Integration of valuable arable wild herbs in intensive cash crop cultivation
Stable yield levels, healthy crops and maximum contribution margins were the focal points of the trial, in which five different crop rotations were compared - from the grain maize-winter wheat rotation to the extensive crop rotation with sugar beet - summer durum - oilseed rape - winter wheat - peas - winter wheat.
Contents and goals
The long-term trial was organised in large plots to ensure easier applicability in practice. Using technology common in practice, four replicates and an individual plot size of 1,200 m² were used, taking into account the suitability for statistical analysis.
The trial was designed to clarify the following questions:
Which crop rotation achieves the highest contribution margin at the location with an even humus balance?
Can stable wheat yields and qualities be produced in all crop rotations?
Which crop rotation achieves the most stable yield level at the location with the lowest possible fluctuations and risk?
Comparison of sugar beet and winter oilseed rape: Together in a 6-field rotation or separately in two 3-field rotations?
The five crop rotations were also analysed with regard to economic and ecological aspects.
In addition, secondary trial questions were investigated as part of the crop rotation trial: Among other things, a comparison of winter wheat varieties was integrated in 2016-2018 and ecologically heterogeneous material in 2022.
Task of the DLG
The DLG is responsible for the entire test facility - from tillage to harvest, including all relevant assessments and the economic evaluation. Numerous project, bachelor's and master's theses were supervised by the DLG throughout the entire trial period.
Results
An initial conclusion: It is not only the yield achieved from the individual crops that should be decisive when considering crop rotation. Factors that are difficult to quantify in monetary terms, such as the effect on the soil structure or the conscious use of active ingredients, are additional important aspects for sustainable farm management.
Interim report 2013-2017 Evaluation of variety comparison 2016-2018 Harvest results 2021
Publications in the DLG members' newsletter (in German)
Aus dem IPZ: Raps-Ernte in den Versuchen | 2021/29
Der frühe Weizen bringt den Ertrag? | 2021/33
Unerwartet hohe Zuckergehalte am IPZ | 2021/44
Der Körnemaisdrusch am IPZ | 2021/48
Wie viel Ertrag kostet die Trockenheit? | 2022/30
Heterogenes Material in der Fruchtfolge | 2022/49
Project duration
from 2013 to 2023
Project responsibility
Contact person at the DLG
Siv Biada, Head of the International DLG Crop Production Center
s.biada@dlg.org | +49 3471 68484-11
Coordination
DLG e. V.