Soil organic matter in a cereal only cropping system, R3-0020, Säby
- Local identifier
- R3-0020, C-54-1970
- Years operational
- 1970—
- Objective
- The aim of these experiments is to study the change in soil organic matter after long-term exclusive cereal production or at four levels of nitrogen addition and with straw either removed or left in field.
- Description
- The soil organic matter experiments, also called the “humic balance” experiments, consist of two paired experimental series, one with only cereals and one with mostly grass/clover ley, for a total of eight experimental sites. The experiments were started at four different locations between 1970 and 1981. The aim of these experiments is to study the change in soil organic matter after either long-term exclusive cereal production or mixed lay production at four levels of nitrogen addition. Nitrogen is added as mineral fertilizer (Axan, N28). In addition, the effect on soil carbon from removing or leaving the straw is investigated for the cereal experiment. Phosphorus and potassium removed by harvest is calculated for each four year rotation and the corresponding amount is applied as mineral fertilizer during the following rotation. Other plant nutrients are added as needed. Chemical pest and weed control are used. The crop rotation for R3-0020 consists of only cereals, such as winter wheat, spring barley and oats. Crop samples are collected every year and top soil samples every 4th year.
- Data Access Statement
- Available to any researcher on request
- Data Access Notes
- https://www.slu.se/en/departments/soil-environment/research/soil-nutrient-cycling/slu-field-research-plant-nutrition/
- Data license
- Don't know
- Data policy
- Don't know
- Organization
- The Swedish University for Agricultural Sciencesresearch organisation
- Person
- Dr Sabina Braunexperiment managerSLUSoil and Environment
Site: Säby
- Type
- research station field
- Local code
- C-54-1970
- Location
- UppsalaSweden
- Geographic location
- 59.8192, 17.646
- Elevation
- 15 Metres
- Visits permitted?
- Yes
- Visiting arrangements
- Contact information for visits: https://www.slu.se/en/departments/crop-production-ecology/resurser/faltforsok-slu-uppsala/
Design period:
- Design Type
- Split split plot
- Description
- Cereal production or at four levels of nitrogen addition and with straw either removed or left in field. Only cereals in the crop rotation. The same amount of phosphorus and potassium that is removed by harvest during a four-year period is added as mineral fertilizer during the following four-year period.
- Design description
- Four blocks, straw-management in first split and N-level in second split. Sixteen plots total. Plot size 90 sqm.
- Number of replicates
- 4
- Number of harvests per year
- 1
- Crops
Crop Years grown spring oats spring barley spring wheat winter wheat - Factors
- Factor name
- Factor levels
- nitrogen fertilizer exposure
no n (0 kgN/ha)
N40 (40 kgN/ha)
Application frequency: annuallyN80 (80 kgN/ha)
Application frequency: annuallyN120 (120 kgN/ha)
Application frequency: annually- crop residue management process
straw removed
straw left in field
- Measurements
Variable Material Units Frequency Scale Comment soil pH Soil every 4th year plant available phosphorous Soil every 4th year Ammonium acetate lactate (AL method) potassium content Soil every 4th year Ammonium acetate lactate (AL method) soil total carbon Soil every 4th year total soil nitrogen Soil every 4th year grain yield trait All crops Yield, content of N, P and K phosphorous content Not specified Straw (when removed) potassium content Not specified Straw (when removed)
Related publications
- Soil organic C development in cereal and ley systems. Data from 20 years old Swedish field experiments https://doi.org/10.1080/03650340214164 [In English]