Trends in the botanical composition of set-aside fields in north-east Scotland uncultivated for five years

abandoned land agrostis capillaris agrostis gigantea biodiversidad biodiversity botanical composition cirsium composition botanique dactylis glomerata ecological succession farming systems grasslands herbage holcus holcus lanatus malezas mauvaise herbe plant succession plante toxique poa annua poisonous plants praderas ranunculus rumex senecio senecio jacobaea species diversity tierras abandonadas trifolium repens weeds