Non-inversion deep cultivation [Belgium]

Diepe, niet-kerende bodembewerking

technologies_967 - Belgium

Completeness: 67%

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:

Gillijns Katleen

Catholic University of Leuven


SLM specialist:

Govers Gerard

Catholic University of Leuven


Name of project which facilitated the documentation/ evaluation of the Technology (if relevant)
Soil and water protection (EU-SOWAP)
Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)
Catholic University of Leuven (KU Leuven) - Belgium

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:


1.5 Reference to Questionnaire(s) on SLM Approaches (documented using WOCAT)

2. Description of the SLM Technology

2.1 Short description of the Technology

Definition of the Technology:

The technology consists of the use of cover crops and of a non-inversion seedbed preparation.

2.2 Detailed description of the Technology


The technology consists of agronomic measures. The most important thing is that the farmers are not allowed to invert the soil by ploughing. Farmers may only cultivate their fields at plough depths. Farmers also have to use a cover crop, if possible. In this way the soil is always covered with residues of a previous crop or with residues of the cover crop. The improvement of the ground cover protects the soil against different kinds of water erosion. In the long term period, the soil structure will improve (more organic matter in top soil) and more earthworm activity will be determined. The infiltration will increase.

Purpose of the Technology: Protecting the soil against erosion and increasing infiltration.

Establishment / maintenance activities and inputs: The farmer may never plough.

Natural / human environment: The technology is applied on cropland with annual crops.

2.3 Photos of the Technology

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



Region/ State/ Province:


Further specification of location:


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):



Total area covered by the SLM Technology is 0.0046 km2.

It's a field trial with 3 treatments. Every treatment is 4620 m² (see map). The 3 treatments are: non-inversion shallow cultivation, non inversion deep cultivation and conventional ploughing. In the region of this field, other farmers are also experimenting with the technology on their own fields.

2.6 Date of implementation

If precise year is not known, indicate approximate date:
  • less than 10 years ago (recently)

2.7 Introduction of the Technology

Specify how the Technology was introduced:
  • during experiments/ research
Comments (type of project, etc.):

In the Walloon part of Belgium and in the surrounding countries (France, Germany), farmers are already applying this technology for a long time. In Flanders, the technology was introduced in the 1970' by professor De Ploey of our Faculty. Farmers didn't see the benefits of the technology and decided not to implement the technology. Now, time has changed: farmers know that they have to do something against the erosion problem.

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

Land use mixed within the same land unit:


Specify mixed land use (crops/ grazing/ trees):
  • Agro-pastoralism (incl. integrated crop-livestock)



  • Annual cropping
Annual cropping - Specify crops:
  • cereals - maize
  • root/tuber crops - potatoes
  • root/tuber crops - sugar beet
  • wheat
Number of growing seasons per year:
  • 1

Longest growing period from month to month: Mar - Oct; Second longest growing period from month to month: Apr - Nov

Is crop rotation practiced?


If yes, specify:

normal sequence of crops at the farm: sugar beet - wheat - potatoes - maize. Crop rotation at the experimental field: maize - wheat -sugar beet

Grazing land

Grazing land


Major land use problems (compiler’s opinion): Soil loss by water erosion. Soil erosion related environmental problems 'muddy floods, retention pond sedimentation, declining water quality due to sediment and sediment - fixed contaminants)

Major land use problems (land users’ perception): Strong nitrogen regulations and EU rules are hindering the farmer.

Type of cropping system and major crops comments: normal sequence of crops at the farm: sugar beet - wheat - potatoes - maize. Crop rotation at the experimental field: maize - wheat -sugar beet

3.4 Water supply

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

3.5 SLM group to which the Technology belongs

  • improved ground/ vegetation cover
  • minimal soil disturbance

3.6 SLM measures comprising the Technology

agronomic measures

agronomic measures

  • A2: Organic matter/ soil fertility
  • A3: Soil surface treatment
  • A4: Subsurface treatment

Type of agronomic measures: cover cropping, manure / compost / residues, mineral (inorganic) fertilizers, breaking compacted topsoil, minimum tillage

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
  • Wo: offsite degradation effects
physical soil deterioration

physical soil deterioration

  • Pk: slaking and crusting
  • Pi: soil sealing

Main causes of degradation: other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (soil erosion), lack of knowledge

Secondary causes of degradation: other human induced causes (specify) (agricultural causes, hevay machinery)

3.8 Prevention, reduction, or restoration of land degradation

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

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

4.1 Technical drawing of the Technology

Technical specifications (related to technical drawing):

Technical knowledge required for field staff / advisors: high

Technical knowledge required for land users: high

Main technical functions: improvement of ground cover, increase of infiltration, improvement of soil structure

Secondary technical functions: control of raindrop splash, control of dispersed runoff: impede / retard, increase in organic matter

Cover cropping
Material/ species: maize 2004

Agronomic measure: cover cropping
Material/ species: winter wheat 2004-2005

Agronomic measure: cover cropping
Material/ species: oats 2005-2006

Agronomic measure: removing less vegetation cover
Remarks: by not ploughing, every year.

Manure / compost / residues
Material/ species: injection of slurry 2004
Quantity/ density: 40000l/ha

Mineral (inorganic) fertilizers
Material/ species: spraying N with seed 2004
Quantity/ density: 200 kg/ha
Remarks: 26%

Agronomic measure: mineral (inorganic) fertilizers
Material/ species: spraying N 2005
Quantity/ density: 120 kg/ha
Remarks: 38%

Agronomic measure: mineral (inorganic) fertilizers
Material/ species: spraying N 2005
Quantity/ density: 175 kg/ha
Remarks: 39%

Agronomic measure: manure / compost / residues
Material/ species: broadcast N 2005
Quantity/ density: 45 kg/ha
Remarks: 27%

Agronomic measure: mineral (inorganic) fertilizers
Material/ species: 30 % K
Quantity/ density: 800 kg/ha

Breaking compacted topsoil
Remarks: every year

Minimum tillage
Remarks: every year

4.5 Maintenance/ recurrent activities

Activity Timing/ frequency
1. injection of slurry, spraying paraquat (to kill previous crop) mar 04
2. sowing maize, nitrogen fertiliser apr 04
3. herbicides may 05
4. harvesting maize, sowing winter wheat nov 04
5. nitrogen fertiliser mar 05 / apr 05

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


Comparing to ordinary field operations, there are normally no additional costs if applying the new technique. The farmer will not plough anymore, this is an economic benefit. In some cases and for some crops the farmer will use another machine, for example: the farmer will need a direct drilling machine for sowing sugar beets in stead of a normal sowing machine. In Flanders, always agricultural contractors are sowing beets (not the farmers). The agricultural contractor will ask the same price for the normal sowing machine as for the direct drilling machine. Although farmers have no additional costs, they get subsidies (80€/ha.year for shallow cultivation, 200€/ha.year for no tillage) from the Flemish Government for practicing the new technique - subsidies are mainly given to encourage the farmers.

Additional info: herbicides - apr 05 / 2 herbicides - may 05 / 2 nitrogen fertiliser - jun 05 herbicides - jun 05 harvesting winter wheat - aug 05 fertiliser (manure) - sep 05 fertiliser K - sep 05 sowing oats - sep 05

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:


Agro-climatic zone
  • sub-humid

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%)
  • 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:

Slopes on average: 10 %

Landforms: The main topographgy is a plateau (100 above sea level) in which rivers are incised. The technology is applied at fields situated on the slopes between the plateau and the valley.

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 depth on average: The loess deposits, which vary in thickness between a few dm to several m cover Terti

Soil texture (topsoil): 60 % loam, 30% sand and 10% clay.

Topsoil organic matter: 1,2% (experimental field)

Soil fertility is high

Soil drainage / infiltration

Soil water storage capacity is medium and sometimes very high

5.6 Characteristics of land users applying the Technology

Market orientation of production system:
  • commercial/ market
Off-farm income:
  • less than 10% of all income
Relative level of wealth:
  • rich
Level of mechanization:
  • mechanized/ motorized
Indicate other relevant characteristics of the land users:

Population density: 200-500 persons/km2

Annual population growth: 0.5% - 1%

70% of the land users are rich and own 80% of the land.

Off-farm income specification: The farmer is only working at his own farm.

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

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

Land ownership:
  • individual, titled
Land use rights:
  • individual

6. Impacts and concluding statements

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Income and costs

farm income

Comments/ specify:

Because of reduced working time and lower fuel consumption

Other socio-economic impacts

special equipement


Socio-cultural impacts

SLM/ land degradation knowledge


farmers opinion of a non-ploughed field


Ecological impacts

Water cycle/ runoff

surface runoff

Quantity before SLM:


Quantity after SLM:


Comments/ specify:

Also 21 before, 18 after


soil cover

Comments/ specify:

More residues

soil loss

Quantity before SLM:


Quantity after SLM:


Comments/ specify:

Significant reduction in soil loss

Other ecological impacts


Comments/ specify:

More earthworms

use of herbicides


6.2 Off-site impacts the Technology has shown

downstream flooding

Comments/ specify:

Because of less runoff

groundwater/ river pollution


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:

very positive

Long-term returns:

very positive

6.5 Adoption of the Technology

  • single cases/ experimental
Of all those who have adopted the Technology, how many did so spontaneously, i.e. without receiving any material incentives/ payments?
  • 91-100%

Comments on acceptance with external material support: survey results

100% of land user families have adopted the Technology without any external material support

1 land user families have adopted the Technology without any external material support

Comments on spontaneous adoption: survey results

There is a strong trend towards spontaneous adoption of the Technology

Comments on adoption trend: Nowadays about 49% of the farmers in the region are practicing conservation tillage, whereas only 33% was doing it in 2001. At the beginning of the project 63% of the farmers intend to cultivate their fields in a conservative way into 3 years. (based on e

6.7 Strengths/ advantages/ opportunities of the Technology

Strengths/ advantages/ opportunities in the land user’s view
less soil erosion
Strengths/ advantages/ opportunities in the compiler’s or other key resource person’s view
The technology clearly reduces the erosion risk while maintaining profitability.
The new technology also ha other benefits on soil structure and biodiversity.

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?
high investment costs for buying new agricultural machinery
more attention to crop damages caused by slugs and mice should be given.
practising the new technology requires a relative dry soil
Weaknesses/ disadvantages/ risks in the compiler’s or other key resource person’s view How can they be overcome?
Practising the new technology requires a greater skill of the farmers education, training

7. References and links

7.1 Methods/ sources of information

7.2 References to available publications

Title, author, year, ISBN:

SOWAP Project. 2003-2006www.

Links and modules

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