Effects of Different Soil Tillage Systems on Yield of Maize, Winter Wheat and Soybean on Albic Luvisol in North-west Slavonia Utjecaj Različitih Sustava Obrade Tla U Proizvodnji Kukuruza, Ozime Pšenice I Soje Na Lesiviranom Tlu Sjevero-zapadne Slavonije

The paper presents comparison of three soil tillage systems in maize, winter wheat and soybean growing on anthropogenic Albic Luvisol in north-west Slavonia, Croatia, during 1996-1999. Tillage systems and implements were: 1. conventional system (CT)-plough, disc-harrow and combined implement, 2. conservation system (RT)-chisel plough and multitiller, 3. no-till system (NT). The aim of testing was comparison of different tillage systems energy requirement and its influence on yield. Results indicate that conventional tillage (CT) system was the greatest energy consumer with 1813.10 MJ ha-1. Comparing to conventional tillage (CT) system, conservation (RT) system with chisel plough and multitiller spent 1133.14 MJ ha-1or 37.5 % less, while no-till (NT) system required even 85.1 % less energy or 270.13 MJ ha-1. In the first season the greatest yield of maize, 7.78 Mg ha-1, achieved conventional tillage (CT) system while next to it was conservation (RT) system with 7.77 Mg ha-1. No-till (NT) system achieved 7.56 Mg ha-1. Second season the greatest yield of winter wheat, 5.89 Mg ha-1, achieved conservation tillage (RT) system. Next to it was conventional (CT) system with 5.75 Mg ha-1, while no-till (NT) achieved 5.73 Mg ha-1. Third season the greatest yield of soybean, 2.71 t ha-1, achieved conservation tillage (RT) system again, while next to it was conventional (CT) system with 2.64 Mg ha-1. No-till (NT) achieved 2.61 Mg ha-1.