1.3 Condiciones referidas al uso de datos documentados mediante WOCAT

El compilador y la/s persona(s) de referencia claves aceptan las condiciones acerca del uso de los datos documentados mediante WOCAT:

Sí

2.1 Breve descripción de la Tecnología

Definición de la Tecnología:

Cultivation of tree belts across the direction of wind at appropriate intervals in the deposition zone, with a view to arrest wind erosion and facilitate stabilisation of dunes through interbelt development.

2.2 Descripción detallada de la Tecnología

Descripción:

The technology comprises establishment of 5 row shelterbelts at 160 m intervals. 3 row intermediary shelterbelts are introduced in between existing shelterbelts at 80 m interval. Land owners are encouraged to cultivate tree crops in between the belts.

Purpose of the Technology: Shelterbelts are useful in reducing wind velocity, there by arresting shifting of sand dunes, deposition of sand on fields, habitation, wells, roads etc. Cultivation of area between tree belts is made possible leading to increase in productivity from these lands.

Establishment / maintenance activities and inputs: The shelterbelts comprise tree species of different heights planted in rows (5 and 3 row deep) in a straight line across the wind direction. Six month old seedlings are planted in pits of volume 1 cuft to 1.5 cuft, which are filled with tank silt. One borewell is provided for one km length for life saving irrigation.

Natural / human environment: The environment is arid and forms the deposition zone wherein sand lifted from the impact zone is deposited. Sand dunes cover the area.

2.3 Fotografías de la Tecnología

2.5 País/ región/ lugares donde la Tecnología fue aplicada y que se hallan comprendidos por esta evaluación

País:

India

Región/ Estado/ Provincia:

Tirunelveli district, Tamil nadu state

Comentarios:

Total area covered by the SLM Technology is 100 km2.

The technology was implemented in the sand dune belt locally known as 'theri', located between the western mountain range and east coast of south India. The technology was initially implemented by the Government of Tamil nadu state in 1978 till 1985. The Danida supported project implemented by the department of Agricultural Engineering began activities to strengthen existing shelter belts, introduce inter belts and mass plantation from 1991 till 1999. The technology was initially implemented in an area much wider than the their lands, but experience showed that the shelterbelts was not the best methodology for low wind agricultural areas, so a shift to agro forestry and mass planting occurred.

Map

×

2.6 Fecha de la implementación

Si no se conoce el año preciso, indique la fecha aproximada:

• hace menos de 10 años (recientemente)

2.7 Introducción de la Tecnología

Especifique cómo se introdujo la Tecnología:

• mediante proyectos/ intervenciones externas

Comentarios (tipo de proyecto, etc.):

The Department of Agriculture Engineering implemented shelterbelts since 1958 in neighbouring Madurai district. The technology was introduced to Tirunelveli district by the department in 1978 wherein 5 row shelterbelts were established.

3.1 Propósito(s) principal(es) de la Tecnología MST

• mejorar la producción
• conservar el ecosistema

3.2 Tipo(s) actuales de uso de la tierra donde se aplica la Tecnología

Mezcla de tipos de uso de tierras dentro de la misma unidad de tierras: :

Sí

Especifique el uso combinado de tierras (cultivos/ pastoreo/ árboles):

• Agro-silvopastoralismo

Tierras cultivadas

Número de temporadas de cultivo por año:

• 1

Especifique:

Longest growing period in days: 100 Longest growing period from month to month: Oct - Dec

Tierra de pastoreo

Bosques

• Plantación de árboles, reforestación

Productos y servicios:

• Protección contra desastres naturales

Comentarios:

Major land use problems (compiler’s opinion): Crops cannot be cultivated due to sand deposition. Grass cover cannot develop due to shifting of dunes. Hence the area is neglected and degrades further. Only hardy species (ef. Palymra) and coarse grasses survive. Predominant land use is open grazing.

Major land use problems (land users’ perception): Land cannot be cultivated economically due to arid conditions, shifting dunes and open grazing.

Type of cropping system and major crops comments: Cultivation is practiced only in years of good rainfall. Single crop of pulse (black gram ) is taken.

3.4 Provisión de agua

Provisión de agua para la tierra donde se aplica la Tecnología:

• de secano

Comentarios:

Water supply: Also mixed rainfed - irrigated (ranked 2)

3.5 Grupo MST al que pertenece la Tecnología

• rompevientos/ cinturones de protección

3.7 Principales tipos de degradación del suelo encarados con la Tecnología

erosión de suelos por viento

• Ed; deflación y deposición
• Eo; efectos de degradación fuera del sitio:

Comentarios:

Main type of degradation addressed: Eo: offsite degradation effects

Secondary types of degradation addressed: Ed: deflation and deposition

4.1 Dibujo técnico de la Tecnología

Especificaciones técnicas (relacionadas al dibujo técnico):

Technical Drawing - Shelterbelt

Technical knowledge required for field staff / advisors: high

Technical knowledge required for land users: moderate

Main technical functions: reduction in wind speed

Secondary technical functions: improvement of ground cover, arresting movement of sand

Slope (which determines the spacing indicated above): 2.00%

Autor:

David Gandhi, India

4.2 Información general sobre el cálculo de insumos y costos

otra / moneda nacional (especifique):

Indian Rupee

Si fuera relevante, indique la tasa de cambio de dólares americanos a la moneda local (ej. 1 U$ = 79.9 Reales Brasileros): 1 U$ =:

48,85

4.3 Actividades de establecimiento

4.4 Costos e insumos necesarios para el establecimiento

Comentarios:

Duration of establishment phase: 60 month(s)

4.5 Actividades de establecimiento/ recurrentes

4.7 Factores más determinantes que afectan los costos:

Describa los factores más determinantes que afectan los costos:

The above costs cover an establishment period of 5 years for 1 hectare (250 plants) of shelterbelt; year 1: pitting, planting, watering. Year 2 & 3: periodic watering, watch and ward, prunng, gap filling. Year 4 & 5: watch and ward, pruning. Of the total number of 391 mandays/ha. of shelterbelt, 288 mandays go towards periodic watering over the first 3 years. Watering of plants is essential due to the semi-arid climate and sandy soil. In addition, as supportive technology for provision of water, one borewell with handpump was established per kilometer of shelterbelt.

5.1 Clima

5.2 Topografía

Comentarios y especificaciones adicionales sobre topografía :

Landforms: Plateau/plains (undulating terrain)
Slopes on average: Gentle (undulating)

5.3 Suelos

Si se halla disponible, adjunte una descripción completa de los suelos o especifique la información disponible, por ej., tipo de suelo, pH/ acidez de suelo, capacidad de intercambio catiónico, nitrógeno, salinidad, etc. :

Soil depth on average: Very deep (due to deposition by wind)
Soil texture: Coarse/light (sandy soil),
Soil fertility: Very low (low organic matter)
Topsoil organic matter: Low (low vegetative cover)
Soil drainage/infiltration: Good (permeability is high)
Soil water storage capacity: Very low (sandy soil, low organic matter)

5.6 Las características de los usuarios de la tierra que aplican la Tecnología

Indique otras características relevantes de los usuarios de las tierras:

Population density: 50-100 persons/km2
Annual population growth: 1% - 2%
38% of the land users are average wealthy (traders, labor).
42% of the land users are poor (small farmers, without water source).
20% of the land users are poor (small farmers, without water source).
Off-farm income specification: traders, employed in cashew processing plants, small industries, nearby towns, migration.
Level of mechanization: Manual work (in addition bullocks are used for ploughing)

5.8 Tenencia de tierra, uso de tierra y derechos de uso de agua

Tenencia de tierra:

• individual, con título

Derechos de uso de tierra:

• acceso abierto (no organizado)

6.4 Análisis costo-beneficio

¿Cómo se comparan los beneficios con los costos de establecimiento (desde la perspectiva de los usuarios de tierra)?

¿Cómo se comparan los beneficios con los costos de mantenimiento/ recurrentes (desde la perspectiva de los usuarios de tierra)?

6.5 Adopción de la Tecnología

De todos quienes adoptaron la Tecnología, ¿cuántos lo hicieron espontáneamente, por ej. sin recibir nada de incentivos/ materiales:

• 0-10%

Comentarios:

100% of land user families have adopted the Technology with external material support

5000 land user families have adopted the Technology with external material support

Comments on acceptance with external material support: estimates

There is a little trend towards spontaneous adoption of the Technology

Comments on adoption trend: Farmers are in favour of raising orchards to combat wind erosion and increase production in place of shelterbelts..

7.1 Métodos/ fuentes de información

7.2 Vínculos a las publicaciones disponibles

Título, autor, año, ISBN:

Review Reports

¿Dónde se halla disponible? ¿Costo?

Chief Engineer, Agriculture Engineering Department, Anna Salai-439, Nandanam, Chennai-600035

Título, autor, año, ISBN:

Project Implementation Plans, Project documents

¿Dónde se halla disponible? ¿Costo?

Programme Coordinator, WDCU, 11/1 Sarvapriya Vihar, New Delhi-110016.