Land Health Surveillance•Identify where land problems exist
•Quantify major risks to land health
•Target agroforestry interventions
•Evaluate the outcomes of interventions
Field Measurement
Designed to provide;
biophysical baselines at
landscape level
(vegetation, soil condition)
a monitoring and evaluation
framework
the Land Degradation
Surveillance Framework
Field Measurement
Sentinel Site Surveillance
Framework
a spatially stratified,
hierarchical, randomized
sampling framework
Sentinel site (100 km2)
16 Clusters (1 km2)
10 Plots (1000 m2)
4 Sub-Plots (100 m2)
LDSF sampling plot (1000 m2) with sub-plots (100 m2)
•Fast
•Repeatable
•Functional, interpretable
•Applicable everywhere
•Widely tested
•With local communities
Shrub biovolume by block & cluster
UNEP-ICRAF West Africa Drylands Project
Intervention Targeting
Priority afforestationintervention area (ha) based on woody cover ratings for each cluster (100 ha)Clusters in red have high priority due to high inherent degradation risk
UNEP-ICRAF West Africa Drylands Project
Allometrics
•Biovolume to biomass to C
• Trees, shrubs, Species
• Belowground woody biomass
• Tapering coefficients; fractal branching
•Infrared spectroscopy for wood moisture and density
Improved wood density databases
Protocols for local calibrations
N2O emissions in AF systems with N-fixing trees
ForestCleared
land Coffee
Sumatra
N2O
(Kg
-N h
a-1
y-1
)
Shade Coffee
Trace Gases
Small chambers will be used to measure
the fluxes of N2O, CO2
and CH4 to generate default factors for
N2O and to estimate the soil respiration flux under different
land uses
Trace Gas Measurements
Infrared Spectroscopy for rapid soil characterization
• Rapid
• Reproducible
• Low cost
• Predicts soil carbon
&functional soil
properties
Soils Measurement
Soil infrared spectroscopy labs
FT-NIR
Salien
Tanzania
Chitedze
Malawi
Sotuba
Mali
Maputo
Mozambique
ICRAF
reference and
support lab
Nairobi
Future
locations
FT-MIR
VNIR
Lo
cal
(sit
e-l
evel
) C
ref
Digital mapping of soil carbon
10 km
UNEP-ICRAF West Africa Drylands Project
Test site – Western Kenya
Western Kenya Integrated Ecosystem Management Project
Over the course of four years farmers, extension services, planners, the private sector, policymakers and scientists will have freely available, web-enabled access to a globally integrated, evidence-based, and dynamic soil health information service that provides management, planning and policy-relevant soil information for the non-desert portions of Sub-Saharan Africa.
A Globally Integrated African Soil Information Service
CIAT-TSBF, Earth Institute at Columbia University, World Agroforestry Centre, International Soil Reference Information Centre
With support to CIAT-TSBF from Bill & Melinda Gates Foundation and Alliance for a Green Revolution in Africa
AfricaSoils.net
Randomization of Sentinel Site locations stratified by climate
Digital mapping of C (covariates, scales)
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