I agree Mike, sometimes people are not totally sincere, either they omit or just past the page. I posted it because I think that we have to spread this information. Most of the people are ignorants of this very usefull information. We, in our family, are pationates of sustainable farming. Aldo I´m an anaesthesiologist, I live in a farm about 450 miles from work, but without the farm life I couldn´t live. The farm gives me the energy to attack city life.