Sprays of certain "drying" or dessicating chemicals have increased yields of birdsfoot trefoil in tests at the Iowa Agricultural Experiment Station. Such sprays reduce the moisture content of green plant material and permit easier combine harvesting before seed losses from shattering occur.
Iowa Farm Science Editorial Board
"Your Experiment Station Reports - Other Grains,"
Iowa Farm Science: Vol. 10
, Article 7.
Available at: https://lib.dr.iastate.edu/farmscience/vol10/iss1/7