eragrostis minor, achillea millefolium, artemisia vulgaris, calamagrostis epigejos, digitaria sanguinalis, lepidium ruderale, lolium perenne, plantago major, poa annua, poa pratensis, argentina anserina, capsella bursa-pastoris, chenopodium album, cirsium arvense, erigeron canadensis, hordeum murinum, lotus corniculatus, portulaca oleracea, potentilla reptans, scorzoneroides autumnalis, setaria viridis, trifolium repens