Birdsfoot trefoil is an important legume in many parts of Iowa for improving permanent pastures. No other pasture legume now available compares with birdsfoot trefoil in its ability to withstand continuous grazing. Once established, stands may be expected to furnish high-quality pasture for many years.
Staniforth, D. W. and Scholl, J. M.
"Herbicides for Trefoil Seedings?,"
Iowa Farm Science: Vol. 12
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol12/iss10/2