From 2001 to 2012, each tillage treatments (NT, CP and MP) with and without cover crops had statistically
similar corn or soybean populations in all 12 years (Table 4). Rainfall data for the 2001-2012 growing seasons
are shown in Table 5. From 2002 to 2012, cover crops had no affected soybean yields in 2002 and 2006 (CP
was significantly greater without cover crops) and did not affect corn yields (Table 6). However, the annual average
soybean and the annual average corn yields with and without cover crops for all 3 tillage treatments were
not significantly different (Table 6).