The diversity effects were strong enough to achieve transgressive overyielding, i.e. the mixtures were more productive than the most productive monoculture and the mixtures were more resistant to unsown species invasion than the monocultures.
Blönduáhrifin voru það sterk að blöndurnar gáfu meiru uppskeru en uppskerumesta tegundin ræktuð í hreinrækt og drógu blöndunar úr ágangi illgresis.