Danish researchers cultivated a total of 72 plots of land, half using traditional farming methods including treating them with pesticides, non-organicfertilisers and adding nutrients.
It takes several years to convert land from conventional production to organic production, in part because of the need to free the soil of fertilisers and pesticides.
从传统产品转变成有机产品用了几年时间，部分原因可能是使土地从肥料和杀虫剂的中缓一缓。
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The conference will also look into the environmental impact of the foods people consume, as well as organic produce, which is raised without the use of chemical pesticides or fertilisers.