They sell a "wood Conditioner" for wood that will eliminate the grain raise after the surface is sanded.
The First Step to a Beautiful Finish
Many soft or porous woods, like pine and maple, have a tendency to absorb stain unevenly. Minwax® Pre-Stain Wood Conditioner is specifically designed for use before staining new or bare softwood surfaces. It penetrates the grain of the wood to promote uniform acceptance of stain. Treating the surface with Minwax® Pre-Stain Wood Conditioner helps prevent streaking and blotching to help ensure a beautiful, even stain. To determine if you are working with softwood, press your fingernail against a hidden section of the wood. If you make a dent, the wood is soft and probably needs conditioning and Pre-Stain should be used to avoid an uneven stain color. Consider Pre-Stain Wood conditioner as insurance for your project. When in doubt, use it.
http://www.minwax.com/products/woodprep/prestain.cfm