Archived
This content is available here strictly for research, reference, and/or recordkeeping and as such it may not be fully accessible. If you work or study at University of Kentucky and would like to request an accessible version, please use the SensusAccess Document Converter.
Publication Date
1997
Location
Manitoba and Saskatchewan
Description
N balance in a full-scale experiment with conventional and ecological farming systems at Öjebyn in northern Sweden was calculated with a nutrient flow model. Due to increased milk production there was a yearly increase in both N-input and output. Nfixation was on average twice as large in the ecological system. The farm N balance was increasingly positive in the conventional system and negative in the ecological. The soil N balance was more negative in the ecological system and less positive in the conventional system. Conclusions are: (1) ecological farming is possible without immediate DM yield reductions, but with negative effects on N balances, (2) sustainability is measured more stringently by soil balance than by farm balance, (3) estimates of N-losses need to be adjusted for north Swedish conditions.
Citation
Fagerberg, B, "Nitrogen Cycling in a Ley-Dominated Production System" (1997). IGC Proceedings (1985-2023). 9.
(URL: https://uknowledge.uky.edu/igc/1997/session20/9)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Nitrogen Cycling in a Ley-Dominated Production System
Manitoba and Saskatchewan
N balance in a full-scale experiment with conventional and ecological farming systems at Öjebyn in northern Sweden was calculated with a nutrient flow model. Due to increased milk production there was a yearly increase in both N-input and output. Nfixation was on average twice as large in the ecological system. The farm N balance was increasingly positive in the conventional system and negative in the ecological. The soil N balance was more negative in the ecological system and less positive in the conventional system. Conclusions are: (1) ecological farming is possible without immediate DM yield reductions, but with negative effects on N balances, (2) sustainability is measured more stringently by soil balance than by farm balance, (3) estimates of N-losses need to be adjusted for north Swedish conditions.
