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| Demsar, D.; Dzeroski, S.; Larsen, T.; Struyf, J.; Axelsen, J.; Bruus-Pedersen, M.; Krogh, P.H.. |
| In agricultural soil, a suite of anthropogenic events shape the ecosystem processes and populations. However, the impact from anthropogenic sources on the soil environment is almost exclusively assessed for chemicals, although other factors like crop and tillage practices have an important impact as well. Thus, the farming system as a whole should be evaluated and ranked according to its environmental benefits and impacts. our starting point is a data set describing agricultural events and soil biological parameters. Using machine learning methods for inducing regression and model trees, we produce empirical models able to predict the soil quality from agricultural measures in terms of quantities describing the soil microarthropod community. We are also... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2006 |
URL: http://orgprints.org/7992/1/7992.pdf |
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| Axelsen, J.; Thorup-Kristensen, K.; Askegaard, M.; Krogh, P.H.. |
| The abundance and species composition of soil living mites and Collembola were investigated in autumn and winter in field plots with five different types of catch crops and a control plot that was kept free of vegetation. The catch crops, chicory, white clover, garden lupine, and perennial ryegrass were undersown in barley while fodder radish was sown after harvest .The investigation was carried out at a site on sandy loam and a site on coarse sand. At the sandy site densities up to about 250.000 and 100.000 m-2 of mites and Collembola, respectively, were found. At the sandy loam site densities were up to 120.000 mites m-2 and 150.000 Collembola m-2. The densities of both microarthropods were extremely high with up to 120,000 Collembola m-2 and 90,000... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2006 |
URL: http://orgprints.org/7988/1/7988.doc |
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| Axelsen, J.; Bruus-Pedersen, M.; Larsen, T.; Krogh, P.H.. |
| Soil fauna diversity, as well as total mite and springtail numbers was correlated with soil type, tillage intensity and fertiliser use as well as crop and grazing history and duration of the current state of the field. 430 samples taken in 2002 on a wide range of organically farmed fields also showed that soil type interacted with crop type and grazing intensity. A higher number of mites and springtails were found in crops that included clover, almost independently of soil type. Higher numbers of mites were found at high grazing intensity compared to low grazing intensity on the same soil type. In 2003, microarthropods were collected in spring, summer and autumn in Southern Jutland, Mid-Jutland and Sealand. In each region both cereal and vegetable fields... |
| Tipo: Journal paper |
Palavras-chave: Biodiversity and ecosystem services; Soil tillage. |
| Ano: 2006 |
URL: http://orgprints.org/7981/2/7981.pdf |
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