Tag Archives: infiltration

25-30 J. Chyba, M. Kroulík, J. Lev and F. Kumhála
Influence of soil cultivation and farm machinery passes on water preferential flow using brilliant blue dye tracer
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Influence of soil cultivation and farm machinery passes on water preferential flow using brilliant blue dye tracer

J. Chyba*, M. Kroulík, J. Lev and F. Kumhála

Czech University of Life Sciences Prague, Faculty of Engineering, Kamýcká129, Prague 6 – Suchdol, 16521, *Correspondence: chyba@tf.czu.cz

Abstract:

Objective of this study was the investigation of water preferential flow into the soilby brilliant blue dye tracer, under different soil tillage treatment and different soil compactioncaused by farm machinery passes. Brilliant blue dye tracer measurement was supported by coneindex measurement. Measurement was carried out on land divided into several options:a) controlled traffic farming (CTF) with loosening, b) CTF with deep loosening before plotestablishment, c) ploughing, d) ploughing with deep loosening before plot establishment. Forthe mentioned measurement options the measurements were performed inside and outside of thetrack lines of agricultural machinery. Representation of the brilliant blue dye tracer inside of thetrack lines significantly decreases at a depth of 5–10 cm for all variants. This trend is stabilisedbetween depths of 0.10 m to 0.4 m with colour coverage ranging between 10 and 20%. Aninteresting fact was that the colour coverage outside of the tracks without deep loosening beforeplot establishment was higher than measurement with deep loosening. The largest statisticallysignificant differences occurred at a depth of 0.3 m, while the most homogeneous groups (froma total of four groups) were found at depths of 0.05 to 0.1 m and 0.25 to 0.3 m. Cone indexmeasurement confirmed almost 100% increase in penetration resistance inside of traffic lines(2. MPa) in comparison with measurements outside of the traffic lines (1. MPa) in the range ofdepth from 0–0.16 m.

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385-396 G. Várallyay
The impact of climate change on soils and on their water management
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The impact of climate change on soils and on their water management

G. Várallyay

Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of theHungarian Academy of Sciences, Budapest; e-mail: g.varallyay@rissac.hu

Abstract:

Human activities result in changes in the global environment, sometimes with severe consequences for our future life. Changes in the gas composition of the atmosphere – partly due to CO2 and ‘greenhouse gases’ emission – may lead to a rise in temperature with high spatial and temporal variability, to alterations in the global circulation processes, and to a serious rearrangement of atmospheric precipitation, increasing aridity in some locations. These modifications are reflected sensitively by ecosystems (natural vegetation and land use pattern) and by considerable alterations in soil formation and degradation processes, in soil properties and soil functions.The potential impacts of the forecasted climate change reservoirs are briefly summarizedin the present paper with special regard to soil water management, soil moisture regime and their influences on the main soil degradation processes. Based on this analysis, conclusions are drawn regarding the possibilities of sustainable soil moisture and the required measures of rational control: increasing water use efficiency; reducing evaporation, surface runoff, seepage and filtration losses; increasing water storage capacity and available moisture range of soils.

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