Abstract
The aim of these experiments was to determine whether uninhibited root growth is possible in a soil lacking Mg, provided that the plant is adequately supplied with Mg from another region within the soil. Two experiments were undertaken using split root systems in free-draining sand or gravel irrigated daily with nutrient solution. Magnesium supply to one half of the root system was varied and root growth in the deficient part of the system was measured. Magnesium redistribution was compared to that of calcium, phosphorus and potassium.
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