Research in Agricultural Engineering, 2008 (vol. 54), issue 3
Measurement of water infiltration in soil using the rain simulation method
P. Kovaříček, R. Šindelář, J. Hůla, I. Honzík
Res. Agr. Eng., 2008, 54(3):123-129 | DOI: 10.17221/711-RAE 
: For the measurement of the infiltration speed under operational conditions, we were equipped by a rain simulator with the measuring surface of 0.5 m2. The infiltration speed is determined from the defined rain intensity and water surface runoff from the measured surface. The retained water mass from the surface runoff is recorded at regular time intervals over the whole measuring period. The beginning of the water runoff from the measured surface indicates the beginning of elutriation. The measuring time is finished after the infiltration speed has been stabilised. The beginning of elutriation and infiltration speed stabilisation are typical...
The analysis of the relationship between the electrical conductivity values and the valued soil-ecological units values
M. Mimra, M. Kroulík, V. Altmann, M. Kavka, V. Prošek
Res. Agr. Eng., 2008, 54(3):130-135 | DOI: 10.17221/712-RAE
This article describes the results of the analysis of correlation between the soil electrical conductivity and BPEJ (valued soil-ecological units). The measurements were made in 2006 at the School Agribusiness Land Farm in Lány established by the Czech University of Life Sciences in Prague. The soil electrical conductivity (EC) was measured by the contact method using a sensor with six electrodes. The soil EC data measured were compared with the data obtained from BPEJ maps. The aim was to verify if any relationship exists between the soil EC and BPEJ. The results achieved show that the same dependency exists between the values of the main soil unit...
Research of correlation between electric soil conductivity and yield based on the use of GPS technology
L. Ryšan, O. Šařec
Res. Agr. Eng., 2008, 54(3):136-147 | DOI: 10.17221/714-RAE
A contact method was used for the continuous measuring of soil electric conductivity using a six disc electrodes apparatus. The placement of the electrodes was chosen on the basis of the depth of the profiles surveyed: 0-0.3 and 0-0.9 m. Two Crop Research Institute fields and two private Farma Dolejšová fields were followed in 2004 and 2005. For the treatment of the EC data obtained and of other information, the tools of geostatistic were applied. Arc View GIS software and its module Geostatistical analyst were used for the analysis of the geo-data obtained and for the elaboration of the soil conductivity and crop yield maps. Four variogram models...
Evaluation of the work quality of the sugar beet planter in relation to the sugar beet seed parameters
P. Findura, L. Nozdrovický, P. Tóth, Ľ. Mrázová
Res. Agr. Eng., 2008, 54(3):148-154 | DOI: 10.17221/713-RAE
: Due to the restructuring of the Slovak agriculture managed by the Common agricultural policy of the European union, the acreage under sugar beet has been significantly reduced (32 000 ha in 2003, 27 700 ha in 2006). For the growers with a high intensity of growing, sugar beet has the potential to bring profit. The quality of the crop stand establishment during seeding is considered as the basis for a high yield of the sugar beet roots. Biological and technological properties of sugar beet seed, tillage quality and the quality of the seed placement into the soil have a dominant effect on the value and evenness of the sugar beet field emergence. A...
Verification of applicability of ABB robots for trans-planting seedlings in greenhouses
P. Hůla, R. Šindelář, A. Trinkl
Res. Agr. Eng., 2008, 54(3):155-162 | DOI: 10.17221/715-RAE
The article deals with the verification of applicability of different types of ABB industrial robots for trans-planting seedlings. Initial hypothesis was formulated at the beginning namely that the robots with full rotary series and parallel kinematical structure can be employed in the operation of trans-planting seedlings. Testing was performed on real types of robots IRB 1400, IRB 140T and IRB 140B, and using model application. The robot IRB 340 was tested in virtual simulation only. Based on the measurements, it was found out that all real robots tested are able to perform the operation of seedlings trans-planting involving 36 plants with the cycle...