[Investigations on influence of herbicide use and weeds on soil microflora in winter rape crops]

alopecurus myosuroides arable soils bacteria boden brassica napus carbetamida carbetamide enzym enzymic activity flora microbiana flore microbienne herbicidas herbicide herbicides herbizid lamium malezas mauvaise herbe metazachlor microbial flora mikroorganismus nebenwirkung sol arable stellaria stellaria media suelos cultivables trifluralin trifluralina trifluraline ungras unkraut weeds