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Abstracts
Proceedings
SOIL TILLAGE STRATEGIES THAT REDUCES THE SURVIVAL OF VOLUNTEER GRASS SEEDS
P. K. Jensen
DIAS, Department of Crop Protection, Research Centre Flakkebjerg, DK-4200
Slagelse, Denmark, E-Mail: PeterK.Jensen@agrsci.dk
The results of three experiments investigating the effects of timing of soil cultivation on survival of volunteer seeds of Poa pratensis and Lolium perenne are presented. Germination in the field of volunteers were followed 2-3 years after grass seed harvest. The highest emergence rate in the second and third year was seen where volunteer seeds were incorporated by ploughing shortly after grass seed harvest. Ploughing late in the autumn or in the following spring reduced the problems with volunteers. Where soil tillage was shallow and the first crop which followed the grass seed crop was established by direct seeding, emergence of volunteers were high in the first year. However, in the second and third year, this treatment had the lowest emergence of volunteers.
Keywords: Soil tillage; ploughing; volunteer grass seed; longevity; Poa pratensis; Lolium perenne