SOME OBSERVATIONS ON THE INTERRELATIONSHIPS OF POTASSIUM AND MAGNESIUM

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Abstract
A factorial 42 sand culture pot experiment, using different ratios of nutrient K and nutrient Mg, was carried out to study the interrelationships of the 2 nutrients in lucerne plants. The results showed that what may be called a one-way competition, with the uptake of Mg being reduced by an increase in nutrient K, whereas K absorption was hardly affected by the presence of nutrient Mg even at high levels. This oneway competition in the absorption of ions merits further investigation.

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