Abstract: Tillage is a very important agricultural measure that ensures the appropriate conditions for germination, emergence and growth of plants and it has a great significance in the productivity of cultivated plants. The soils which have a heavy mechanical composition, demand a cultivation system that prevents the degradation processes in the soil and that will preserve the natural fertility of soils. The paper presents the results of some morphological and productive traits of maize depending on the tillage system. The experiment was carried out in the vicinity of Pozega during 2014 and 2015 on the smonitza soil type. The experiment included four tillage systems (CT – Conventional Tillage: autumn plowing + disc harrowing + seedbed conditioner),; RT – Reduced Tillage: disc harrowing + seedbed conditioner),; RT 1 – disc harrowing ; NT- Direct seeding – No tillage) and three maize hybrids (ZP 427; ZP 555 and AS 603). Hybrids were sown in optimal densities. The experiment was set up in a randomized block system with three replications. The following parameters were monitored: the number of plants at harvest, the absolute grain mass and grain yield with 14% humidity. The Number of plants in harvest was determined just before the harvest, counting plants with 14.28 m and multiplying by 1,000 in 5 repetitions.The Results are presented as a two-year average, they were statistically analyzed by analysis of variance and the statistical significance was assessed by an LSD test. Research results show that the number of plants at harvest and yield significantly varied depending on the tillage system, the absolute grain mass showed significantly less variation. The highest average yield (8.87 t ha-1) was achieved with conventional tillage, and the lowest (5.41 t ha-1) with direct seeding (no tillage). Hybrids ZP 555 and AS 603 had statistically significant differences in grain yield in all tillage systems.

conventional tillage, reduced tillage, direct seeding, maize, productive traits

Presentation: oral