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JECAM | Joint Experiment for Crop Assessment and Monitoring

Mali - Koutiala

Project Overview

The mapping resolution is sub-meter to 5-m. The timeliness (with regards to growing season) is 01 April- 30 November. Research activities on crop identification and acreage estimation will be linked to those on crop biophysical variables characterization.


Project Reports


Implementation Plans

1. Crop identification and acreage estimation:

2014: Algorithms development and calibration in Kani-Sukumba (Mali)

2015: Algorithms validation and crop area mapping in Sukumba, Kani, Nanposela (Mali)

2. Residue and Tillage mapping: n/a

3. Soil moisture: n/a

4. Crop biophysical variables:

2014: Development of spectral, temporal and contextual (textural) libraries in Sukumba (Mali)

2015: field-to-landscape scale yield and biomass prediction for Sukumba (Mali)

 

5. Other: n/a

The current project phase is research. The proposed project builds on 2002-2013 research investments in the locality of Sukumba under projects ‘Carbon From Communities’ (NASA, 2002-2004), ‘Soil Management CRSP’ (USAID, 2002-2007), ‘Seeing Is Believing – West Africa’ (AgCommons/BMGF, 2009-2010) and Dryland Systems CRP (CGIAR, 2013-present). It also leverages the upcoming ‘Imagery for Smallholders – Activating Business Entry points and Leveraging Agriculture’ (ISABELA) project (BMGF, 2014-2015).


Site Description

Locations

Mali - Kani-Sukumba
Site Extent   Centroid: 12.176142, -5.189662
Top left: 12.220957, -5.235968 Bottom Right: 12.13132, -5.143373

Mali - Nanposela
Site Extent   Centroid: 12.329, -5.3225
Top left: 12.392, -5.387 Bottom Right: 12.266, -5.258

Typical field size range: 1.4±1.2 ha.

Dominant crop types are:

Typical field rotations are:

However, although these are the most common rotations observed, deviation from these is the norm rather than the exception.

The typical cropping calendar is:

Sowings vary significantly inter-annually depending on the onset date of rains. Continental West Africa is among the regions of the world where onset date of rains is most variable and unpredictable. Wild and domesticated plants have evolved traits to evade the associated risk, such as photoperiod sensitivity.

The climatic zone is ‘tropical wet and dry or savannah’ (Aw in Koppen’s classification). Climate (in nearby Koutiala, 1971-2000) is subhumid with annual rainfall ranging from 704 mm for a dry year (probability of exceedance =0.9) to 838 mm for a median year (=0.5) and to 1,058 mm for a wet year (=0.1).

Soil Texture

Soils include Haplustalfs (PIRT, 1983 local soil classification: PL9, PS3), Haplustults (PL11), Cuirorthents (TC5), and Cuirustalfs (TC4) with shallow slopes, locally significant rock outcrops, and few erosion gullies. Sandy loams dominate. More complete corresponding soil profile information is provided in annex 1 in DSSAT format.

Landscape Topology

Landforms, distribution of soils and cropping systems is analogous to that reported by van Staveren and Stoop (1985):

Figure 1a: schematic representation of soil conditions, water movement and cropping systems along a comparable toposequence in Kamboinse, Burkina Faso (van Staveren and Stoop, 1985)

Figure 1b: schematic representation of relationships between staple crops, sowing dates, and land types for a comparable toposequence in Burkina Faso (van Staveren and Stoop, 1985)

Soil Drainage Class

Most soils (PL11, PS3, TC4) are well drained. Some are imperfectly (PL9) or somewhat excessively (TC5) drained.

Other Site Specifications

Irrigation infrastructure is absent. Lowlands are used for high value crop (vegetables, orchards) and locally rice production. A map of the project site is provided in annex 2.

 


Specific Project Objectives & Deliverables

Specific Project Objectives and Deliverables

 

 

 


In Situ Observations


EO Data Requirements

Approximate Start Date of Acquisition:
Approximate End Date of Acquisition:
Spatial Resolution:
Temporal Frequency:
Latency of Data Delivery:
Wavelengths Required:
Across Swath:
Along Track:

SAR Data Requirements

Approximate Start Date of Acquisition:
Approximate End Date of Acquisition:
Spatial Resolution:
Temporal Frequency:
Latency of Data Delivery:
Wavelengths Required:
Polarization
Incidence Angle Restrictions:
Across Track:
Along Track:

Locations

Mali - Kani-Sukumba

Centroid
Latitude: 12.176142
Longitude: -5.189662

Site Extent
Top left
Latitude: 12.220957
Longitude: -5.189662
Bottom Right
Latitude: 12.13132
Longitude: -5.143373

Mali - Nanposela

Centroid
Latitude: 12.329
Longitude: -5.3225

Site Extent
Top left
Latitude: 12.392
Longitude: -5.3225
Bottom Right
Latitude: 12.266
Longitude: -5.258


Optical Sensors

JECAM | Joint Experiment for Crop Assessment and Monitoring | Group on Earth Observation

©2013 Joint Experiment for Crop Assessment and Monitoring © HER MAJESTY THE QUEEN IN RIGHT OF CANADA SA MAJESTE LA REINE DU CHEF DU CANADA (2012)