Magnesium deficiency symptoms in sugar beet have increased recently. Seventeen factorial fertilizer trials, on fields where magnesium deficiency was expected, gave a mean response of 3.7 cwt/ acre of sugar to 5 cwt/acre of kieserite. Magnesium slightly increased the yield of tops, and either did not affect, or improved, juice purity and sugar percentage; it decreased yield on only one field.
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P. B. Tinker (1967) studied this question.