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
425 Third Street, S.W., Suite 950
Washington, DC 20024
Phone: 202.962.0490
Fax: 202.962.0577