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The
effectiveness of foliar applied nutrients is determined
by (1) The condition of the leaf surface, in particular
the waxy cuticle. The cuticle is only partially
permeable to water and dissolved nutrients and, as a
result, it can limit nutrient uptake. (2) The length of
time the nutrient remains dissolved in the solution on
the leaf's surface. (3) Diffusion, the movement of
elements from a high concentration to a low
concentration. For diffusion to occur, the nutrient must
dissolve, and (4) The type of formulation. Water-soluble
formulations generally work better for foliar
applications as they are more easily absorbed when
compared to insoluble solutions. |
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