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Establishment and Growth of Self-Seeded Winter Cereal Cover Crops in a Soybean–Corn Rotation

^a NRCCS, Webster County Field Office, 1202 Banning Street, Marshfield, MO 65706
^b USDA-ARS, National Soil Tilth Lab., 2110 University Blvd.., Ames, IA 50011
^c Dep. of Agronomy, 1126DAgronomy Hall, Iowa State Univ., Ames, IA 50011

View larger version (26K): [in this window] [in a new window]   Fig. 1. Self-seeding cover crop establishment in the fall of 2004 and 2005. The LSD compares plant density within year, date, and species. Letters represent differences among dates, within year, species, and treatment. Only lines with letters were significantly different. Treatments in soybean in 2004 and 2005 were four rows with early (4REB) and late (4RLB) spring glyphosate to eliminate two 19-cm rows and mechanical control, four 19-cm rows with mechanical control (4RNB) only, two rows with mechanical control (2RB), and two rows with no mechanical control (2RBNC).