Hop leaves were sprayed in plantation with aq. solns. of ZnSO4, corn. Zn chelate, Na2B4O2 center dot 10H(2)O and corn. B chelate with NH2CH2CH2OH and then rinsed with H2O after 2, 5, of the and 10 days to det. the efficiency of the foliar application of the elements. The Zn was removed from leaves to a higher extent than B.