Canadian Grain Commission
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Prediction of germination energy of malting barley during long-time storage



General interpretation of RVA results

The following general interpretation of the RVA results and recommendations were developed and can be used to identify barley samples having potential problems during long-time storage and/or storage in hot and humid conditions.

RVA-final viscosity < 100 RVA units

  • Samples with final viscosity values lower than 100 RVA units are pre-germinated, and the probability that they will lose GE after storage is ~95%. They should be malted as soon as possible.
  • ~5% of samples which had the RVA FV values lower than 100 RVA units and retained GE after storage were samples with a very low moisture content.

RVA-final viscosity between 100 and 135 RVA units

  • Samples with final viscosity values between 100 and 135 RVA units are more difficult to categorize. The probability that they will lose GE after storage is ~75% -- the loss will occur especially in samples with high moisture contents.
  • ~25% of samples which had RVA values between 100 and 135 RVA units and retained GE after storage were samples with a very low moisture content.
  • Samples with RVA value between 100 and 135 RVA units have a better chance to retain GE during storage if the storage conditions are good (cool and dry).

RVA-final viscosity > 135 RVA units

  • Samples with final viscosity values higher than 135 RVA units are sound and they should retain GE even after a long-term storage. The probability that they will retain GE after storage is about 99%.
  • 1% of samples that had RVA value > 135 RVA units and lost GE after storage were samples with a very high moisture content.