Managing Weeds EffectivelyĪ combination of methods is usually the most effective means of dealing with weeds and should include: Refer to the Guide to Field Crop Protection, for tables on yield losses attributed to varying levels of certain weed infestations in conventional cropping systems. Sustainable weed management must be properly planned using all available information. In addition, late weed flushes could provide suitable post-harvest grazing if the field is fenced.Įach situation has to be assessed within the context of the entire farm operation. Similarly, a few weeds in a pea field may reduce wind damage and help raise the pods higher off the ground, allowing for easier harvesting, while late-emerging weeds may not result in a yield loss in that year. For example, grassy weeds such as wild oats or green foxtail in a grain crop being cut as green feed will not reduce its feed value. The presence of weeds in a crop does not automatically result in damage or yield loss. As a result, weed control in organic systems focuses on management techniques designed to prevent weeds, as well as the production of a crop vigorous enough to out-compete weeds. The use of synthetic herbicides, defoliants and desiccants is prohibited. Managing weeds on an organic farm presents a major challenge. Weeds can be defined simply as plants growing where they are not wanted.
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