Login Create Account Sommarmellangrödors ogräsbekämpande egenskaper - resultat från två fältförsök More recent experiments with C. The summer intermediate cover crops with the best weed competitive characteristics at both experimental sites were oilseed radish, facelia and buckwheat, while sudan grass had the lowest ability to compete with weeds. Detta under förutsättning att mellangrödorna etablerar sig bra och att de har en god tillväxt under sommaren och hösten. Fertilization of summer cover crops by about 40 and about 50 kg of nitrogen per hectare generally resulted in more weeds in Norra Åsum, and fewer at Lilla Böslid, where the weed flora was dominated by Corn Spurrey.
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Summer cover crops, which were sown July 20 at Norra Åsum, gave the biggest biomass yield in October 13 85 growing days.
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Field trials will be performed in central Sweden during and Parallel experiments will be performed under controlled conditions. Ju större sommarmellangrödans biomassa var desto lägre blev ogräsvikten. Sudan grass in combination with hairy vetch, however, gave higher yield on November 7 growing days. In Norra Åsum generally more weeds were found in the fertilized plots. One of the main challenges in organic farming is to achieve a long-term control of populations of perennial weeds, especially Elytrigia repensCirsium arvense, and Sonchus arvensis. The opposite was true at Lilla Böslid where the weed flora was dominated by Corn Spurrey.