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| Bakken, Anne Kjersti; Breland, Tor Arvid; Haraldsen, Trond K.; Aamlid, Trygve S.; Sveistrup, Tore E.. |
| Temporal changes in the scores of selected soil fertility indices were studied over six years in three different cases of organic crop rotation located in southern, eastern and central Norway. The cropping history and the initial scores of fertility indices prior to conversion to organic cropping differed between the sites. Crop yields, regarded as an overall, integrating fertility indicator, were in all rotations highly variable with few consistent temporal trends following the first year after conversion. On the site in eastern Norway, where conversion followed several years of all-arable crop rotations, earthworm number and biomass and soil physical properties improved, whereas the system was apparently degrading with regard to P and K trade balances... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management. |
| Ano: 2005 |
URL: http://orgprints.org/7855/1/ANNE_KJERSTI_BAKKEN.pdf |
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