hordeum murinum, plantago major, amaranthus powellii, artemisia vulgaris, atriplex patula, ballota nigra, bromus tectorum, capsella bursa-pastoris, chenopodium album, convolvulus arvensis, elymus repens, lactuca serriola, lolium perenne, medicago sativa, poa annua, populus nigra, echium vulgare, persicaria lapathifolia, poa compressa, torilis arvensis, triticum aestivum