Bio-tech yields

A study on biotech yields suggests that yields with biotech are not much better than yields without biotech.  This is somewhat surprising, but it is interesting that our hybrids have huge yield potential even without bio-tech.  The real importance of biotech is, how much did it save us on insecticide use?  How much fuel did it save?  How much soil did it save?  The soil savings especially as a result of roundup ready must be large.  Roundup ready allowed the producers to no-till much easier and at lower cost than past products.  It is too bad that the product is no longer effective in all situations.  It is time to move on to Liberty link genes or go back to residual chemicals where resistance is a problem.