Umwenda wa fibre fibre ni imikorere-mikorere idasanzwe ya organique idafite ibyuma bishya bifite ibintu byiza cyane nkuburemere bworoshye, imbaraga nyinshi, kurwanya ubushyuhe bwo hejuru no hasi, kurwanya ruswa, kwikingira, kutagira umuriro, kwinjiza amajwi, kubika amashanyarazi, hamwe nurwego runaka rwo gukora neza.