Tag Archives: penetration resistance

790–800 J. Jobbágy, K. Krištof and P. Findura
Soil compaction caused by irrigation machinery
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Soil compaction caused by irrigation machinery

J. Jobbágy, K. Krištof* and P. Findura

Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Machines and Production Systems, Tr. A. Hlinku 2, SK 94976 Nitra, Slovakia, *Correspondence: koloman.kristof@uniag.sk

Abstract:

 This contribution is focused on the analysis of soil compaction with chassis of a wide-span irrigation machine, Valmont. The sprinkler had 12 two-wheeled chassis (size of tyre 14.9”×24”). During the evaluation of soil compaction, we monitored the values of penetration resistance and soil moisture during the operation of the sprinkler. Considering the performance parameters of the pump, the sprinkler was only half of its length (300 m) in the technological operation. In this area, also field measurements were performed in 19 monitoring points spaced both in tracks and outside the chassis tracks. The analysis showed the impact of compression with sprinkler wheels. The results of average resistance ranged from 1.20 to 3.26 MPa. The values of the maximum resistance ranged from 2.30 to 5.35 MPa. The results indicated a shallow soil compaction; however, it is not devastating.

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101-108 K. Trükmann, E. Reintam, J. Kuht, E. Nugis and L. Edesi
Effect of soil compaction on growth of narrow–leafed lupine, oilseed rape and spring barley on sandy loam soil
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Effect of soil compaction on growth of narrow–leafed lupine, oilseed rape and spring barley on sandy loam soil

K. Trükmann¹, E. Reintam¹, J. Kuht¹, E. Nugis² and L. Edesi²

¹Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences,Kreutzwaldi St. 64, 51014 Tartu, Estonia; e-mail: katrin.trykmann@emu.ee
²Estonian Research Institute of Agriculture, Teaduse St. 13, 75501 Saku, Estonia

Abstract:

Soil compaction is an environmental problem and has been recognized as the main form of soil degradation in Europe. Soil compaction may increase soil strength and compacted soil layers can affect root and shoot growth. The aim of this work was to investigate the effect of soil compaction on soil properties and on the growth of narrow–leafed lupine (Lupinus angustifolius L.), spring oilseed rape (Brassica napus ssp. oleifera Hertzg.), and spring barley (Hordeum vulgare L.). The experiment was carried out on the research field of the Estonian University of Life Sciences in the summers of 2004 and 2005 on the sandy loam Stagnic Luvisol. The field was compacted by tractor MTZ-82 (total weight 4.84 Mg) characterized by multiple tire-to-tire passing. Parameters such as plants biomass (roots and shoots) and the changes in physical properties, bulk density and penetration resistance of soil were measured. The results of the present study revealed that the highest increase of penetration resistance and soil bulk density due to the soil compaction occurred in growing spring barley. Although the roots and shoots mass of lupine and oilseed rape increased with increased soil bulk density, there was a very strong negative linear correlation between the roots and shoots weight and soil bulk density on spring barley. A positive correlation was detected between the roots and shoots mass of narrow–leafed lupine and soil bulk density, and soil compaction had a positive effect on the roots and shoots mass of oilseed rape. The study indicates that oilseed rape and narrow–leafed lupine can grow more successfully on compacted soils than can barley.

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