Vliv vybraných agrotechnických faktorů na strukturní stav půdy při dlouhodobém pěstování jarního ječmene

The thesis deals with the influence of selected agro-technical factors on the structural condition of the soil in the long-term cultivation of spring barley. Assesses the impact of different tillage and crop rotation on the coefficient of structure (KS). Additionally, for selected variants is assessed water stability of soil aggregates. First is a review, which presents characteristic of spring barley and its growing demands, describes the soil structure and its dynamics. Next part consists of statistical evaluation of long-term field experiment in terms of sugar beet growing region. In 2014, it was determined statistically highly significant difference in variants of crop rotation. Crop rotation with a representation of 33.3% cereals showed a higher rate of KS than crop rotation with 66.6 % cereals. Statistically higher KS was observed at a depth of 0-0.15 m, in both years. There was not determined statistically significant difference among the variants of different tillage in both years. Year 2014 in comparison with year 2015 showed a higher coefficient of structure and showed a statistically significant difference. The highest value of water stability of soil aggregates was identified in 2014 at shallow tillage variant, with high significance. In 2015, statistical significance was found at a depth effect only. The outer layer of 0-0.15 m showed higher stability of soil aggregates. With reduction of tillage intensity has been reported to increase the content of agronomically valuable aggregates and also increase their water stability