Abstract
THE influence of manuring on the resin content of the hop cone (strobile) has been the subject of a number of investigations. Doerell1 concluded from German and Czecho-Slovakian experiments that the resin content rose when potassium and phosphorus were applied in excess of nitrogen, and more recently Zattler2, in Germany, has stated that phosphorus has a beneficial effect on resin content, but that excess of potash, and especially of nitrogen, depresses the resins. The depressing effect of nitrogen has also been reported by Keller and Magee3 in the United States.
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References
Doerell, E. G., “Die Düngung des Hopfens” (Verlag der Wissenschaftlichen Anstalten für Brauindustrie, Prag, 1933).
Zattler, F., Brauwissenschaft, N. 12, 177 (1949). (Abstract in Wallerstein Lab. Comm., 13, 160 (1950).)
Keller, K. R., and Magee, R. A., Agron. J., 44, 93 (1952).
de Koker, Verbelen and Van der Velde, Petit J. Brass., 39, 1417 (1931).
Burgess, A. H., J. Inst. Brew., 33, 138 (1935).
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THOMPSON, F., BURGESS, A. Influence of Mineral Nutrition on the Resin Content of the Hop Cone. Nature 170, 890 (1952). https://doi.org/10.1038/170890a0
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DOI: https://doi.org/10.1038/170890a0
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