Nutrient leaching from organic cropping systems without livestock, R0-0747
- Local identifier
- R0-0747
- Years operational
- 1998—
- Objective
- Study realistic crop rotations for an organic system without livestock, in this case a system with crop production on a clay soil.
- Description
- The system was adapted to follow the principles for organic farming and regulations for the Swedish certification system for organic farming (KRAV), this was done in collaboration with stakeholders. In the crop production systems, N-fixing crops contribute with N, but also biofertilizers are used, which provide N, P and K. The experiment generated considerable knowledge about nutrient dynamics and losses in organic cropping systems and also about how to manage grass/clover leys and green manure crops in order to reduce leaching risks, for example with timing of harvests and time of incorporation. From 2020, we introduced a somewhat new design in order to investigate strategies for weed control. This is a challenge in organic crop production, where intensive mechanical treatment of weeds often increase the risk of N leaching. Therefore, strategies with row hoeing and cover crops for suppression of weeds is highly interesting. Two strategies are studied, one with high tillage intensity and one where row cultivation and cover crops (where possible) is the main method for weed control. The leys will also be an important component for weed suppression although this is the same for both strategies. During the years, samples for soil mineral N has been taken at different times but in the present strategy no mineral N is determined. Yields of main crop, including leys, are determined every year with analyses of N, P and K and samples of grain are archived. Samples for basic soil chemical properties are taken with six years interval (archived). Water flow is registered and flow-proportional water samples are analysed for Tot-N, Tot-P, NO3-N and K. Staff at Lanna Research Station, SLU perform the experimental work.
- Data Access Statement
- Available to any researcher on request
- Data Access Notes
- An online application form for access to the long-term field experiments or data from these experiments. Seed sample archive available. Request sends to the experimental manager.
- Data license
- Don't know
- Data URL
- https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fwww.slu.se%2Fglobalassets%2Few%2Forg%2Fcentrb%2Flangliggande%2Fgb-ltt-application-form-slu-20140820.docx&wdOrigin=BROWSELINK
- Data policy
- https://www.slu.se/globalassets/ew/org/centrb/langliggande/gb-guidelines_lte_slu_20140820.pdf
- Organizations
- Swedish University of Agricultural Sciences, SLU Agricultural Long-Term Experimentsresearch organisationLanna research stationexperimental research station
- People
- Senior Lecturer Helena Aronssonprincipal investigatorSwedish University of Agricultural SciencesDepartment of Soil and Environment; Agricultural water managementResearcher Lisbet Norbergprincipal investigatorSwedish University of Agricultural SciencesDepartment of Soil and Environment; Agricultural water managementResearch Engineer Maria Blombergdata managerSwedish University of Agricultural SciencesDepartment of Soil and Environment; Agricultural water management
Site: Nutrient leaching from organic cropping systems without livestock, R0-0747
- Local code
- R0-0747
- Location
- LannaVästergötlandSweden
- Geographic location
- 58.3461, 13.1233
- Elevation
- 73 Metres
- Visits permitted?
- Yes
- Soil type
- unknown
- Soil description
- Clay Soil properties are from a field nearby.
- Soil properties
Variable Depth Value (range) Units Ref year Estimated? Baseline? clay content 0 – 30 Centimetres 46.5 Percent 1994 clay content 30 – 60 Centimetres 56.1 Percent 1994 clay content 60 – 100 Centimetres 60.6 Percent 1994 silt content 0 – 30 Centimetres 46.2 Percent 1994 silt content 30 – 60 Centimetres 40.6 Percent 1994 silt content 60 – 100 Centimetres 37.4 Percent 1994 sand content 0 – 30 Centimetres 7.3 Percent 1994 sand content 30 – 60 Centimetres 3.3 Percent 1994 sand content 60 – 100 Centimetres 2 Percent 1994 - Climatic type
- Temperate oceanic climate
- Climate description
- Long-term averages data from Swedish Meterological and Hydrological institute (SMHI), station Lanna. Local climate can be found at https://www.slu.se/fakulteter/nj/om-fakulteten/centrumbildningar-och-storre-forskningsplattformar/faltforsk/vader/lantmet/ the station name is Lanna (25786).
- Climate properties
Variable Time period Value (range) Units air temperature 1961 – 1990 6.1 degree Celsius air temperature 1991 – 2020 7.3 degree Celsius precipitation 1961 – 1990 558 millimeter precipitation 1991 – 2020 584 millimeter
Design period: (1998—)
- Description
- Plot size 40x40 m No. of plots 8 Spacing between tiles 13.5 m Depth of tiles 0.9-1 m Treatment replicates 3-4 Organic set crop rotation Types of fertilizer/amendments organic NP Cover crops sometimes Autumn tillage Crop rotation and treatments in the organic cropping system experiments since 2020 Oats with undersown ley Red clover seed Green manure Oil rape seed Winter wheat Field bean Treatment A Strategy for weeds with leys and repeated stubble cultivation in autumn Treatment B Strategy for weeds with leys, double row spacing and row cultivation during season Main components of crop rotation and treatments in the organic cropping system experiments, 1998-2018 Oats with undersown ley Ley for green manure Oats Winter wheat with undersown ley Ley for green manure Spring wheat Field bean
- Number of plots
- 8
- Number of replicates
- 3
- Crops
Crop Years grown