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Scale cutoffs and the limits of fractal soil structure

100%

Millan H.

International Agrophysics

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2007

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tom 21

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nr 2

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Studies on horizontal and vertical migration of 90Sr in soil systems

100%

Solecki J., Chibowski S.

Polish Journal of Environmental Studies

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2002

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tom 11

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nr 2

Here are presented results of studies on vertical and horizontal migration of strontium 90Sr isotope in soil systems of Bug river valleys. Mean radioactivity of strontium in these soils was 26.15 ± 22.2 Bq/kg. Atmospheric precipitation of strontium on this area was 0.35 kBq/m2/cm. Radioactivity in soil profiles ranged from 17 to 130 Bq/m2/cm and the isotope was detected even at 30 cm depth. Some tendency to vertical migration of strontium towards the river was noticed. Obtained results were compared with concentrations of calcium and strontium in the soil. Any clear influence of these elements on the migration of strontium 90Sr was noticed.

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Soil nematodes in organic and conventional farming system: a comparison of the taxonomic and functional diversity

84%

Ilieva-Makulec K., Tyburski J., Makulec G.

Polish Journal of Ecology

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2016

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tom 64

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nr 4

Agricultural practices in organic farming theoretically are supposed to lead to higher diversity and activity of soil organisms, which correlates with the stability or resilience of the soil system. In a 3-year study, we tested that hypothesis by comparing the nematode abundance, genera composition and community structure in the soil of winter wheat crop under organic and conventional management. We found the soil type to be a stronger predictor for the total nematodes abundance than the farming system itself. In both systems nematode densities were higher in the sandy than in the clayey soil. Total abundance of nematodes was significantly higher in the organic than conventional farm only in sandy soil and only in the autumn. Significantly more plant feeders was observed in organic than in the conventional crops regardless the soil type. In the clayey soil more bacterial feeders were found in the conventional farm, while in the sandy soil — in the organic one. Nematode generic richness was higher in the organic (a range of 15–35 genera) than in the conventional crops (a range of 15–29) on most sampling dates. Higher generic diversity (H') in the organic crop than in conventional was found for total nematodes in the clayey soil, and for hyphal feeders in sandy soil. H' for plant feeders were higher under organic than conventional system in both types of soil. In both farming systems bacterial feeding genera (Rhabditis, Panagrolaimus, Cephalobus and Acrobeloides) dominated in the communities. Plant feeders and omnivores were found among dominant genera only in the clayey soil, first under both systems, the latter only in the organic crops. The evaluation based on the ecological indices such as Maturity Index, Plant Parasite Index, Enrichment and Structure Index, and ratios between nematode trophic groups, showed that nematode communities under both farming systems most of the time were low matured and the soil food webs strongly disturbed.

4

The hydraulic conductivity of peat and sand mixtures

84%

Walczak R. T., Rovdan E., Slawinski C.

Polish Journal of Soil Science

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2002

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tom 35

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nr 2

Ograniczanie wyników

1 International Agrophysics

1 Polish Journal of Ecology

1 Polish Journal of Environmental Studies

1 Polish Journal of Soil Science

1 Chibowski S.

1 Ilieva-Makulec K.

1 Makulec G.

1 Millan H.

1 Rovdan E.

1 Slawinski C.

1 Solecki J.

1 Tyburski J.

1 Walczak R. T.

1 2016

1 2007

2 2002

Scale cutoffs and the limits of fractal soil structure

Studies on horizontal and vertical migration of 90Sr in soil systems

Soil nematodes in organic and conventional farming system: a comparison of the taxonomic and functional diversity

The hydraulic conductivity of peat and sand mixtures