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Technologies
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Vegetable Intercropping in Apple Orchards [Bhutan]

n/a

technologies_6844 - Bhutan

Completeness: 90%

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)

land user:

Sharman Rai

n/a

Bhutan

Name of project which facilitated the documentation/ evaluation of the Technology (if relevant)
Strengthening national-level institutional and professional capacities of country Parties towards enhanced UNCCD monitoring and reporting – GEF 7 EA Umbrella II (GEF 7 UNCCD Enabling Activities_Umbrella II)
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
National Soil Services Center, Department of Agric (National Soil Services Center, Department of Agric) - Bhutan

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:

Yes

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?

No

2. Description of the SLM Technology

2.1 Short description of the Technology

Definition of the Technology:

Vegetables are intercropped between fruit-bearing trees in orchards. This maximizes land utilization, increases agrobiodiversity, and optimizes agricultural productivity.

2.2 Detailed description of the Technology

Description:

Intercropping of vegetables with fruit-bearing trees in orchards can be an effective system in terms of production and agroecology. It is a sustainable farming technique that optimizes land use, increases agrobiodiversity, diversifies production, and enhances overall yields. Land users in Yusipang grow peas, beans, and cole crops (cabbages, kale, etc.) in their apple orchards.
Intercropping vegetables in orchard land optimizes the use of space, sunlight, water and nutrients. Intercropping also increases biodiversity within the orchard ecosystem. This coexistence of species reduces the vulnerability of the orchard to crop failure and pest infestation: it improves the residence of the overall system.
Trees in the system absorb nutrients from the soil and return them through fallen leaves, thereby improving soil fertility and reducing reliance on external fertilizers. This nutrient recycling improves the overall health of the orchard ecosystem. Intercropping can also help in natural pest management through various mechanisms – including the attraction of beneficial insects - thus reducing the need for chemical pesticides. It also fosters a beneficial microclimate.
To establish intercropping of vegetables in orchards, careful planning and design is required with respect to crop selection, spacing of trees and intercrops, irrigation, and nutrient management. Regular weeding and mulching are required alongside adequate irrigation, integrated pest management, and pruning of fruit trees to prevent competition for light and space.
Intercropping of vegetables in orchards thus offers multiple benefits to farmers and the overall agricultural system, including increased farm productivity. It increases climate resilience and improves the health of the agroecosystem. However, it is important to be aware of potential drawbacks. These include competition between crops for resources - and labour. Sound management practices can overcome these challenges and maximize the effectiveness of intercropping.

2.3 Photos of the Technology

2.4 Videos of the Technology

Location:

n/a

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

Country:

Bhutan

Region/ State/ Province:

Thimphu

Further specification of location:

Yusipang, Chang Gewog, Thimphu Dzongkhag

Specify the spread of the Technology:
  • evenly spread over an area
If the Technology is evenly spread over an area, specify area covered (in km2):

0.4

Is/are the technology site(s) located in a permanently protected area?

No

Comments:

The area does not fall under any protected area or parks.

2.6 Date of implementation

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:
  • as part of a traditional system (> 50 years)

3. Classification of the SLM Technology

3.1 Main purpose(s) of the Technology

  • reduce, prevent, restore land degradation
  • conserve ecosystem
  • preserve/ improve biodiversity
  • reduce risk of disasters
  • create beneficial economic impact

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

Land use mixed within the same land unit:

Yes

Specify mixed land use (crops/ grazing/ trees):
  • Agroforestry

Cropland

Cropland

  • Annual cropping
  • Tree and shrub cropping
Annual cropping - Specify crops:
  • vegetables - other
  • vegetables - root vegetables (carrots, onions, beet, other)
  • Cole crops, chili, beans, peas
Number of growing seasons per year:
  • 1
Is intercropping practiced?

Yes

If yes, specify which crops are intercropped:

Vegetables and fruit trees are intercropped.

Is crop rotation practiced?

Yes

If yes, specify:

Vegetables are rotated in the orchard.

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

Has land use changed due to the implementation of the Technology?
  • No (Continue with question 3.4)

3.4 Water supply

Water supply for the land on which the Technology is applied:
  • mixed rainfed-irrigated

3.5 SLM group to which the Technology belongs

  • agroforestry
  • rotational systems (crop rotation, fallows, shifting cultivation)
  • improved ground/ vegetation cover

3.6 SLM measures comprising the Technology

agronomic measures

agronomic measures

  • A1: Vegetation/ soil cover

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
  • Wg: gully erosion/ gullying
soil erosion by wind

soil erosion by wind

  • Et: loss of topsoil
physical soil deterioration

physical soil deterioration

  • Pc: compaction
  • Ps: subsidence of organic soils, settling of soil
biological degradation

biological degradation

  • Bc: reduction of vegetation cover

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:
  • prevent land degradation
  • reduce land degradation

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

4.1 Technical drawing of the Technology

Author:

Designed by Tshering Gyeltshen

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:

1 acre

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

1 acre

other/ national currency (specify):

BTN

If relevant, indicate exchange rate from USD to local currency (e.g. 1 USD = 79.9 Brazilian Real): 1 USD =:

81.0

Indicate average wage cost of hired labour per day:

Nu. 800

4.3 Establishment activities

Activity Timing (season)
1. Assess the orchard: Evaluate the orchard's existing conditions, including soil fertility, drainage, sunlight availability, and pest and disease history. This assessment will help determine the feasibility and suitability of intercropping vegetables in the orchard. Anytime
2. Select compatible vegetable crops: Choose vegetable crops that are compatible with the existing fruit trees in terms of their growth requirements, sunlight tolerance, water needs, and harvesting periods. Consider crops that are less competitive and can thrive in the orchard's microclimate. Year-round
3. Plan the intercropping layout: Develop a planting design that optimises space utilisation and resource distribution. Consider factors such as crop spacing, row orientation, and the arrangement of vegetable crops within the orchard. Ensure that the intercropped vegetables are positioned to minimise shading and competition with the fruit trees. Anytime
4. Prepare the soil: Prior to planting, prepare the soil by clearing any existing vegetation and weeds. Conduct soil testing to assess nutrient levels and pH, and amend the soil if necessary to create optimal growing conditions for both the vegetables and fruit trees. Spring
5. Implement irrigation systems: Install or adapt irrigation systems to accommodate the intercropped vegetables' water requirements. Consider the water needs of both the vegetables and fruit trees when determining irrigation frequency and duration. Anytime
6. Manage nutrients: Determine the nutrient requirements of the intercropped vegetables and fruit trees. Based on soil test results, develop a fertilization plan that addresses the nutritional needs of both crops. Apply organic or synthetic fertilizers as appropriate, considering the specific nutrient requirements of each crop. Anytime
7. Implement pest and disease management strategies: Develop an integrated pest management (IPM) plan to control pests and diseases effectively. Monitor the orchard regularly for signs of pests or diseases and take appropriate preventive or corrective actions, such as using natural predators, applying organic pesticides, or practising cultural methods like crop rotation. After plantation
8. Weed management: Employ weed control measures to minimise competition between the vegetables and fruit trees. This can include mulching the soil around plants, practising regular manual weeding, or using targeted herbicides that are safe for both crops. After plantation
9. Monitor and adjust: Continuously monitor the growth and performance of both the vegetables and fruit trees throughout the growing season. Make necessary adjustments to irrigation, fertilisation, pest control, and other management practices based on observations and the specific needs of each crop. Year-round

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:

23000.0

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

The land users bore 100% of costs.

Comments:

Taking into consideration the labour charge for layout making, pit digging, pit filling, use of equipment such as spades and crowbars, and plantation of fruit trees and then some seasonal vegetables in between the fruit trees in 1 ac of land, the approximate cost of establishment is Nu 23000 (USD 284).

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:

6000.0

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

The land users bore 100% of costs.

Comments:

Taking into consideration maintenance activities such as weeding, watering, manuring, pruning, and pest and disease management in 1 ac of land, the approximate cost of maintenance per year is Nu 6000 (USD 74).

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:

The average rainfall ranges from 650-850 mm.

Indicate the name of the reference meteorological station considered:

The rain estimate has been derived based on the agro-ecological zone (AEZ) the area falls under. Bhutan is divided into AEZs (source: https://www.fao.org/3/ad103e/AD103E02.htm).

Agro-climatic zone

The area falls under Cool Temperate Zone. Bhutan has six AEZs. The wet sub-tropical zone is from 150 to 600 m, followed by the humid sub-tropical zone from 600 to 1,200 m. The dry sub-tropical zone starts at 1,200 m and extends to 1,800 m, followed by the warm temperate zone, which reaches 2,600 m. The cool temperate zone lies between 2,600 and 3,600 m and, finally, the alpine zone between 3,600 m and 4,600 m.

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:

2698 m.a.s.l.

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):
  • coarse/ light (sandy)
  • fine/ heavy (clay)
Soil texture (> 20 cm below surface):
  • coarse/ light (sandy)
  • fine/ heavy (clay)
Topsoil organic matter:
  • high (>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.

Moisture content-1.97%
Organic matter-6.19%
Organic carbon-3.60%
pH-6.61
Electrical conductivity-420.00 µs/cm
Nitrogen-0.18
Phosphorus-0.16
Potassium-155.07 mg/100ml
Soil texture-Sand Clay Loam

5.4 Water availability and quality

Ground water table:

5-50 m

Availability of surface water:

good

Water quality (untreated):

good drinking water

Water quality refers to:

surface water

Is water salinity a problem?

No

Is flooding of the area occurring?

No

Comments and further specifications on water quality and quantity:

There are no risks of flooding as the area is located on hills.

5.5 Biodiversity

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

Intercropping of vegetables with fruit-bearing trees in orchards increases biodiversity within the orchard ecosystem.

5.6 Characteristics of land users applying the Technology

Sedentary or nomadic:
  • Sedentary
Market orientation of production system:
  • mixed (subsistence/ commercial)
Off-farm income:
  • less than 10% of all income
Relative level of wealth:
  • average
Individuals or groups:
  • individual/ household
Level of mechanization:
  • mechanized/ motorized
Gender:
  • women
Age of land users:
  • middle-aged

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)?
  • small-scale
Comments:

1 acre of land

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

Land ownership:
  • individual, not titled
Land use rights:
  • individual
Water use rights:
  • communal (organized)
Are land use rights based on a traditional legal system?

Yes

Specify:

The land user right follows national policy and rights.

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

crop production

decreased
increased
Comments/ specify:

Crop production has increased due to intercropping.

risk of production failure

increased
decreased
Comments/ specify:

The risk of production failure is decreased due to crop diversity. Even if one commodity fails, other surviving commodities make up for the loss.

product diversity

decreased
increased
Comments/ specify:

Crop diversity has increased.

production area

decreased
increased
Comments/ specify:

Intercropping has led to maximum utilization of the orchard area.

land management

hindered
simplified
Comments/ specify:

Land management has improved with better land utilization through intercropping.

Water availability and quality

demand for irrigation water

increased
decreased
Comments/ specify:

Increase in water requirement due to full, efficient utilization of the land and more number of diverse plants growing on the land.

Income and costs

farm income

decreased
increased
Comments/ specify:

Farm income has increased due to diverse sources of income.

diversity of income sources

decreased
increased
Comments/ specify:

The land user has two different sources of income, fruits and vegetables.

workload

increased
decreased
Comments/ specify:

Increased workload due to many different crops covering the land.

Socio-cultural impacts

food security/ self-sufficiency

reduced
improved
Comments/ specify:

Farm income has increased due to diverse sources of income from intercropping.

SLM/ land degradation knowledge

reduced
improved
Comments/ specify:

Intercropping reduces nutrient depletion associated with monoculture.

Ecological impacts

Soil

soil cover

reduced
improved
Comments/ specify:

Soil cover has increased due to intercropping of different vegetables between apple trees.

soil loss

increased
decreased
Comments/ specify:

Soil erosion has decreased due to increased soil cover.

nutrient cycling/ recharge

decreased
increased
Comments/ specify:

Nutrient cycling has improved. Fruit trees absorb nutrients from the soil and release them back into the soil through decomposed fallen leaves, branches, or other parts.

Biodiversity: vegetation, animals

Vegetation cover

decreased
increased
Comments/ specify:

Vegetation cover has increased due to the growing of a mix of vegetables between the trees in the orchard.

plant diversity

decreased
increased
Comments/ specify:

Different vegetables are intercropped and rotated in the orchard.

habitat diversity

decreased
increased
Comments/ specify:

Different crops provide habitats to a variety of living organisms.

Climate and disaster risk reduction

micro-climate

worsened
improved
Comments/ specify:

Micro-climate has increased as fruit trees provide shade and regulate temperature, act as windbreaks, and the soil cover through various vegetables helps retain moisture in the soil by preventing erosion.

6.2 Off-site impacts the Technology has shown

impact of greenhouse gases

increased
reduced
Comments/ specify:

Intercropping enhances carbon sequestration in the soil.

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?
annual temperature increase moderately
seasonal temperature summer increase moderately
annual rainfall decrease not well

Climate-related extremes (disasters)

Meteorological disasters
How does the Technology cope with it?
local snowstorm well
Climatological disasters
How does the Technology cope with it?
cold wave well
Biological disasters
How does the Technology cope with it?
insect/ worm infestation 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:

positive

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

slightly negative

Long-term returns:

very positive

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?
  • 91-100%
Comments:

No subsidies

6.6 Adaptation

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

No

6.7 Strengths/ advantages/ opportunities of the Technology

Strengths/ advantages/ opportunities in the land user’s view
1. Increased land productivity: Intercropping vegetables in orchards allows for more efficient use of land by utilizing the space between fruit trees. This increases overall productivity and maximizes the yield from the same area of land.
2. Diversified income streams: By intercropping vegetables, orchard owners can generate additional income from the sale of different crops. This helps to diversify their revenue streams and reduce dependence on a single crop, thereby minimizing financial risks.
3. Improved pest and disease management: Certain vegetable crops can act as natural pest repellents or trap crops, effectively reducing the population of pests that target fruit trees. By intercropping, orchard owners can create a more balanced ecosystem, leading to better pest and disease management without relying heavily on chemical interventions.
Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view
1. Enhanced soil fertility and nutrient cycling: Intercropping systems often involve the planting of leguminous vegetables, such as peas or beans, which are capable of fixing atmospheric nitrogen and improving soil fertility. These vegetables can replenish nitrogen levels in the soil, benefiting the overall health and growth of both the fruit trees and the intercropped vegetables.
2. Weed suppression: Intercropping vegetables can help suppress weed growth in orchards. The dense foliage of intercropped vegetables can shade out and outcompete weeds, reducing the need for manual weeding or herbicide application. This results in reduced labour and cost associated with weed control.
3. Microclimate regulation: Intercropping can modify the microclimate within the orchard. The intercrop plants provide shade and windbreak, which can help regulate temperature, humidity, and air movement. These microclimate modifications can protect fruit trees from extreme weather conditions and create more favorable growing conditions, promoting overall orchard health.

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?
Competition for resources: Intercropped vegetables and fruit trees compete for essential resources such as water, nutrients, sunlight, and space. This competition can result in reduced growth and yield for both crops. Supply adequate nutrients.
Increased management complexity: Intercropping adds complexity to the management of the orchard. Different crops may have different requirements in terms of irrigation, fertilization, pest control, and harvesting, requiring additional attention and labour. Proper planning and management taking into consideration differing requirements.
Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view How can they be overcome?
Difficulty in weed control: Intercropping can make weed control more challenging. Different crops may have different susceptibilities to weeds, and managing weeds without harming the intercropped vegetables or fruit trees can be demanding. Weed management and different control measures should be taken.
Reduced crop specialisation: Intercropping can limit the space available for each crop, leading to reduced specialisation. This may result in lower yields compared to cultivating a single crop in a dedicated area with optimised growing conditions. Must keep proper/required spaces between each of the plants.
Harvesting difficulties: Harvesting intercropped vegetables in an orchard can be more time-consuming and labour-intensive compared to harvesting a single crop. The presence of fruit trees and the arrangement of different crops may hinder access and make harvesting more challenging. Mechanized harvesting may reduce time taken for harvest.

7. References and links

7.1 Methods/ sources of information

  • field visits, field surveys

Three fields

  • interviews with land users

Two land users were interviewed.

  • interviews with SLM specialists/ experts

Interviewd soil specialist and vegetable specialist of National Centre for Organic Agriculture (NCOA).

When were the data compiled (in the field)?

10/07/2023

7.2 References to available publications

Title, author, year, ISBN:

Mishra, U. & Wani, N. A. (2022). An integrated circular economic model with controllable carbon emission and deterioration from an apple orchard.

Available from where? Costs?

Google Scholar

Title, author, year, ISBN:

Hashemi, A. & Karamidehkordi, E. (2010). FARMERS'KNOWLEDGE OF INTEGRATED PEST MANAGEMENT: A CASE STUDY IN THE ZANJAN PROVINCE IN IRAN.

Available from where? Costs?

Free website

Title, author, year, ISBN:

Kumar, L. & Chhogyel, N. (2018). Climate change and potential impacts on agriculture in Bhutan: a discussion of pertinent issues.

Available from where? Costs?

Free source

7.3 Links to relevant online information

Title/ description:

An integrated circular economic model with controllable carbon emission and deterioration from an apple orchard

URL:

https://doi.org/10.1016/j.jclepro.2022.133962

Title/ description:

FARMERS'KNOWLEDGE OF INTEGRATED PEST MANAGEMENT: A CASE STUDY IN THE ZANJAN PROVINCE IN IRAN.

URL:

https://hal.science/hal-00510402

Title/ description:

Climate change and potential impacts on agriculture in Bhutan: a discussion of pertinent issues

URL:

https://agricultureandfoodsecurity.biomedcentral.com/articles/10.1186/s40066-018-0229-6

7.4 General comments

The land users in Yusipang commented that the production of vegetables in the orchard was done on a small scale and for self-consumption.

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