The primary benefits from precision agriculture, both economic and environmental, result from reduced or targeted placement of crop inputs such as nutrients, pesticides and water. There are many other benefits. Precise nutrient applications can provide signifi- cant economic and environmental benefits.
Iron rich minerals in rock pointed in one direction the switch to the exact opposite direction. I'd say that what supports this idea is that <span><u>Earth's magnetic field goes through pole reversals.</u></span>
