Legumes were A mixture of atrazine (1.0 kg a.i. ha−1) and
inoculated prior to planting with the appropriate metolachlor (1.9 kg a.i. ha−1) was applied precommercial
inoculant. In 1993 the three controls emergence to the chemically treated control plot
were hand weeded, chemically weeded and using a bicycle-wheel plot sprayer. The cover crops
unweeded treatments.