Large scale exmeriment was established in one growing season (2018/2019) in Hungary, Szeged-Öthalom. Experimental field were 3-3 ha. Applications has the same general agrotechnical control and plant protection, but differed from each other the method of tillage. Our aim was to observe that field cultivator against conventional ploughing, and disc-whether has an effect to the soil physical parameters (soil moisture, mechanical resistance, soil structure),potential yield of oil seed rape and profitability of production. If we ploghed the experimental filed, mechanical resistance was much bigger under the cultivated layer, but it was not created critical soil compaction or plough pan. Because of the mechanical resistance, soil moisture content in the subsoil (30-40 cm deep) was low. Clod forming effect is also determined. For oil seed rape is essential to aggregate soil stuction in the fertile layer, which can be achieve with combinator just before sowing. Unfavorable soil condition influenced development, crop formation, and yield of oil seed rape, furthermore the profitability of production. We have got the lowest yield and profit with conventional ploughing. Primary tillage with disk to 20 cm deep in surface soil evolved enough loose soil structure. In this layer water leaked and soil moisture has better condition. Even deeper layer became harder and drier, which delayed the root development of oil seed rape. Root development has an effect on nutrient and water uptake, thus tillage with disk has a medium yield and profit. Field cultivator with clod breaking roller can be able to change cultivation depth and suitable for stubble stripping, primary tillage, and seedbed preparation too. In this time we have got the best values of physical parameters, and profit from all soil tillage process.

oil seed rape, field cultivator, plough, disc, soil physical parameters, yield, profitability

field crops and pastures

Presentation: poster