Two very good comments regarding 1031's .  One with the down side the other with the up side.  My original thinking is a pre planned program that incorporates the benefit of rolling non taxed money into land.  I have never heard of ag financial advisor economist ect truly recommending it  as a way to acquire financial wealth or additional land base.   I actually saw an investor rolling money via houses and 1031 to shelter tax free money.    They flipped housed right and left.  With that being said we could do the same with farm ground that in most cases we might pass up because it was.  Well this or that. but for what ever reason it was financially sound and we happen to have the ability to make it work.  Knowing that it was just a property to roll out when the better opportunity show up.  It really helps that we have had inflation in our land assets for extended period of time.  
Taking some calculated risk that it will continue.  A planed 1031 would move those tax free inflated dollars into the right piece of property that will cost to much.  Like a 40 that adjoins your farmstead.   Entire basis is that to pay off land it is done with after tax dollars that means basically 130% while the interest is deductible the principal is not.  Its difficult to get dollars threw the system to land.  A 1031 would provide another vehicle we often don't think of in advance as farmers.