limb and say they mean the same. I'd be interested if someone else knows otherwise.

The question about pure lands give more information.

I hope that helps some.