D2 Integrated Soil Fertility Management
- Local identifier
- D2 ISFM
- Years operational
- 1986—2006
- Description
- ISFM (Integrated Soil Fertility Management) trial; Ibadan (Nigeria); started in 1986 and discontinued in 2006; control, Leucaena alley cropping, Senna alley cropping with and without fertilizer (6 treatments)
- Data Access Statement
- Available to any researcher on request
- Data license
- No data license
- Data policy
- https://www.iita.org/wp-content/uploads/2018/01/IITA-DATA-AND-INFORMATION-MANAGEMENT-POLICY.pdf
- Organization
- IITAresearch organisation
- Person
- Bernard Vanlauweprincipal investigatorIITA
Site: D2
- Type
- research farm
- Location
- Nigeria
- Geographic location
- 7.55, 3.8978113
- Elevation
- 230 Metres
- Slope
- 5°
- Visits permitted?
- No
- Soil type
- lixisol
- Soil description
- Lixisol (following the latest version of the FAO classification)
- Climatic type
- tropical savanna climate
- Climate properties
Variable Time period Value (range) Units air temperature 26 degree Celsius precipitation 1300 millimeter
Design period: (1986—2006)
- Design Type
- Randomized complete block design
- Description
- Plots measure 10 x 18 m
- Number of plots
- 30
- Number of replicates
- 5
- Number of harvests per year
- 2
- Crops
Crop Years grown maize cow peas - Factors
- Factor name
- Factor levels
- alley cropping Each alley cropping plot contained 5 hedgerows and 4 alleys, 4.5 m wide and 10 m longPlot application: Whole plot
no trees (control)
Leucaena leucocephala
A fast growing N fixing leguminous shrubSenna siamea
A fast growing non-N fixing leguminous shrub- NPK fertilizer exposure Plot application: Whole plot
control exposure (0 )
with NPK
- Measurement
Variable Material Units Frequency Scale Comment grain yield trait Not specified annual