Kinds of fertilizers
Magnesium-containing fertilizers are derived from the mining of natural mineral deposits or
through synthetic processing. Organic magnesium sources include most manures (209)
magnesium availability to plants from different fertilizers will be dictated by the water solubility of
the compounds, release rates from fertilizer coatings (where applicable), and particle size, with the
finer particles solubilizing more quickly than the coarser-grade fertilizers. Magnesium concentrations
and solubility characteristics for some common fertilizers are listed in Table 6.3.