Group 1, 1990, Total value of 280.9.
Item 1, Conventional-till value of 136.7 which is 48.7% of 1990.
Item 2, Reduced-till value of 71 which is 25.3% of 1990.
Item 3, Mulch-till value of 53.3 which is 19.0% of 1990.
Item 4, Ridge-till value of 3 which is 1.1% of 1990.
Item 5, No-till value of 16.9 which is 6.0% of 1990.
Group 2, 1992, Total value of 283.
Item 1, Conventional-till value of 120.8 which is 42.7% of 1992.
Item 2, Reduced-till value of 73.4 which is 25.9% of 1992.
Item 3, Mulch-till value of 57.3 which is 20.2% of 1992.
Item 4, Ridge-till value of 3.4 which is 1.2% of 1992.
Item 5, No-till value of 28.1 which is 9.9% of 1992.
Group 3, 1994, Total value of 283.9.
Item 1, Conventional-till value of 111.4 which is 39.2% of 1994.
Item 2, Reduced-till value of 73.2 which is 25.8% of 1994.
Item 3, Mulch-till value of 56.8 which is 20.0% of 1994.
Item 4, Ridge-till value of 3.6 which is 1.3% of 1994.
Item 5, No-till value of 38.9 which is 13.7% of 1994.
Group 4, 1996, Total value of 290.2.
Item 1, Conventional-till value of 111.6 which is 38.5% of 1996.
Item 2, Reduced-till value of 74.8 which is 25.8% of 1996.
Item 3, Mulch-till value of 57.5 which is 19.8% of 1996.
Item 4, Ridge-till value of 3.4 which is 1.2% of 1996.
Item 5, No-till value of 42.9 which is 14.8% of 1996.
Group 5, 1998, Total value of 293.4.
Item 1, Conventional-till value of 106.1 which is 36.2% of 1998.
Item 2, Reduced-till value of 78.1 which is 26.6% of 1998.
Item 3, Mulch-till value of 57.9 which is 19.7% of 1998.
Item 4, Ridge-till value of 3.5 which is 1.2% of 1998.
Item 5, No-till value of 47.8 which is 16.3% of 1998.
Group 6, 2000, Total value of 297.4.
Item 1, Conventional-till value of 127.1 which is 42.7% of 2000.
Item 2, Reduced-till value of 61.3 which is 20.6% of 2000.
Item 3, Mulch-till value of 53.5 which is 18.0% of 2000.
Item 4, Ridge-till value of 3.3 which is 1.1% of 2000.
Item 5, No-till value of 52.2 which is 17.6% of 2000.
Group 7, 2002, Total value of 281.5.
Item 1, Conventional-till value of 114.3 which is 40.6% of 2002.
Item 2, Reduced-till value of 64.1 which is 22.8% of 2002.
Item 3, Mulch-till value of 45 which is 16.0% of 2002.
Item 4, Ridge-till value of 2.8 which is 1.0% of 2002.
Item 5, No-till value of 55.3 which is 19.6% of 2002.
Group 8, 2004, Total value of 276.6.
Item 1, Conventional-till value of 104.4 which is 37.7% of 2004.
Item 2, Reduced-till value of 59.6 which is 21.5% of 2004.
Item 3, Mulch-till value of 48 which is 17.4% of 2004.
Item 4, Ridge-till value of 2.2 which is .8% of 2004.
Item 5, No-till value of 62.4 which is 22.6% of 2004.