engleski

Influence of Soil Tillage on the Characteristics of Erosional Drift

Total quantity of erosional drift was measured on Stagnic Luvisol under six tillage treatments in the Central Croatia. The trial involved the following tilling treatments: 1. Black fallow (SBF) ; 2. Tillage up and down the slope (PUDS) ; 3. No-tillage (NT) ; 4. Tillage across of the slope (PAS) ; 5. Very deep ploughing (50 cm - VDPAS) and 6. Subsoiling to the depth of 60 cm + tillage across of the slope (SSPAS). The paper presents the results relating to the main physical and chemical characteristics of natural soil and erosional drift. The intention was to establish whether there is a difference between the texture and chemical properties of natural, not eroded soil and erosional drift removed from the trial plots. The results obtained point to the conclusion that erosional drift was always richer in colloids, that is to say in clay particles. Since more colloid fraction particles were determined in the texture of erosional drift, and since due to its large active surface the colloid fraction is the main nutrient carrier in soil, it is realistic to expect great diversity of chemical properties. A somewhat higher soil reaction value, higher humus content, higher ion exchange capacity and a larger amount of available phosphorus and potassium were regularly determined in all erosional drifts. No-tillage, soil tillage across the slope, growing of high-density crops (winter wheat and oil seed rape) and particularly double-cropping are recommended as efficient practices of sustainable land management on erosion threatened Stagnic Luvisol. The obtained results point to the problem of erosion as one of the main factors of environmental pollution.

tillage; erosion; soil; physical and chemical property of soil

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