Presented by : Lecturer: Lidija BerkeDr. Madelon Maurice Renske Bolder Liliana Joach í n
Soil and land health monitoring for targeting restoration in degraded farmlands Cases from Peru and...
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Transcript of Soil and land health monitoring for targeting restoration in degraded farmlands Cases from Peru and...
Soil and land health monitoring for targeting restoration in degraded farmlands
Cases from Peru and Uganda
Tor-Gunnar Vågen, Valentina Robiglio, Madelon Lohbeck,Clement Okia, Roeland Kindt, Erick Opiyo and Jonathan Cornelius
Restoration- more than planting trees
What to restore (baseline) towards what (target)?
target
Baseline
From:IUCN 2012, Parks Canada 2008
Why indicators for land degradation?
• Assess baseline• Identify priority areas for restoration• Inform appropriate restoration strategies• Monitor progress of restoration
MESSAGESLandscape restoration = multiple scaleDegradation/ resilience = baseline from which to design restoration strategies towardsachievable goals
Mosaic-landscape restoration framework
What makes a good indicator for land degradation?
• Reflects the complex processes of land degradation in landscapes
• Science-based• Measurable• Rapid• Based on field assessment across multiple
scales
Indicators for land degradation usedIndicator Process Method
1. Vegetation cover and tree diversity
Biomass, productivity, soil retention
Ground: tree density and diversity inventoriesAerial: satellite images using Soil Adjusted Total Vegetation Index (SATVI)
2. Erosion prevalence (probability)
Soil retention, soil nutrients, risk of landslides
Ground: systematic observationsAerial: satellite images using reflectance spectra
3. Root-depth restrictions (probability, at given depth)
Intensity of landuse (compaction), agricultural productivity, leads to erosion
Ground: Auger-depth measurements, Aerial: satellite images using reflectance spectra
4. Soil organic carbon Carbon sink, soil health, productive capacity
Ground: Soil analyses Aerial: satellite images using reflectance spectra
Uganda
Peru
2 Case studies
2 Case studies
Peru; Ucayali• Extensive cattle raising• Low population pressure• Flat topography, seasonally
flooded• 56% grassland, 17%
cropland, 16% thicket
Uganda; ‘Mbale’• Mosaic of smallholder
farming systems• High population pressure• Mountainous topography,
landslides• 90% cropland, 9% grassland
Indicator 1: Vegetation
Fewer trees (concentrated), high diversity
More trees (spread), high dominance
Indicator 2: Erosion
prevalence
Low erosion prevalence High erosion prevalence
Indicator 3: Root-depth restrictions
Little root-depth restrictions, Overall low water infiltration capacity
High root-depth restrictions, reducing water infiltration capacity
Indicator 4: Soil organic
carbon
Intermediate – high SOC Relatively low SOC
Target restoration strategies with indicators
Peru• Constraints:Low water infiltration and flat topography -> waterlogging
• OpportunitiesFallows- natural regeneration, include enrichment planting with spp that resist waterlogging and provide benefits to farmers (e.g. timber spp)Develop silvopastoral systems with rotational grazing
Uganda• Constraints:High population density, landslides & erosion
• OpportunitiesFurther stimulate agroforestry, enrich by planting native species that enhance soil health (e.g. Fleroya robustipulata, N-fixing species)
Educating farmers on native species through ‘tree finder app’
‘Africa Tree Finder App’
Restoration is a priority• Let’s not forget:– What are we restoring? (baseline)– What are we aiming towards? (targets)– Does our restoration-strategy work? (monitoring)
Good indicators and consistent methods are vital