I'm trying to understand my soil report and how I can amend my soil. My
question to y'all is about converting parts per million to pounds per acre.
Parnes in _Fertile Soil_ says to multiply ppm by 2 to find lbs/acre, for
*soils of average density*. Amigo Cantisano from Peaceful Valley seems to
be multiplying by 4 when calculating calcium requirements.
So, what is soil density? How is it measured? Does it make a difference?
Thanks, and Happy Epiphany!