A study by ETH Zurich, led by Christian Schöb, has found that mixed crops can yield higher results than monocultures. The research, published in Nature Plants, compared two or four different plant species in mixed culture to monoculture and found significant increases in yield. The success is due to biodiversity, which improves resource use and pest control. However, the study highlighted the need for machines to harvest and sort different crops, which are currently expensive and not widely available. The researchers are now testing seeds specifically bred for mixed cultures.