2020 Volume 66 Issue 2 Pages 75-80
Dry matter yield of corn (Zea mays L.) and Italian ryegrass (Lolium multiflorum Lam.) with double cropping was compared from May 2015 to September 2017 using two types of reduced tillage system (RTS) and the conventional tillage (plowing) system (CTS). The RTS used a vertical-axis type harrow and vacuum seeder (RTS1) or no-tillage seeder (RTS2) for seeding corn, and a disk harrow or vertical-axis type harrow for seeding Italian ryegrass. In RTS1, the average dry matter yield of corn for the three years was 1929kg/10a, while that of Italian ryegrass for two years was 1131kg/10a. In the CTS, the average dry matter yield of corn was 1915 kg/10a, and that of Italian ryegrass was 986kg/10a. The difference in annual dry matter yield between the RTS1 and CTS was not statistically significant. However, with the RTS2, dry matter yield of corn decreased from that in the CTS during the second year of the experiment. Dry matter yield of Italian ryegrass was not significantly different among the tillage systems
