1. 2007

2. Wir lassen Qualität wachsen Winter rapeseed Variety Trials Point of origin: Cereal Trial technique High use of labour in trials Difficult establishment and high trial errors high Interaction (Genotype x Environment) High Neighbour effect between genotypes

3. 2007 Wir lassen Qualität wachsen Neighbour effects in variety trials of Winter rapeseed caused by:. Genotype. Winter damage. Speed of development. Plant height. Tendency of lodging. Earliness/ripening time

4. 2007 Wir lassen Qualität wachsen Morphological characteristics of tested Winterrape Genotypes Hohenlieth 1999 Büchse (2001)

5. 2007 Wir lassen Qualität wachsen Seed yield (rel.) from Winter rape varieties tested in different plot trial systems Hohenlieth 1999 Büchse (2001)

6. Wir lassen Qualität wachsen Mean Neighbouring Effect (One-sided neighbour) Plant heigth Difference 10 cm= 0,510 Hkg/ha Lodging Difference 1 Note = 0,507 Hkg/ha Genotype Hybrid / Line = 0,662 Hkg/ha from Büchse (2000), Datenbasis:BSV/EU-Versuche 1997, 1998, 1999

7. Wir lassen Qualität wachsen NPZ Plot drilling Machine for Bordered Plots in Winterrape (Draft)

8. Wir lassen Qualität wachsen NPZ-Drillmaschine für Kerndruschparzellen bei Winterraps (Werkphoto)

9. Wir lassen Qualität wachsen Technical specifications for NPZ Bordered Plots (Kerndrusch Parzelle) 1,75 m width of Plots („Centre“) 5 Drilling Rows 28 cm Row distance 63 cm distance between edge rows of Centre and first border rows of 2 on each side of Centre 3,50 m total width of Bordered plot system Strengthening and prolongation of frame of Drilling machine Higher placing of drilling cone.

15. Wir lassen Qualität wachsen Harvest Technique for Bordered Plot system Separation of Centre and Border rows Swathing and harvest of Centre = Harvest plot Or direct Harvest of Centre Total width of Plot combiner ca. 2,10 m

22. Wir lassen Qualität wachsen Advantages of NPZ Bordered Plot system (compared to double plots) Half the working hours by drilling and harvest Very accurate yield-ranking of varieties caused by exclusion of neighbour effects Improving of LSD values as for double plots (can give possibilities for reduction in number of replications) Improved differentiation in lodging (as for double plots) Possibilities for using the border rows for late scoring of stem diseases (Phoma, Verticillium)

23. Wir lassen Qualität wachsen Disadvantages of Bordered plot system (Compared to single- and double plots) Increased need of land for trials (same as for double plots) Bigger tractor (ca. 50 HP) recommended for drilling More working hours for separation of harvest plots and border + manual preparations for swathing Suitable Plot combiner for bordered plot system Need of big combiner for harvest of borders

29. Thank you for your attention