[Weed development by conversion to ecological management on the Frydenhaug Field, NLH [Agricultural University of Norway]]

abonos verdes agricultura alternativa agriculture alternative alternative agriculture avena banco de semillas del suelo cultivation cultivo engrais vert espacement espaciamiento green manures hordeum leys malezas mauvaise herbe noruega norway plant competition pradera temporal prairie temporaire pratique culturale rendement rendimiento rotation culturale rotational cropping soil seed banks sostenibilidad spacing stock semencier du sol sustainability trifolium weeds yields