Magnesium (Mg) - soil and crop

The availability of magnesium to crops depends on the balance between the supply of magnesium, potassium and calcium. These elements can 'crowd out' each other: a high potassium content negatively affects the uptake of magnesium by the plant root. At a low pH, the availability of magnesium also decreases. Eurofins Agro's analysis Fertilization Manager provides appropriate fertilization advice and shows, for example, the ratio of potassium to magnesium in the analysis results.

Types of roughage with a relatively high magnesium content include grass and grass silage, red clover and alfalfa and alfalfa silage. Cut corn, straw and potato press fiber contain relatively little magnesium.

Magnesium content (g/kg dm); Eurofins Agro 2009-2013
  Fresh grass Grass silage Maize silage Lucerne
Average 2.4 2.4 1.3 2.5
Target range - 2.0-3.5 1.1-1.6 -


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