Chipped branches [Spain]
- Creation:
- Update:
- Compiler: Artemi Cerda
- Editor: –
- Reviewer: Fabian Ottiger
Chipped branches
technologies_1269 - Spain
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Expand all Collapse all1. General information
1.2 Contact details of resource persons and institutions involved in the assessment and documentation of the Technology
SLM specialist:
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
Universidad de Valencia (Universidad de Valencia) - Spain1.3 Conditions regarding the use of data documented through WOCAT
When were the data compiled (in the field)?
23/03/2015
The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:
Yes
2. Description of the SLM Technology
2.1 Short description of the Technology
Definition of the Technology:
Chipped branch application on bare soil in order to prevent soil erosion, reduces overland flow, and increase the soil organic matter.
2.2 Detailed description of the Technology
Description:
In a Persimmon crop area from Valencia (south-east Spain), the research team of the University of Valencia set up an experiment in order to test the effect of chipped branches lying on soil surface to avoid soil water erosion and improve soil properties.
Purpose of the Technology: The increase in ground cover will decrease soil erosion by reducing raindrop impact over the bare soil. Runoff amount also decrease by increasing water surface storage, decrease of runoff velocity, and increase infiltration. Its application must to be done after the pruning season and before Mediterranean high-storm events; namely end summer to early autumn, in order to protect raindrop impact and detached by bare
Establishment / maintenance activities and inputs: Chipped branches will be obtained after pruning and harvesting.
Natural / human environment: The persimmon production in the area has been implemented in recent dates due to the market prices. There has been a quick land use change from citrus orchards to persimmon orchards.
The landscape reflects the long history of management where several constructions related with wine production depicted its importance on this region. Since the late 1960´s, chemical agriculture with use of fertilizers and herbicides, and new orchards plantations as Persimmon, lead to a seasonally bare soil surface, triggering huge erosion rates.
2.3 Photos of the Technology
2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment
Country:
Spain
Region/ State/ Province:
Spain
Further specification of location:
Valencia
Map
×3. Classification of the SLM Technology
3.1 Main purpose(s) of the Technology
- reduce, prevent, restore land degradation
3.2 Current land use type(s) where the Technology is applied
Cropland
- Tree and shrub cropping
Comments:
Major land use problems (compiler’s opinion): Increased runoff and soil erosion, resulting in a decrease of on-site fertility, water reservoir, and weakness of hydrological soil properties.
Major land use problems (land users’ perception): Loss of soil water resources and productivity.
3.3 Further information about land use
Comments:
Water supply: mixed rainfed - irrigated, mixed rainfed - irrigated
Specify:
Longest growing period in days: 180Longest growing period from month to month: February to July
3.4 SLM group to which the Technology belongs
- improved ground/ vegetation cover
3.6 SLM measures comprising the Technology
agronomic measures
- A1: Vegetation/ soil cover
- A2: Organic matter/ soil fertility
vegetative measures
- V1: Tree and shrub cover
management measures
- M2: Change of management/ intensity level
Comments:
Main measures: agronomic measures, management measures
3.7 Main types of land degradation addressed by the Technology
soil erosion by water
- Wt: loss of topsoil/ surface erosion
Comments:
Main causes of degradation: soil management, Heavy / extreme rainfall (intensity/amounts)
Secondary causes of degradation: crop management (annual, perennial, tree/shrub), deforestation / removal of natural vegetation (incl. forest fires), over-exploitation of vegetation for domestic use, overgrazing, industrial activities and mining, urbanisation and infrastructure development, discharges (point contamination of water), release of airborne pollutants (urban/industry…), disturbance of water cycle (infiltration / runoff), over abstraction / excessive withdrawal of water (for irrigation, industry, etc.), other human induced causes (specify), change in temperature, change of seasonal rainfall, wind storms / dust storms, floods, droughts, population pressure, land tenure, poverty / wealth, labour availability, inputs and infrastructure: (roads, markets, distribution of water points, other, …), education, access to knowledge and support services, war and conflicts, governance / institutional
3.8 Prevention, reduction, or restoration of land degradation
Specify the goal of the Technology with regard to land degradation:
- prevent land degradation
Comments:
Main goals: prevention of land degradation
Secondary goals: mitigation / reduction of land degradation, rehabilitation / reclamation of denuded land
4. Technical specifications, implementation activities, inputs, and costs
4.1 Technical drawing of the Technology
4.2 Technical specifications/ explanations of technical drawing
Chipped branches must be spread homogeneously in bare soil areas between trees lines in order to keep as much as possible the soil covered.
Location: Valencia. Spain
Date: 09/03/2015
Main technical functions: control of raindrop splash, control of dispersed runoff: retain / trap, improvement of ground cover, increase of surface roughness, increase in organic matter, sediment retention / trapping, sediment harvesting
Secondary technical functions: control of dispersed runoff: impede / retard, control of concentrated runoff: retain / trap, control of concentrated runoff: impede / retard, control of concentrated runoff: drain / divert, reduction of slope angle, reduction of slope length, improvement of surface structure (crusting, sealing), improvement of topsoil structure (compaction), improvement of subsoil structure (hardpan), stabilisation of soil (eg by tree roots against land slides), increase in nutrient availability (supply, recycling,…), increase of infiltration, increase / maintain water stored in soil, increase of groundwater level / recharge of groundwater, water harvesting / increase water supply, water spreading, improvement of water quality, buffering / filtering water, reduction in wind speed, increase of biomass (quantity), promotion of vegetation species and varieties (quality, eg palatable fodder), control of fires, reduction of dry material (fuel for wildfires), spatial arrangement and diversification of land use
Change of land use practices / intensity level: New practices must be implemented through the application on the chipped branches on bare soil areas.
5. Natural and human environment
5.1 Climate
Annual rainfall
- < 250 mm
- 251-500 mm
- 501-750 mm
- 751-1,000 mm
- 1,001-1,500 mm
- 1,501-2,000 mm
- 2,001-3,000 mm
- 3,001-4,000 mm
- > 4,000 mm
Specifications/ comments on rainfall:
Mediterranean climate with concentred precipitation in february-may and september-december months. Drought from june to september
Agro-climatic zone
- sub-humid
- semi-arid
Thermal climate class: temperate (Transition zone between semiarid and subhumid)
5.2 Topography
Slopes on average:
- flat (0-2%)
- gentle (3-5%)
- moderate (6-10%)
- rolling (11-15%)
- hilly (16-30%)
- steep (31-60%)
- very steep (>60%)
Landforms:
- plateau/plains
- ridges
- mountain slopes
- hill slopes
- footslopes
- valley floors
Altitudinal zone:
- 0-100 m a.s.l.
- 101-500 m a.s.l.
- 501-1,000 m a.s.l.
- 1,001-1,500 m a.s.l.
- 1,501-2,000 m a.s.l.
- 2,001-2,500 m a.s.l.
- 2,501-3,000 m a.s.l.
- 3,001-4,000 m a.s.l.
- > 4,000 m a.s.l.
Comments and further specifications on topography:
Altitudinal zone: 101-500m a.s.l. (300 meters above sea level)
5.3 Soils
Soil depth on average:
- very shallow (0-20 cm)
- shallow (21-50 cm)
- moderately deep (51-80 cm)
- deep (81-120 cm)
- very deep (> 120 cm)
Soil texture (topsoil):
- medium (loamy, silty)
Topsoil organic matter:
- medium (1-3%)
If available, attach full soil description or specify the available information, e.g. soil type, soil PH/ acidity, Cation Exchange Capacity, nitrogen, salinity etc.
Soil fertility is medium
Soil drainage/infiltration is medium
Soil water storage capacity is medium
5.4 Water availability and quality
Ground water table:
5-50 m
Availability of surface water:
poor/ none
Water quality (untreated):
for agricultural use only (irrigation)
5.5 Biodiversity
Species diversity:
- medium
5.6 Characteristics of land users applying the Technology
Relative level of wealth:
- average
5.7 Average area of land owned or leased by land users applying the Technology
- < 0.5 ha
- 0.5-1 ha
- 1-2 ha
- 2-5 ha
- 5-15 ha
- 15-50 ha
- 50-100 ha
- 100-500 ha
- 500-1,000 ha
- 1,000-10,000 ha
- > 10,000 ha
Comments:
Average area of land owned or leased by land users applying the Technology: < 0.5 ha (ranked 1), 0.5-1 ha, 1-2 ha (both ranked 2), 2-5 ha, 5-15 ha, 15-50 ha, 50-100 ha, 100-500 ha, 500-1,000 ha, 1,000-10,000 ha, > 10,000 ha (all ranked 3)
5.9 Access to services and infrastructure
health:
- poor
- moderate
- good
education:
- poor
- moderate
- good
technical assistance:
- poor
- moderate
- good
employment (e.g. off-farm):
- poor
- moderate
- good
markets:
- poor
- moderate
- good
energy:
- poor
- moderate
- good
roads and transport:
- poor
- moderate
- good
drinking water and sanitation:
- poor
- moderate
- good
financial services:
- poor
- moderate
- good
6. Impacts and concluding statements
6.1 On-site impacts the Technology has shown
Socio-cultural impacts
SLM/ land degradation knowledge
Ecological impacts
Water cycle/ runoff
surface runoff
Soil
soil moisture
soil cover
soil loss
soil crusting/ sealing
soil compaction
soil organic matter/ below ground C
6.2 Off-site impacts the Technology has shown
downstream flooding
downstream siltation
wind transported sediments
6.3 Exposure and sensitivity of the Technology to gradual climate change and climate-related extremes/ disasters (as perceived by land users)
Gradual climate change
Gradual climate change
Season | Type of climatic change/ extreme | How does the Technology cope with it? | |
---|---|---|---|
annual temperature | increase | not known |
Climate-related extremes (disasters)
Meteorological disasters
How does the Technology cope with it? | |
---|---|
local rainstorm | well |
local windstorm | not known |
Climatological disasters
How does the Technology cope with it? | |
---|---|
drought | not well |
Hydrological disasters
How does the Technology cope with it? | |
---|---|
general (river) flood | not known |
Other climate-related consequences
Other climate-related consequences
How does the Technology cope with it? | |
---|---|
reduced growing period | not known |
6.7 Strengths/ advantages/ opportunities of the Technology
Strengths/ advantages/ opportunities in the land user’s view |
---|
Use of the chipped branches as a treatment to cover soil and decrease erosion. It also keep higher soil moisture levels. |
Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view |
---|
It is a technology very easy to apply, with low failure possibilities and a strong soil erosion control and local soil properties improvement. |
It will prevent sediment movement and accumulation over roads and down slope properties and values at risk. |
6.8 Weaknesses/ disadvantages/ risks of the Technology and ways of overcoming them
Weaknesses/ disadvantages/ risks in the land user’s view | How can they be overcome? |
---|---|
The use of specific machinery to produce chipped branches. |
Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view | How can they be overcome? |
---|---|
A low application rate must be enough to decrease erosion. | Testing different application rates to decrease soil-water erosion. |
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