National Repository of Grey Literature 7 records found  Search took 0.00 seconds. 
Influence of application of activators of vital soil functions on selected soil characteristics at ZS Sloveč, a.s.
Novák, Václav ; Šařec, Petr (advisor) ; Šařec, Ondřej (referee)
This thesis covers issues of soil physical properties changes after the application of farmyard manure, industrial fertilizers or substances which aim for improvement of vital soil properties. The first part of the thesis is focused on soil issues and besides other things it covers types of soil degradation or physical soil properties. In the next part of the thesis there is a focus on substances which improve physical soil properties. Biochar and other representative products of company PRP Technologies are described in this part. The practical part of this thesis describes selected properties changes which have arisen after a year of field trials in company Zemědělská společnost Sloveč, for example changes in traction or penetration resistance. The last part includes the summary of results, conclusion and the recommendation of author.
Proposal of suitable farm implements and technologies for tractors of over 250 kW at a selected agricultural business
Šebek, Jan ; Šařec, Ondřej (advisor) ; Jiří, Jiří (referee)
Diploma thesis is dealing with proposal of suitable farm implements and technologies for tractors of over 250 kW according to chosen methodologies at agricultural business AGRO Slatiny a.s. The introduction specifies a brief characteristic of selected agricultural business which is followed by a description of soil processing methods and comparison of wheeled and crawler tractors. In the next section there is a characteristic of 3 powerful tractors of over 250 kW and implements which are used by those tractors for soil preparation. Furthermore there is a specification of main objective and applied methods. The main goal was calculation of original implement's parameters in regards to work efficiency and economic evaluation. In case of unsatisfactory results the objective is to propose new implements in order to work more efficiently and have better economic results.
Comparison of tractors of power range up to 200 kW
Svatoš, Ondřej ; Šařec, Ondřej (advisor) ; Šařec, Petr (referee)
Aim of this bachelor thesis is to apprise the reader with wheeled tractors, which are available to buy on the market. In the first part there is explained a brief history of tractors, structural parts of tractors and technologies used in the modern agriculture machines. The second part of this task is focused on comparison of five selected tractors of power range 150 to 200 kW. The last part is a summary of the comparion and conclusion.
Comparison of tractors of power range over 200 kW
Maštalíř, Jakub ; Šařec, Ondřej (advisor) ; Kavka, Miroslav (referee)
The aim of this work is to compare tractors with power over 200 kW, according to selected criteria. The first part deals with the construction of tractors and explanation of the function principle of technologies used in them. The second part is devoted to the presentation of several selected international tractor manufacturers. The third part is focused on the comparison of tractors according to specified criteria. There is presented comparative method, description of chosen tractors and the result of my comparison. In the final part is explanation of the result of comparison and summary of the bachelor thesis.
Comparison of tractors of power range over 100 kW
Láska, Daniel ; Šařec, Ondřej (advisor) ; Žemličková, Nikola (referee)
The aim of the work is to compare and evaluate tractors based on chosen parameters. Chosen parameters of selected tractors are rated with points and based on the amount of points gained, recommended tractor is selected.
Comparison of tractors of power range up to 150 kW
Harnisch, David ; Šařec, Ondřej (advisor) ; Balada, Ivo (referee)
The objective of this work is to compare tractors up to 150 kW of performance class in selected technical, economic and exploitation parameters. The first part of this Bachelor Thesis deals with the history of development of tractors, as well as the description of constructional parts of a tractor. The next part of this work is focused on several chosen tractors and their characteristics. This is followed by the comparison of these selected tractors and the determination of their final ranking. The conclusion summarizes all of the gained knowedge.
Influence of application of activators of vital soil functions on selected soil characteristics at Agrovýzkum Rapotín s.r.o.
Blaha, Josef ; Šařec, Ondřej (advisor) ; Ladislav, Ladislav (referee)
This thesis describes and evaluates changes of selected physical properties using various excipients, manure and fertilizer. The first part is a literature review prepared for introduction to the soil and soil properties. Further analyzes the problem of soil improvers and their division. Selected soil substances are described in detail in some of the chapters. Subsequently describes some previous attempts substance PRP SOL. The evaluation of the impact on the application of the plant is working in Chapter 4 are listed first, soil and climatic conditions of the land block, which are made different versions of the test. Further I describe the evaluation of selected soil properties, which include, bulk density, soil moisture penetration resistance, infiltration capacity of soils and soil traction resistance when processing a disc harrow. The final chapter is devoted to a discussion of the assessed properties and the overall summary of the attempt.

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