Visual and Physiological Symptoms
Soil Physical and Chemical Properties That May Favor Magnesium Deficiencies:
Notes on Soil Complexity
Plant Mineral (Tissue) Analysis
Table 1. Critical magnesium (Mg) ranges for several physiological growth stages in corn
(Lockman,1969)
Table 2. Some critical nutrient values for corn ear leaves silking / tasseling
(Jones and Eck, 1973)
When a magnesium deficiency is conclusively identified remedial and preventive treatments may be needed.
Figure 1. Relative availability of magnesium, calcium, and iron in low CEC soils. Even at close to optimum pH levels, magnesium can still be unavailable in some situations