Tip-burn of Lettuce in relation to calcium nutritionTools Kruger, N. (1966) Tip-burn of Lettuce in relation to calcium nutrition. Queensland Journal of Agricultural and Animal Sciences, 23 (3). pp. 379-385.
AbstractThe disease [cf. 46, 1392 et passim] appears to be caused by Ca deficiency in the young leaves, since Ca sprays prevented its occurrence until head formation began. when they could no longer be applied directly to the young leaves.
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