Calcium and magnesium are considered secondary nutrients because they are less commonly yield limiting than the macronutrients, yet are required by crops in relatively large amounts. This module will cover important concepts of calcium and magnesium management in agricultural systems to provide for profitable crop production.

The Fertilizer Institute
4201 Wilson Blvd, Suite 700
Arlington, VA 22203
Phone: 202.962.0490
Fax: 202.962.0577