The thesis Effect parameters stand on the work of the combine, deals with the relationship between grain yield per hectare and loss of grain per hectare. Measurements were carried out on axial harvester. When measurements were compared to the value of losses at different yields and different setting combine. The job losses were measured on grain crops of spring barley, winter wheat and oilseed rape. Changing the setting was focused on the speed of the rotor, the gap baskets, fan speed and the gap of the upper and lower sieves. These setting values are compared with the original factory settings. They were compared to losses of grain and fuel consumption at each setting with the same yield.

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In teoretical part of this thesis are described setting of lawn and his maintenance. In this thesis are listed basic species of grasses which are contained in grass mix and fertilizers which were used during practical experiment. Due to the uniqueness of this experiment, literary research contained only basic information about natural extracts. Practical experiment consisted of preparing soil, setting up a lawn and followed by aplication of natural extracts and fertilizers. During experiment was monitored seed germination, weight of biomass in two period, colour spektrum of leaf surface and lawn condition. Results were monitored in four varietes and each of them was performed in 3 repetitions. The best results of germination was monitored in variety 2 (Extract). The ideal development of biomass was monitored in variety 3 (Extract + fertilization).

This diploma thesis studies the external layers of water-stable aggregates found in different soil types. The selection of locations in which the soil samples were taken was dependent upon different soil types, economic interventions, and the age of forest vegetation. A total of twenty soil samples from the top mineral layer of soil were collected from five locations. The soil samples were subsequently tested for the stability of water-stable aggregates, and sent for a digital as well as grain size analysis. The tests revealed different values in the amount of surface area, aggregates volume, and contents of clay in soil. Water-stable aggregates found in the same soil type showed a similar trend in the amount of surface area and aggregates volume depending on the age of forest vegetation.

The aim of the thesis was to evaluate the formation of preparing birch stand and the growth of silver birch underplanting. The measurements were realized in 2015 – 2018 in TVP Skrchov. The area was divided into 4 variants; no heavy thinning, intensity heavy thinning 50 %, 30 % and silver fir gap. In the birch stand there was evaluated breast-height diameter and its growth, basal area and by Shädelin tree classification the target trees were chosen. The silver fir underplanting was measured for mortality, root colar diameter, height, diameter growth, height increment, health condition, and the size of crown projection. The best value had the birch stand with thinning intensity of 50 %. In this stand there was reaction of release after heavy thinning. On the other hand the lowest value of production had the birch area without heavy thinning. Nevertheless, the value of slenderness ratio was high (110 – 120) and the share of green crown was low (33 – 35 %) for all variants. It shows worse vitality and stability of the birch stand and it indicates the late heavy thinning. The silver fir grew best in the gap where it had the highest diameter growth, height increment, healty condition and lowest mortality. The best of underplantings was the silver fir grown under the birch stand without heavy thinning. The worst results had the silver fir with 50 % of heavy thinning intesity.

The aim of this thesis was to assess the impact of different intensities of fertilization on species composition and grassland quality on the experimental area Kameničky in 2009-2013. The evaluated factors, the intensity of fertilization in the degree of unfertilized, PK, N90+PK and N180+PK. Fertilized grassland do not always have high species diversity. The highest and during these years of balanced species diversity was assessed in grassland fertilization PK, while the lowest in the stands fertilized N90+PK. The proportion of grasses fertilized with than most increased (P<0,05) in the variant N90+PK (60,3%) at the expense of other herbs (33,7%). Development of legumes in the stand shown (P<0,05) increased fertilizer PK (14,8%). The quality of the grassland was lowest in unfertilized variants (24,76), nitrogen fertilization increases its value (61,67).

Topic of the thesis deals with the influence of fertilization on qualitative and quantitative characteristics of semi-natural grassland. The aim is to assess the effect of fertilization, timing of grass cutting (1st cutting, 2nd cutting, 3rd cutting) and a use of plants (double-cut, triple-cut) on organic nutrient content (crude protein, crude fibre, water soluable carbohydrate, digestibility of crude protein), ash plants, diversity of the species and yields of semi-natural grassland. Research was done in the years 2011 and 2012. Intensity of fertilization is graded as following: Not Fertilized, Fertilized 30P+60K, Fertilized 45N+PK, Fertilized 90N+PK, Fertilized 135N+PK and Fertilized 180N+PK. Semi-natural grass is based on a station in the area of Zdarske Vrchy. Lowest yields were assessed on unfertilized grassland and on the other hand the highest yields were assessed on the fertilized grassland 180N+PK. Major differences (P<0,05) in crude protein and digestible of crude protein were in between the cuttings during 2011 and 2012. Hill's diversity index showed higher values at triple-cut grassland. The highest values of fertilisation had the PK type of fertilisation. The fertilisation had some positive influence on (P<0,05) occurence of Alopecurus pratensis L., Poa pratensis L. in the grassland. The fertilisation subdued occurence of Ranunculus acris L., Carex spp., Anthoxanthum odoratum L. and other less nutricious species. The quotient of clover was increased (P<0,05) after the application of PK. However it was decreased (P<0,05) after the application of nitrogen.