Ndiaye Long-term Fertility Experiment

Objective
The objective is to assess long-term sustainability of intensive irrigated lowland rice in semi-arid condition. We have 6 treatments (different combinations and amounts of inorganic fertilisers) under double rice cropping per year.
Farm operation data?
Sample archive?
Samples available?
 
Data Access Statement
Available to any researcher on request
Data license
No data license
Data policy
Yes (not online)
Organization
Africa Rice Center
research organisation
People
Kazuki Saito
principal investigator
Africa Rice Center
Ibnou Dieng
data manager
Africa Rice Center

Site: Ndiaye

Type
research farm
Location
Ndiaye
Senegal
Geographic location
16.182389, -16.247412
© OpenStreetMap contributors
Visits permitted?
No
Soil type
gleysol
Soil description
The soil is constituted by deposits of marine origin resulting in a shallow saline ground water table of 20 dS m−1 or more (Ceuppens, 2000). The soil is an orthothionic Gleysol
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
clay content (40 – 54) Percent
Climatic type
warm semi-arid climate
Climate properties
VariableTime periodValue (range)Units
air temperature25 (20 – 30) degree Celsius
precipitation200 millimeter

Design period: (1991—)

Design Type
Randomized complete block design
Description
Plots measure 5 x 5 m
Design description
N is tested with P only and with PK
Number of plots
48
Number of replicates
4
Number of harvests per year
2
Crop
CropYears grown
rice
Factors
nitrogen fertilizer exposure
Plot application: Whole plot
control exposure  (0 )
nitrogen  (60 kgN/ha)
Chemical form: urea
nitrogen  (90 kgN/ha)
Chemical form: urea
nitrogen  (120 kgN/ha)
Chemical form: urea
nitrogen  (150 kgN/ha)
Chemical form: urea
rice variety
Plot application: Sub plot
potassium fertilizer exposure
Plot application: Whole plot
potassium  (50 kgK/ha)
Application method: fertilizer basal application
Chemical form: potassium chloride
control exposure  (0 )
phosphate fertilizer exposure
Plot application: Whole plot
phosphorous  (26 kgP/ha)
Application method: fertilizer basal application
Chemical form: calcium bis(dihydrogenphosphate)
Measurement
VariableMaterialUnitsFrequencyScaleComment
grain yield traitNot specifiedannual