Research in Agricultural Engineering, 2006 (vol. 52), issue 4
Feed rate measurement technique and yield maps creating in fodder plant harvesting
P. Miklenda, F. Kumhála, V. Prošek
Res. Agr. Eng., 2006, 52(4):123-128 | DOI: 10.17221/4888-RAE 
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...
Load characteristic of tractor three-point hitch for their simulation in laboratory condition
Š. Drabant, Z. Tkáč, M. Mojžiš
Res. Agr. Eng., 2006, 52(4):129-135 | DOI: 10.17221/4889-RAE
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...
Analyzing the production of limited harmful substances from mobile sources of energy in agriculture
J. Homola, B. Groda
Res. Agr. Eng., 2006, 52(4):136-144 | DOI: 10.17221/4890-RAE
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...
Effect of bio-technological agents on the composting process and gaseous emissions production from the composting process
M. Kollárová, V. Altmann, A. Jelínek, M. Češpiva
Res. Agr. Eng., 2006, 52(4):145-151 | DOI: 10.17221/4891-RAE
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...
Granulometric study of Synferta N-22 and Synferta N-17
J. Krupička, B. Hanousek
Res. Agr. Eng., 2006, 52(4):152-155 | DOI: 10.17221/4892-RAE
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.
Influence of heat exposition on the transition behaviour of the steel 21MnTiB
R. Chotěborský, M. Müller, R. Medlín, P. Hrabě, D. Herák
Res. Agr. Eng., 2006, 52(4):156-162 | DOI: 10.17221/4893-RAE
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.