oa Agriprobe - Weed seed bank response to crop rotation at Langgewens

Volume 2, Issue 2
  • ISSN : 1810-9799



Weeds, like all plants, produce seeds to ensure its survival. Only a fraction of the countless weed seeds in the topsoil germinate under favourable conditions to ensure the establishment of annual weeds that will eventually also produce seeds. In the winter rainfall area, like the Swartland, this normally happens in autumn and continues throughout the rainfall period. <br>Weeds are a problem in most cropping systems and their control is essential for successful crop production. Understanding of dynamics of the weed seed bank under the influence of agronomy practices, is essential to improve the decision-making process in weed management. Weed seed bank analysis in long-term trials, provide invaluable knowledge on the effects of agricultural management practices on weed population dynamics (Dorado et al., 1999). This retrospective view may be used to predict improvements in soil, crop and weed management. It depends on weed species present, soil type, climatic condition, crop grown, tillage method and cropping system. Because of the many factors involved, weed control resulting from the use of a given practice often varies among locations and years (Dercksen et al., 1993). <br>The main objective of this study was to determine weed seed bank composition and to asses weed seedling densities in the long term Langgewens crop rotation trial.

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