The aim of this thesis is to assess the impact of farming on grassland and assess the frequency of use of grassland on yield and quality of forage biomass. A part of this thesis is also a recommendation of possible management changes of evaluated grasslands. Botanical inventory surveys were conducted on agricultural lands Bílovské zemědělské a.s., in the northern Plzeň region. There have been selected three sites, two meadows and one pasture vegetation. The comprehensive analysis of the stand composition was created by agrotechnology of meadows. An important part of this thesis is to assess the impact of different grassland management practices with regard to their economic, social and ecological importance.

The aim of this diploma thesis was to find out the causes of low returns on chosen cereals (oat, wheat, rye, and spelled) in ecological agriculture based on evaluating information on growing procedures obtained via the method of questionnaires. Gradually, 21 ecologically farming companies controlled by the Abcert AB a Biokont CZ, s.r.o. organizations were chosen. Based on the analysis of growing procedures, the most frequent mistakes made by farmers were identified. Companies with lower returns apply mainly an inappropriate structure of crops grown, a high representation of cereals, and they do not respect crop rotation principles. Especially in favourble conditions, some farms are run without livestock production. Leguminosae representation is low in most companies, intercrops are used very seldom. In case of straw plow, the C:N ratio is not maintained using manure. Mineral manure is not used at all, liming very seldom. Vegetation is usually not fertilized during vegetation period. Cereal weed regulation is carried out, but not sufficiently. Using farm seed is quite frequent, which increases the growth of weed. Comparing returns on cereal among better and worse companies, it is obvious that respecting given principles may increase return on seed in 1.0 to 1.9 t/ha.

This diploma thesis deals with the cultivation of fast-growing wood and concentrates on the influence of particular factors like e.g. location, agrotechnology and fertilizers, which have a crucial impact on the phytomass production. Moreover, the thesis evaluates the economic efficiency of this type of sustainable energy ressource, which can be a source of local business. Introductory theoretical chapters describe essentials rules of the cultivation of fast-growing wood. Furthermore the thesis presents general information in this field and proposes suitable wood clones. In addition, the thesis outlines the process of choice and preparation of the agricultural parcel, the usage of various fertilizes, herbicides and agrotechnology. The applied core characterises the business case itself. The primary research compares financial investment and its return of two examined agricultural parcels under the prerequisit of suitable choice of location and agrotechnology. A trail phase depictes the cultivation of fast-gworing wood and discuss presumptions for succesfull business. This thesis is mainly based on primary research. The acquired data are further analyzed and the final chapter attempts to outline the results and suggest measures.

The thesis focuses on catch crops and crop rotation used in conventional agriculture and the possibility of their utilization in anti-erosion protection. The thesis includes a research which describes land consolidation and the main territorial systems which allow anti-erosion protection. Different kinds of erosion and the crop rotation are described in this thesis. The chapter about catch crops is focused on the inclusion of catch crops into the crop rotation. The goal of this study is to assess the real suggested actions used during the land consolidation and to compare their effectiveness with the effectiveness of crop rotation including catch crops.