Video Highlight...
The IPNI North American Soil Test Summary is the only survey of its kind to assess the fertility of North American agricultural soils.

The IPNI North American scientists worked with 61 soil-testing laboratories in the U.S. and Canada to gather data from over 7 million soil samples on how soil nutrient concentrations change across the continent and change over time. IPNI is the only organization with strong enough connections with soil testing laboratories to conduct such a massive summary.