In addition, a summary of the brochure is available in an ALB working paper approved by environmental authorities. This so-called ALB worksheet is entitled "Drip irrigation and fertigation for hops." https://www.alb-bayern.de/De/Bewaesserung/BewaesserungsforumBayern/Ergebnisse/hopfenanbau-klimawandel-bewaesserungsmanagement_bef11.html
Detailed research results can also be found in the doctoral dissertation "Needs-based nitrogen uptake of hops (Humulus Lupulus L.) by way of fertigation fertilizer systems" by Dr. Johannes Stampfl.
http://opus.uni-hohenheim.de/volltexte/2021/1889/
Sponsor:
Bayerische Landesanstalt für Landwirtschaft, Institut für Pflanzenbau und Pflanzenzüchtung, AG Hopfenbau, Produktionstechnik (IPZ 5a) [Bavarian State Research Center for Agriculture, Institute for Plant Production and Plant Breeding, AG Hop Production, Production Technology (IPZ 5a)]
Financing:
Erzeugergemeinschaft HVG e. G. (HVG Hop Producer Group)
Project Management:
J. Portner
Team:
A. Schlagenhaufer
Collaboration:
Hallertau hop farms
Duration:
March 1, 2018 to February 28, 2021
Background In the Hallertau, hops are a very densely cultivated specialty crop. Because such intensive cultivation especially of old landraces comes with a huge nutrient demand, nitrogen fertilizer requirements are also correspondingly high. This often results in increased nitrate levels in the soil, especially on farms with generous applications of organic fertilizers. After the harvest, hops obviously no longer absorb any residual nitrogen in the soil. Thus, such excess 29
