Effect of soil tillage and N-fertilization in a spring triticale field experiment on soil physical properties and the content of plant available microelements in the soil

A two-factorial field experiment was started in autumn 1996 on a leached br own soil formed from coarse sand (clay 15% and 1.65% of humus). The soil wa s light acid (pH=6.3). The experiment had two factors: different soil culti vation and different nitrogen fertilization. A - conventional soil tillage; B -simplified soil tillage, with double cultivation; C -simplified soil ti llage, with simple cultivation and 3 doses of nitrogen fertilization (1- 60 , 2 - 90, 3 - 120kg N/ha(-1)). On the basis of investigations it was found that: systems of soil tillage and nitrogen fertilization level didn't affec t soil density and pH. With the extension of simplifications, soil volume d ensity increased and organic carbon content decreased. Extension of nitroge n fertilization doses had an influence on the growth of soil volume density and the amount of organic carbon in the soil. Modifications in the soil ti llage didn't influence the quantity of soluble forms of iron and copper in the soil. However, they decreased manganese content and increased the level of zinc. After extension of nitrogen fertilization, an increase of soluble iron and manganese and reduction of zinc and copper were observed. The con tent of all elements was concentrated in arable layer of the soil (0-25 cm) . One didn't state any relationship between physical properties and content of microelements in the soil. On the other hand, numerous positive correla tions between particular microelements accumulated in the soil, and organic carbon and manganese were observed.