Environment and weather influence on quality and market value of hops

https://doi.org/10.17221/499/2011-PSECitation:Pavlovic V., Pavlovic M., Cerenak A., Kosir I.J., Ceh B., Rozman C., Turk J., Pazek K., Krofta K., Gregoric G. (2012):   Environment and weather influence on quality and market value of hops. Plant Soil Environ., 58: 155-160.
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The paper analyses the influence of four main weather parameters on alpha-acid contents for the main hop variety Aurora (Super Styrian Aurora) in Slovenian production for the time period 1994–2009. Through inspection of correlation coefficients, it tries to find specific times of the year when the weather conditions affect the alpha-acid content with a view to prediction in Slovenia. The most significant time periods of weather that influenced the alpha-acid contents of the Aurora variety during the growing season are identified as attributes of temperatures calculated from the interval from 25th to 30th week (T2530, r = –0.88, P < 0.01), as attributes of rainfall and sunshine from the interval from 25th to 29th week (R2529, r = 0.85, P < 0.01 and S2529, r = –0.75, P < 0.01) and attributes of relative humidity from the interval from 27th to 32nd week (RH2732, r = 0.71, P < 0.01). The attribute T2530 represents the sum of active temperatures from June 18 to July 29 of that year. Similarly, the attribute R2529 corresponds to the rainfall (in mm or L/m2) that fell during the June 18 to July 22 etc.  
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