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Absorption of magnesium by McIntosh apple leaves as influenced by spray composition and weather conditions


, : Absorption of magnesium by McIntosh apple leaves as influenced by spray composition and weather conditions. Canadian Journal of Plant Science 53(3): 579-584

Nine-year-old trees were sprayed to run-off with MgSO4 or Mg (NO3)2 solutions alone or MgSO4 in combination with Mg(NO3)2 or Ca(NO3)2 or urea. Adding Ca(NO3)2 to MgSO4 sprays increased Mg absorption by the leaves. Adding urea had no effect on Mg absorption. The absorption of Mg over 24 h from MgSO4 varied from -2.5 to 19.4% of the initial spray deposit, whereas absorption from Mg(NO3)2 varied from 18.3 to 50.2%.

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