Technologies

Reforestation of degraded agricultural land. [Spain]

Programa de reforestación de tierras agrarias degradadas

technologies_7125 - Spain

Completeness: 86%

1. General information

1.2 Contact details of resource persons and institutions involved in the assessment and documentation of the Technology

Key resource person(s)

SLM specialist:
Name of project which facilitated the documentation/ evaluation of the Technology (if relevant)
Land Use Based Mitigation for Resilient Climate Pathways (LANDMARC)
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
AMBIENTA Ingeniería y Servicios Agrarios y Forestales S.L. (AMBIENTA) - Spain

1.3 Conditions regarding the use of data documented through WOCAT

The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:

Ja

1.4 Declaration on sustainability of the described Technology

Is the Technology described here problematic with regard to land degradation, so that it cannot be declared a sustainable land management technology?

Nee

2. Description of the SLM Technology

2.1 Short description of the Technology

Definition of the Technology:

Degraded or abandoned agricultural land is under restoration in an area with a mediterranean climate, and a high risk of desertification. Plantations are based on indigenous forest species, mainly holm oak and cork oak, to ensure a sustainable mature forest in the future.

2.2 Detailed description of the Technology

Description:

In Spanish, the "Program for Reforestation of Degraded Agricultural Lands" refers to the concept of "reforestación," which is typically translated into English as "afforestation." This can sometimes lead to translation issues. To ensure the term remains as close as possible to the original program's intent, the English term "reforestation" has been chosen.
Degraded or abandoned agricultural land is under restoration in rural areas in the West and South of the Iberian Peninsula. Here, there is a high risk and incidence of desertification. Reforestation – meaning restoring the original trees of the area - is a nature-based solution that contributes to the rehabilitation of degraded areas. The main objective is to reclaim land, mainly in rural environments, and to give it a second life capable of providing ecosystem and forest services.
Reforestation contributes to soil recovery, the increase of biodiversity associated with forest ecosystems, carbon sequestration and storage, the improvement of the landscape and the regulation of the hydrological cycle. Furthermore, in the arid areas of the West and South of the Iberian Peninsula, it provides a brake on the advance of desertification.
In order to carry out the reforestation, a technical reforestation project must be planned that includes species adapted to the environment which can accelerate the process of transforming the reforested area from a degraded area to a climax forest. Thus, plantations are based on indigenous forest species, mainly holm oak (Quercus ilex) and cork oak (Quercus suber), to ensure a sustainable mature forest in the future. The forest species, the planting framework, the soil preparation work, the design of the plantation, the planting season, the forest nursery from which the plants will be brought, and whether or not irrigation is required for planting are selected. It is necessary to design the maintenance work during the years after planting to ensure the long-term success of the reforestation.
It is important to have an adequate long-term reforestation plan that includes proper planting and maintenance in the subsequent years. This requires a sufficient budget to cope with the work, which includes forestry personnel and specialised machinery. In addition, the forest reproductive material used must come from nurseries where the origin of the plants is known and certified.
The advantages for land managers are many, mainly related to landscape and ecosystem restoration and erosion control. It can also provide landowners with added value in terms of an income based on livestock or forestry management, or in terms of carbon credits. As for the more negative aspects, it is a technology that requires economic investment and perseverance over the years, as it cannot be implemented quickly. Thus, most of the objectives are only fully achieved after several decades of effort and dedication.

2.3 Photos of the Technology

2.4 Videos of the Technology

Comments, short description:

Webinar on management of afforestation on agricultural land - 20 May 2021 (Spanish language)
Webinar sobre gestión de forestaciones en tierras agrarias - 20 mayo 2021
https://www.youtube.com/watch?v=A5C108RhDjM&t=1241s

Webinar organised by the Cork, Wood and Charcoal Institute (ICMC), a centre attached to CICYTEX, to address the management of forestation on agricultural land after the commitment period set by the Common Agricultural Policy (CAP).

The conference was structured as follows:
- Programme of afforestation of agricultural land and the general state of the stands.
- Management of the risks that landowners may encounter, such as scrub encroachment, fire, erosion, climate change and health problems.
- Improvement of the productivity of these lands through actions on the tree and herbaceous stratum.
- Administrative aspects

Webinar organizado por el Instituto del Corcho, la Madera y el Carbón Vegetal (ICMC), centro adscrito a CICYTEX, para abordar la gestión de forestaciones en tierras agrarias tras el periodo de compromiso marcado por las ayudas de la Política Agraria Común (PAC).

La jornada se estructuró como sigue:
- Programa de Forestación de Tierras Agrarias y estado general de las masas
- Gestión de los riesgos que pueden encontrar los propietarios, tales como la invasión de matorral, los incendios, la erosión, el cambio climático o los problemas sanitarios
- Mejora de la productividad de estos terrenos mediante actuaciones sobre el arbolado y el estrato herbáceo
- Aspectos administrativos

Date:

21/05/2021

Location:

Extremadura (Spain)

Name of videographer:

PRODEHESA MONTADO POCTEP. CICYTEX - Instituto del Corcho, la Madera y el Carbón Vegetal (ICMC), Extremadura (Spain)

2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment

Country:

Spain

Region/ State/ Province:

Extremadura

Further specification of location:

Cabeza del Buey and Llera (Badajoz, Spain)

Specify the spread of the Technology:
  • evenly spread over an area
If precise area is not known, indicate approximate area covered:
  • 1-10 km2
Is/are the technology site(s) located in a permanently protected area?

Nee

2.6 Date of implementation

Indicate year of implementation:

1996

If precise year is not known, indicate approximate date:
  • 10-50 years ago

2.7 Introduction of the Technology

Specify how the Technology was introduced:
  • through projects/ external interventions
  • European subsidies
Comments (type of project, etc.):

Reforestation programme for degraded agricultural land. EAFRD funds.

3. Classification of the SLM Technology

3.1 Main purpose(s) of the Technology

  • reduce, prevent, restore land degradation
  • conserve ecosystem
  • preserve/ improve biodiversity
  • adapt to climate change/ extremes and its impacts
  • mitigate climate change and its impacts

3.2 Current land use type(s) where the Technology is applied

Land use mixed within the same land unit:

Ja

Specify mixed land use (crops/ grazing/ trees):
  • Agro-silvopastoralism

Forest/ woodlands

Forest/ woodlands

  • Tree plantation, afforestation
Tree plantation, afforestation: Specify origin and composition of species:
  • Mixed varieties
  • Mediterranean arid forests
  • Quercus ilex and Quercus suber
Are the trees specified above deciduous or evergreen?
  • evergreen
Products and services:
  • Fuelwood
  • Fruits and nuts
  • Nature conservation/ protection
Comments:

Reforestation programme for degraded agricultural land. EAFRD funds. Planting with climactic species following criteria of forest restoration with native climactic species.

3.3 Has land use changed due to the implementation of the Technology?

Has land use changed due to the implementation of the Technology?
  • Yes (Please fill out the questions below with regard to the land use before implementation of the Technology)
Land use mixed within the same land unit:

Ja

Specify mixed land use (crops/ grazing/ trees):
  • Agro-silvopastoralism
Cropland

Cropland

  • Annual cropping
Annual cropping - Specify crops:
  • cereals - wheat (spring)
Is intercropping practiced?

Nee

Is crop rotation practiced?

Nee

Comments:

The agricultural land had been abandoned

3.4 Water supply

Water supply for the land on which the Technology is applied:
  • rainfed
Comments:

They used to be rainfed agricultural lands and now reforestation only uses natural rainfall.

3.5 SLM group to which the Technology belongs

  • natural and semi-natural forest management
  • forest plantation management
  • agroforestry

3.6 SLM measures comprising the Technology

vegetative measures

vegetative measures

  • V1: Tree and shrub cover
  • V3: Clearing of vegetation
management measures

management measures

  • M1: Change of land use type

3.7 Main types of land degradation addressed by the Technology

soil erosion by water

soil erosion by water

  • Wt: loss of topsoil/ surface erosion
biological degradation

biological degradation

  • Bc: reduction of vegetation cover
  • Bh: loss of habitats
  • Bq: quantity/ biomass decline
  • Bs: quality and species composition/ diversity decline
  • Bl: loss of soil life
water degradation

water degradation

  • Ha: aridification

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:
  • reduce land degradation
  • restore/ rehabilitate severely degraded land
Comments:

Reforestation programme for degraded agricultural land. Planting with climactic species following criteria of forest restoration with native climactic species.

4. Technical specifications, implementation activities, inputs, and costs

4.1 Technical drawing of the Technology

Technical specifications (related to technical drawing):

Soil preparation for planting.
Manual planting.
Tree planting. (Quercus ilex and Quercus suber)

Author:

José Ángel Rivas

Date:

22/11/2016

Technical specifications (related to technical drawing):

Soil preparation for planting.
Manual and mechanised.
Tree planting.

Author:

Francisco Dorado, Álvaro garcía, Eugenio Caja del Castillo, Francisco Izquierdo, José Ignacio Rodríguez

Technical specifications (related to technical drawing):

Soil preparation for planting.
Manual planting.
Tree planting. (Quercus ilex and Quercus suber)

Author:

José Ángel Rivas

Date:

22/11/2016

4.2 General information regarding the calculation of inputs and costs

Specify how costs and inputs were calculated:
  • per Technology area
Indicate size and area unit:

10-50 has

If using a local area unit, indicate conversion factor to one hectare (e.g. 1 ha = 2.47 acres): 1 ha =:

3000 €/ha (reforestation) + 1000 €/ha (maintenance every 2 years)

other/ national currency (specify):

EUR

Indicate average wage cost of hired labour per day:

500 €/day

4.3 Establishment activities

Activity Timing (season)
1. Soil preparation for planting Autumn-Winter
2. Plants and seeds travel from nursery to farm Winter
3. Planting trees Winter
4. Protection for plants Winter
5. First irrigation for support plants Spring- Summer
6. Maintenance planting Winter year 2-4-6-8-10

4.4 Costs and inputs needed for establishment

If you are unable to break down the costs in the table above, give an estimation of the total costs of establishing the Technology:

2999.0

If land user bore less than 100% of costs, indicate who covered the remaining costs:

Subsidies from the Extremadura Regional Government, Spanish Government and EU (FEADER)

4.6 Costs and inputs needed for maintenance/ recurrent activities (per year)

If you are unable to break down the costs in the table above, give an estimation of the total costs of maintaining the Technology:

3000.0

If land user bore less than 100% of costs, indicate who covered the remaining costs:

Subsidies from the Extremadura Regional Government, Spanish Government and EU (FEADER)

Comments:

3000 €/ha (reforestation) + 1000 €/ha (maintenance every 2 years)

4.7 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

Working personnel and plant protection

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
Specify average annual rainfall (if known), in mm:

650.00

Specifications/ comments on rainfall:

The Mediterranean climate is characterised by four months in summer with high temperatures and summer drought.

Indicate the name of the reference meteorological station considered:

Castuera (Badajoz, Spain)

Agro-climatic zone
  • semi-arid

The Mediterranean climate is a type of climate characterised by hot, dry summers and cold, rainy winters.

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.
Indicate if the Technology is specifically applied in:
  • not relevant
Comments and further specifications on topography:

Reforestation of degraded agricultural land can be carried out on flat, undulating land or on slopes with a gradient of up to 30%, with appropriate soil management and preparation measures. For slopes steeper than 30%, terracing is used, but this is not the case for this SLM.

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)
Soil texture (> 20 cm below surface):
  • medium (loamy, silty)
Topsoil organic matter:
  • low (<1%)
If available, attach full soil description or specify the available information, e.g. soil type, soil PH/ acidity, Cation Exchange Capacity, nitrogen, salinity etc.

pH (Extracto suelo/agua 1/2,5) 5,93 5,5 - 8,6 - PNT-Suelos-01
Conductividad (Extracto 1/5) (μS/cm) 22,5 200 - PNT-Suelos-02
Fósforo (ppm P) 21,11 11 20 - 30 - PNT-Suelos-03
Calcio (meq Ca / 100 g. suelo) 4,99 3,5 10 - 14 - PNT-Suelos-04
Magnesio (meq Mg / 100 g. suelo) 0,84 0,60 1,60 - 2,50 - PNT-Suelos-04
Potasio (meq K / 100 g. suelo) 0,57 0,61 - 0,90 - PNT-Suelos-04
Materia Orgánica Total (%) 0,94 0,9 2,0 - 2,5 - PNT-Suelos-05
Cobre (ppm Cu) 0,2 0,20 0,20 - PNT-Suelos-06
Hierro ( ppm Fe) 6,24 3,00 5,00 - PNT-Suelos-06
Manganeso ( ppm Mn) 2,16 1,00 1,50 - PNT-Suelos-06
Zinc (ppm Zn) 0,58 0,50 1,00 - PNT-Suelos-06
Boro ( ppm B) 0,58 0,50 1,00 - 5,00 5,00 -PNT-Suelos-07
Nitrógeno total (%) 0,14 0,11-0,20 - PNT-Suelos-12
Relación C/N 3,79 < 6,0 6,0-10,0 - PNT-Suelos-30
Sodio (meq Na / 100 g. suelos) 0,14 0,30 0,60 - 1,00 1,50 - PNT-Suelos-04
Textura Francoarenoso - PNT-Suelos-11
Arena (%) 53,52 - PNT-Suelos-11
Arcilla (%) 13,76 - PNT-Suelos-11
Limo (%) 32,72 - PNT-Suelos-11
Carbono Orgánico Oxidable (%) 0,42 - PNT-Suelos-05

5.4 Water availability and quality

Ground water table:

> 50 m

Availability of surface water:

poor/ none

Water quality (untreated):

good drinking water

Water quality refers to:

surface water

Is water salinity a problem?

Nee

Is flooding of the area occurring?

Nee

Comments and further specifications on water quality and quantity:

The area studied is an agricultural area in a forest environment with problems of drought and advancing desertification.

5.5 Biodiversity

Species diversity:
  • high
Habitat diversity:
  • high
Comments and further specifications on biodiversity:

The surrounding climax forests represent high levels of biodiversity of both fauna and flora. The reforested area after thirty years of management has increased plant biodiversity and has changed from a degraded agricultural area to a Mediterranean forest in the process of consolidation.

5.6 Characteristics of land users applying the Technology

Sedentary or nomadic:
  • Sedentary
Market orientation of production system:
  • mixed (subsistence/ commercial)
Off-farm income:
  • 10-50% of all income
Relative level of wealth:
  • average
Individuals or groups:
  • individual/ household
Level of mechanization:
  • mechanized/ motorized
Gender:
  • men
Age of land users:
  • elderly
Indicate other relevant characteristics of the land users:

Generational replacement is a problem in the rural areas of Extremadura, which live from agricultural, livestock and forestry systems.

5.7 Average area of land used 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
Is this considered small-, medium- or large-scale (referring to local context)?
  • medium-scale
  • large-scale

5.8 Land ownership, land use rights, and water use rights

Land ownership:
  • individual, titled
Land use rights:
  • individual
Water use rights:
  • individual
Are land use rights based on a traditional legal system?

Ja

Specify:

Land owned and inherited from parents to children.

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-economic impacts

Production

forest/ woodland quality

decreased
increased
Quantity before SLM:

Agricultural degraded area

Quantity after SLM:

Climatic Mediterranean Forest growing

land management

hindered
simplified
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Socio-cultural impacts

SLM/ land degradation knowledge

reduced
improved
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

Learning about reforestation maintenance over three decades

Ecological impacts

Soil

soil cover

reduced
improved
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

Soil samples taken show an increase in organic matter and C fixed in the soil.

soil organic matter/ below ground C

decreased
increased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

Soil samples taken show an increase in organic matter and C fixed in the soil.

Biodiversity: vegetation, animals

biomass/ above ground C

decreased
increased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

No trees existed prior to planting.

plant diversity

decreased
increased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

Quercus ilex, Quercus suber, and more than 15 Mediterranean species monitored

habitat diversity

decreased
increased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

A new Mediterranean ecosystem growing towards a forest of climatic quality capable of supporting fauna and flora.

Climate and disaster risk reduction

drought impacts

increased
decreased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

The reforested area represents a brake on the advance of desertification in the area.

emission of carbon and greenhouse gases

increased
decreased
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

Although the soils in the area are poor and difficult to store carbon, the first sampling data give positive values for the soil. In terms of forest biomass the increase is total over a baseline of zero.

6.2 Off-site impacts the Technology has shown

groundwater/ river pollution

increased
reduced

buffering/ filtering capacity

reduced
improved

impact of greenhouse gases

increased
reduced
Quantity before SLM:

Agricultural degraded and abandoned area

Quantity after SLM:

Climatic Mediterranean Forest growing

Comments/ specify:

It is considered a land mitigation technology because of its ability to sequester and store carbon in soil and biomass.

Specify assessment of off-site impacts (measurements):

Estimated

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 increase or decrease How does the Technology cope with it?
other gradual climate change Microclimate high temperature decrease moderately

Climate-related extremes (disasters)

Other climate-related extremes (disasters)
other (specify) How does the Technology cope with it?
Fight against desertification very well

6.4 Cost-benefit analysis

How do the benefits compare with the establishment costs (from land users’ perspective)?
Short-term returns:

slightly negative

Long-term returns:

very positive

How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?
Short-term returns:

slightly negative

Long-term returns:

positive

Comments:

If the subsidy programme for the afforestation of agricultural land is taken into account, the costs borne by the landowner are greatly reduced and the long-term benefits are increased.

6.5 Adoption of the Technology

  • 1-10%
Of all those who have adopted the Technology, how many did so spontaneously, i.e. without receiving any material incentives/ payments?
  • 0-10%
Comments:

Without the reforestation programme for agricultural land and subsidies, the technology is very costly for landowners.

6.6 Adaptation

Has the Technology been modified recently to adapt to changing conditions?

Ja

If yes, indicate to which changing conditions it was adapted:
  • climatic change/ extremes
Specify adaptation of the Technology (design, material/ species, etc.):

Drought forces the design of plantations with greater technical restrictions for species adaptation and greater water retention capacity.

7. References and links

7.1 Methods/ sources of information

  • field visits, field surveys

Landmarc Project. Case Study 13.
10 people (8 Ambienta + 2 ETHZ)

  • interviews with land users

Landowners (2)

  • compilation from reports and other existing documentation

Understanding soil and tree biomass carbon sequestration potential in oaks-afforested Dehesas.
Object: Master's thesis, Master's degree programme in Environmental Sciences

Author: Valeria Renna, rennaa@student.ethz.ch, student of MSc in Environmental Sciences, ETH, Student ID number: 16-929-101

Supervision:
•Dr. Moritz Laub, moritz.laub@usys.ethz.ch, Sustainable agroecosystem group, ETH
•Prof. Dr. Johan Six, johan.six@usys.ethz.ch, Sustainable agroecosystem group, ETH

In collaboration with:
Private Spanish company “Ambienta”. Ambienta agricultural and forestry engineering and services SL was founded in 2006. Located both in Cáceres and Sevilla, it has several years of experience with all kinds of activities in the rural and natural environment as well as in the agriculture and forestry sectors.
•Federico Julián, fjulian.ambienta@gmail.com, Ambienta
•Pilar Martín Gallego, pilar.ambienta@gmail.com, Ambienta

When were the data compiled (in the field)?

18/05/2022

Comments:

H2020. Landmarc Project. Case Study 13.
Ambienta and ETHZ

7.2 References to available publications

Title, author, year, ISBN:

Initial soil carbon losses may offset decades of biomass carbon accumulation in Mediterranean afforestation. 2023. Valeria Renna, Pilar Martín-Gallego, Federico Julián, Johan Six , R´emi Cardinael, Moritz Laub

Available from where? Costs?

Geoderma Regional 36 (2024) e00768 Online - free

Title, author, year, ISBN:

Programa de forestación de tierras agrarias en Andalucía. Jiménez, Navarro, 2014.

Available from where? Costs?

Online - free

Title, author, year, ISBN:

Repoblación forestal. Forestación de tierras agrícolas. Castilla la Mancha. Francisco Dorado, Álvaro garcía, Eugenio Caja del Castillo, Francisco Izquierdo, José Ignacio Rodríguez

Available from where? Costs?

Online - free

Title, author, year, ISBN:

La forestación de tierras agrarias a través de los Programas de Desarrollo Rural en España: Una medida con impacto medioambiental positivo en el medio rural. Miguel Angel Fernández Carrillo. Belmonte Serrato F. Romero Díaz A. Francisco Robledano

Available from where? Costs?

Online - free

7.3 Links to relevant online information

Title/ description:

Initial soil carbon losses may offset decades of biomass carbon accumulation in Mediterranean afforestation.

URL:

https://www.sciencedirect.com/science/article/pii/S2352009424000154

Title/ description:

La forestación de tierras agrarias a través de los Programas de Desarrollo Rural en España: Una medida con impacto medioambiental positivo en el medio rural.

URL:

https://www.researchgate.net/publication/305474914_La_forestacion_de_tierras_agrarias_a_traves_de_los_Programas_de_Desarrollo_Rural_en_Espana_Una_medida_con_impacto_medioambiental_positivo_en_el_medio_rural/link/57fb7fb108ae8da3ce60fa81/download

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