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| Pietola, Liisa. |
| Phosphogypsum from Siilinjärvi plant were tested in soil incubation-leaching-studies(I), and in liquid pig manure treatment (II) in farm pit. In soil columns, gypsum additions significantly reduced erodibility and ortho-P concentrations in the leaching water. In the pig manure test, the gypsum-based precipitate fractionated phosphorus to P-rich sediment and to almost P-free upper part. Upper low-P fraction represented 2/3 of the total manure volume. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/16046/1/fosfor1.pdf |
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| Rasa, Kimmo; Räty, Mari; Nikolenko, Olga; Horn, Rainer; Yli-Halla, Markku; Uusi-Kämppä, Jaana; Pietola, Liisa. |
| Water repellency index R was measured in a heavy clay and a sandy loam, used as arable land or buffer zone (BZ). Further, effect of management practise and ageing of BZs were studied. Water repellency was proved to be a common phenomenon on these soils. Harvesting and grazing increased water repellency as does ageing.Low water repellency is supposed to prevent preferential flows and provide evenly distributed water infiltration pattern through large soil volume, which favours nutrient retention. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects. |
| Ano: 2006 |
URL: http://orgprints.org/16280/1/pollutants6.pdf |
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| Rankinen, Katri; Palojärvi, Ansa; Regina, Kristiina; Pietola, Liisa; Granlund, Kirsti; Uusi-Kämppä, Jaana. |
| The retention of nutrients by 10-m-wide grass buffers and buffers under natural vegetation has been studied over 10 years in Jokioinen in southwestern Finland. The results have been compared with those from 70-m-long plots without buffers. Grass was sown on the adjacent field and plots without buffers in 2002, and the field plots and these were grazed for 12 and 24 days in summer 2003 and 2004, respectively. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects. |
| Ano: 2006 |
URL: http://orgprints.org/16261/1/pollutants3.pdf |
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| Räty, Mari; Horn, Rainer; Rasa, Kimmo; Yli-Halla, Markku; Pietola, Liisa. |
| Soil structure that favours infiltration is essential for successful functioning of vegetated buffer zones. We measured bulk density, air permeability and precompression stress in a clay soil (Vertic Cambisol) and a sandy loam (Haplic Regosol) in Finland, to identify management-related changes in the physical and mechanical properties in the surface soil of buffer zones. In addition, the impact of texture on these properties was studied at depths down to 180?200 cm. Soil cores (240 cm3) were sampled from a cultivated field, from buffer zones harvested by grazing (only in a clay soil) or by cutting and removing the vegetation, and from buffer zones covered with natural grass vegetation. The samples were equilibrated at a matric potential of -6 kPa and... |
| Tipo: Journal paper |
Palavras-chave: Soil. |
| Ano: 2010 |
URL: http://orgprints.org/17183/1/r%C3%A4ty.pdf |
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| Vanhala, Petri; Pietola, Liisa. |
| Amendment of soil with peat is an attempt to avoid crop yield variation in the transition to conservation tillage, as it improves seedbed conditions and crop growth in drought-sensitive clay soils. Weed infestations were compared in 1999-2000 between the original and peat-amended clay (Typic Cryaquept, very fine, illitic or mixed) under different autumn tillage systems in an oats-barley rotation. In a field experiment, sphagnum peat (H = 4) had been spread (0.02 m 3 m -2 ) on the soil surface in August 1995. Tillage treatments included mouldboard ploughing (to 20 cm) and stubble cultivations of different working depths (8 or 15 cm) and intensity (once or twice). Weed biomass and density were assessed by an area of 1 m 2 per field plot in August 1999-2000... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2003 |
URL: http://orgprints.org/16752/1/vanhala.pdf |
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