It has been successfully used on farms in the Midwest and West of the US for over 40 years, and is currently used on more than 36% of the U.S. farmland., Boucher, J. University of Connecticut. "Soil Health and Deep-Zone Tillage", 2008. Some specific states where zone tillage is currently in practice are Pennsylvania, Connecticut, Minnesota, Indiana, Wisconsin, and Illinois.
it has been successfully used on farms in the midwest and west of the us for over 40 years and is currently used on more than 36% of the us farmland boucher j university of connecticut "soil health and deep-zone tillage" 2008 some specific states where zone tillage is currently in practice are pennsylvania connecticut minnesota indiana wisconsin and illinois