i have heard that pine trees make the soil acidic therefore you cant plant near them is this true?

Not true...marijuana prefers acidic soil.

true, dolomite lime could be added, or transplanting new soil. i have always been told cannibus preferes a neutral ph

The soil is to acidic if its just natural soil.Thats why even field grass doesnt grow under the trees.Almost alway bare. I have pine trees in my back yard and every year I have to till the soil mix in good soil and dump lime in it to get the soil down to usable. Then I replant greass seeds but the dropped needles make it acid ovber the course of the year and grass always dies

good point, if you ever see a pine forest, all you see is evergreens, the ground is completely bare but for a deep bed of needles and a few small pine trees.