Research is confirming that a diverse mix of grasses, legumes and other plants improves pasture and grassland for soil health, animal health and for wildlife.
The Organic Research Centre in the UK has published a summary of results from a recent study that clearly shows the benefits of incorporating more than two species of legumes to help build soil fertility: Legumes: building soil fertility (pdf file)
Legumes such as clover help build soil fertility
They also found that including different grasses in the mix helped:
"There are benefits from the inclusion of