Template-Type: ReDIF-Article 1.0 Author-Name: P. Miklenda Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: F. Kumhála Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: V. Prošek Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Title: Feed rate measurement technique and yield maps creating in fodder plant harvesting Abstract: The main aim of this article is to evaluate the possibility of forage yield maps creating based on mowing machine's conditioner power input measurement. Strong spatial dependence was observed for conditioner power input data. For the data file from material feed rate measurement the medium spatial dependence was calculated. Relatively low value of variograms range is possible to explain by the type of chosen exponential model. Visual displaying of data distribution is done by the maps. These maps were plotted under kriging method. It is possible to observe distributions of higher and smaller values of conditioner power input and material feed rate measurement by this way. Plotted maps are shown in Figures. The correlation coefficients were calculated 0.419 for filtered data. It follows from this evaluation that conditioner power input measurement can be used for the determination of mowing machine material feed rate. Keywords: material feed rate, yield map, moving machine, conditioner, torque meter Journal: Research in Agricultural Engineering Pages: 123-128 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4888-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4888-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0001.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4888-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Š. Drabant Author-Workplace-Name: Faculty of Agricultural Engineering, Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: Z. Tkáč Author-Workplace-Name: Faculty of Agricultural Engineering, Slovak University of Agriculture, Nitra, Slovak Republic Author-Name: M. Mojžiš Author-Workplace-Name: Faculty of Agricultural Engineering, Slovak University of Agriculture, Nitra, Slovak Republic Title: Load characteristic of tractor three-point hitch for their simulation in laboratory condition Abstract: Presented paper is dealing with operation load of three-point hitch (TPH) of agriculture tractor in randomly changeable working conditions and their simulation in laboratory. The basic goal was to obtain experimental data, after which we can judge and analyze problematic of dynamic load of wheel tractor at plowing with orientation on TPH. Another goal was using obtained result from operating measures on their simulation in laboratory conditions by hydrostatic simulator. In presented paper is solved power analysis in each elements TPH of agricultural tractor ZTS 160 45URII A. The tractor during exploiting was in set with four-ploughshare carried and five-ploughshare semi-mounted plough. The measuring was realized for 3 varieties of set speed (gear ratio I/2, I/3, I/1), 3 depths of plowing (20, 25 and 27 cm) and 3 varieties of TPH - positional, mixed and draught control. Keywords: load characteristic, three-point hitch of tractor, plow set Journal: Research in Agricultural Engineering Pages: 129-135 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4889-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4889-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0002.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4889-RAE Template-Type: ReDIF-Article 1.0 Author-Name: J. Homola Author-Workplace-Name: Department of Agricultural, Food and Environmental Engineering, Faculty of Agronomy, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic Author-Name: B. Groda Author-Workplace-Name: Department of Agricultural, Food and Environmental Engineering, Faculty of Agronomy, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic Title: Analyzing the production of limited harmful substances from mobile sources of energy in agriculture Abstract: An expert estimate of the weight of emissions produced in agriculture has been up to now made only through a final counting to the total REZZO 4 emission balance in the category of "other mobile sources" The existing situation is however unbearable since a proper methodology to determine the production of emissions in agriculture, i.e. in the department with a considerable consumption of fossil fuels, is still missing. The solution consists in a more precise specification of the weight of generated limited pollutants (CO, NOx, SO2, PM and VOC including CO2) in the department of agriculture on the basis of the measured annual consumption of fuels in agriculture and with using the emission factors of fuels. Calculated results are compared with the original values finally counted for the REZZO 4 category of "other mobile sources" in 2000 and 2001 (Adamec 2002; Adamec et el. 2003). The calculation revealed that the weight production of individual pollutants in 2000 and 2001 reached only 28% and 27% for CO, 52% and 50% for NOx, 69% and 66% for SO2, 87% and 83% for PM, and 26% and 24% for VOC of the original estimates with final counts and was therefore much lower. The share of agriculture in the weight production of emissions from mobile sources in 2000 and 2001 was 3.1% and 3.1% for CO, 11.5% and 11.5% for NOx, 19.8% and 18.8% for SO2, 38.3% and 34.6% for PM, and 3.5% and 3.6% for VOC. The development of weight production for individual pollutants in the period from 1995-2005 is expressed by means of regression equations. Coefficients of reliability indicate that the measure of reliability of the interval determined by calculation is much higher than that of the reliability interval determined by values estimated through final counting that appear incidental. There are increasing efforts today focused on the replacement of diesel oil as a traditional fossil fuel in agriculture with biodiesel oil as a more environment-friendly fuel. The second part of results includes a monitoring of the impact of biodiesel oil emissions in cases where diesel oil was replaced by this ecological fuel in agriculture in the period from 2000-2005. It follows from the analysis that the weight production of pollutants in 2000-2005 would have been reduced by 4% in CO, by 28% in SO2, by 52% in PM and by 4% in VOC while an increase by 20% and 32% would have been recorded in CO2 and NOx, respectively. Regression equations are used to express the development of the weight production of individual diesel oil and biodiesel oil pollutants in the period from 2000-2005. Reliability coefficients that are of constant character indicate that the development of the weight of pollutants from diesel oil replicates the development of biodiesel oil pollutants. The significance of achieved results consists in the provision of a more accurate general balance of emissions from one of so called other mobile sources in Czech Republic (apart from the department of transport), thus contributing among other things to a more accurate expression of the total weight of emission production within REZZO 4. Keywords: diesel oil, biodiesel oil, emission factor, standard weight of fuel oil, area size under crops, limited harmful substance, pollutant, emission Journal: Research in Agricultural Engineering Pages: 136-144 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4890-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4890-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0003.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4890-RAE Template-Type: ReDIF-Article 1.0 Author-Name: M. Kollárová Author-Workplace-Name: Research Institute of Agricultural Engineering, Prague, Czech Republic Author-Name: V. Altmann Author-Workplace-Name: Department of Machinery Utilisation, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: A. Jelínek Author-Workplace-Name: Research Institute of Agricultural Engineering, Prague, Czech Republic Author-Name: M. Češpiva Author-Workplace-Name: Research Institute of Agricultural Engineering, Prague, Czech Republic Title: Effect of bio-technological agents on the composting process and gaseous emissions production from the composting process Abstract: In the contribution are presented results of two experiments with utilisation of bio-technological agents Bacteriocomposter Plus and Bio-Algeen G40. The effect of these agents on the course of the composting process and emissions production from the composting was investigated. The experiment was also carried out with utilisation of biofilter. The emissions measuring was carried out by the continual method utilising the measuring apparatus INNOVA MULTIGAS (monitor 1312)MultipointSampler 1309 INNOVA. The results of the experiments have confirmed that the bio-technological agents have effect on the reduction of the emissions production from the composting activity. Keywords: controlled microbial composting, biofilter, gas emissions, compost, bio-technological agents Journal: Research in Agricultural Engineering Pages: 145-151 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4891-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4891-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0004.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4891-RAE Template-Type: ReDIF-Article 1.0 Author-Name: J. Krupička Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: B. Hanousek Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Title: Granulometric study of Synferta N-22 and Synferta N-17 Abstract: Physical properties of commercial fertilizers play important role from precision application point of view. Granulometric evaluation is usually performed by sieve separation according ČSN 01 5030 standard. The main subject of this work is the presentation of separation results when vertical airflow is used. Keywords: granulometry, fertilizer, airflow, sorting, particle Journal: Research in Agricultural Engineering Pages: 152-155 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4892-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4892-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0005.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4892-RAE Template-Type: ReDIF-Article 1.0 Author-Name: R. Chotěborský Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: M. Müller Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: R. Medlín Author-Workplace-Name: New Technologies Research Centre in Westbohemian Region - NTC, University of West Bohemia, Pilsen, Czech Republic Author-Name: P. Hrabě Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: D. Herák Author-Workplace-Name: Department of Mechanics and Engineering, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Title: Influence of heat exposition on the transition behaviour of the steel 21MnTiB Abstract: Owing to operations the construction materials change their properties. The material properties and characteristics are considered as the most important. One of properties is the toughness of the used material. Toughness of steel as one of construction materials is expressively temperature-dependent. This dependence - transition behaviour, can vary in dependence of degradation processes which proceed in the material. This paper concerns the problem of the transition behaviour changes of the steel 21MnTiB in dependence on the heat treatment and heat exposition. Keywords: steel, impact energy, transition curve Journal: Research in Agricultural Engineering Pages: 156-162 Volume: 52 Issue: 4 Year: 2006 DOI: 10.17221/4893-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4893-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200604-0006.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:4:id:4893-RAE