I don't know if Texas has this available.  In Iowa you can go to the NRCS and get a CD for your county.  The program on it then allows you to click around an area and it will tell you the CSR and the acres within that area.

It also gives the bushels projected pre acre, however checking my farm I found it to be a wee bit off.  About 40 bushels off on corn this year and about 25 to 30 for past years.

Still it's a handy tool.