1. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Huzsvai László – Rátonyi Tamás – Megyes Attila- Sulyok Dénes IV. ALPS-ADRIA CONERENCE 2 March 2005 Portoroz UNIVERSITY OF DEBRECEN CENTRE OF AGRICULTURAL SCIENCES DEPARTMENT OF LAND USE

2. Soil Tillage THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Arrangement of the long-term tillage experiment Winter plowing Spring plowing Reduced tillage

3. Fertilization Arrangement of the long-term tillage experiment THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES 0 kg N/ha 120 kg N/ha 240 kg N/ha

4. Main components of the DSSAT THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES

5. Available water content of the 110 cm soil profile (Long-term tillage experiment, 2000-2003)

6. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Physical characteristics of the soil in the reduced tillage and the winter plowing treatments

7. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES The formation of nitrogen cycle in the period of 2000- 2003 (winter plowing 120 kg N/ha)

8. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Amount of total nitrogen in the soil (Long-term tillage experiment, 2000-2003) 2000 2003 20002003 2000 2003 2000 2003

9. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Amount of leached nitrogen (Long-term tillage experiment, 2000-2003)

10. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Denitrified Nitrogen (Long-term tillage experiment, 2000-2003)

11. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Nitrogen balance (Long-term tillage experiment, 2000-2003)

12. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Average maize yield in conventional and reduced tillage treatments (Long-term tillage experiment, 2000-2003)

13. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLESConclusions  Nitrogen leaching was bigger in the winter plowing treatment, while denitrification was stronger in reduced tillage plots  Fertilization has increased nitrogen leaching and denitrification  Organic matter content of the soil in the fertilized, reduced tillage treatment did not change during the four year period

14. THE EFFECT OF REDUCED TILLAGE METHODS ON PHYSICAL CHARACTERISTICS OF THE SOIL AND ORGANIC MATTER CYCLES Thank you for your attention !!