Tetra, the seedbed preparer for any seed size

The seedbed or vibrocultivator is a simple tool to use and maintain. It is a lightweight machine with low power consumption. Its role is to break the clods as a result of plowing to create a seedbed. The vibrocultor provides a sort of clods on the worked surface. This gives the advantage of sowing in a fine soil and thus favorable to germination.

TETRA

Seed-Bed Preparators Configure your Tetra

Easy to use and low maintenance
for perfect germination.
Seed bed preparation for seed sizes
from beet to field beans

To ensure optimal germination, Tetra offers you the ideal soil tillage for soil-seed contact.

Seedbed preparation
(Beet - France)
Seed bed preparers Beet - France - gregoire besson
Seedbed preparation
(Corn - Hungary)
Seed bed preparers Corn - Hungary - Gregoire Besson
A range of vibrocultivators
from 3 to 9 m working width
Tetra 50
Tractors:
Working width:
Transport width:
85 → 125 hp
62,54 → 91,97 kW
3,00 → 3,00 m.
9,84 → 9,84 ft
3,00 → 3,00 m.
9,84 → 9,84 ft
Seed-Bed Cultivator 3 m
Tetra 60
Tractors:
Working width:
Transport width:
125 → 210 hp
91,97 → 154,51 kW
4,50 → 6,00 m.
14,76 → 19,69 ft
3,00 → 3,00 m.
9,84 → 9,84 ft
Seed-Bed Cultivator 4.5 m or 6 m
Tetra 70
Tractors:
Working width:
Transport width:
210 → 310 hp
154,51 → 228,08 kW
7,50 → 7,50 m.
24,61 → 24,61 ft
3,00 → 3,00 m.
9,84 → 9,84 ft
Seed-Bed Cultivator 7.5 m
Tetra 80
Tractors:
Working width:
Transport width:
310 → 400 hp
228,08 → 294,30 kW
9,00 → 9,00 m.
29,53 → 29,53 ft
3,00 → 3,00 m.
9,84 → 9,84 ft
Seed-Bed Cultivator 9 m
What are Tetra’s agronomical advantages?
Surface levelling, sowing depth
It is cheaper and more profitable on any cultivated plot if plants are grown at the same time. For perfect plant emergence, perfect levelling is required. The Tetra allows you to level, smooth and re-consolidate the soil in a single pass.

Germination requires a seed depth which is deep enough to prevent the seed drying out but shallow enough to ensure a high rate of emergence and good plant density.
Seed bed preparers Surface levelling, sowing depth soil preparation
Soil-seed contact
To germinate, the seed must absorb a large amount of water. Once it has swollen, it will be able to live on its reserves while it waits for leaves and moves on to photosynthesis.

Access to water will be through soil contact. If soil clods are too coarse, the seed can’t get to it easily. Crumbling reduces the presence of obstacles to lifting and porosity provides access to water and oxygen.
Seed bed preparers Soil-seed contact soil preparation
Superficial crumbling
In order to have small clods on the surface and the fine soil underneath, you can adjust the degree of refinement in different positions on the machine.

In non crusting soil, the maximum degree of refinement and the best soil-seed contact possible is needed while avoiding rapid drying. The choice of ploughing depth also depends on pedo-climatic risks (crusting, dry conditions, etc.) during the germination and emergence phases.
Seed bed preparers Superficial crumbling soil preparation
Soil warming
To grow, each seed has to reach a minimum temperature in order to germinate. By mixing the top soil layers, the Tetra allows the soil to warm up more easily in the sun so the plant can reach the right temperature in order to grow.

The Tetra also gives the seed access to air. It can then absorb oxygen but also release carbon dioxide. By breathing, it can germinate.
Seed bed preparers Soil warming soil preparation
Tines for every type of seedling
Type of soil
Seed size
Vibrocultivator Straight profile, Double spring agricultural machinery
Vibrocultivator tines
Straight profile, Double spring
  • Spacing between tines: 4
  • Rows of tines: 94 mm
  • Width: 32 mm
  • Thickness: 12 mm
  • Length: 400 mm
Vibrocultivator S-Shaped, Double spring agricultural machinery
Vibrocultivator tines
S-Shaped, Double spring
  • Spacing between tines: 4
  • Rows of tines: 94 mm
  • Width: 32 mm
  • Thickness: 12 mm
  • Length: 400 mm
Vibrocultivator Straight agricultural machinery
Vibrocultivator tines
Straight
  • Spacing between tines: 5
  • Rows of tines: 60 mm
  • Width: 32 mm
  • Thickness: 10 mm
  • Length: 285 mm
Vibrocultivator S-Shaped agricultural machinery
Vibrocultivator tines
S-Shaped
  • Spacing between tines: 5
  • Rows of tines: 60 mm
  • Width: 32 mm
  • Thickness: 10 mm
  • Length: 285 mm
Clever design
Single beam chassis
Made of high quality steel with a diameter of 150 x 150 mm, the main beam of the Tetra resists torsion effects to give a long working life. Being closer to the tractor, the machine’s centre of gravity is more centralized. This makes lifting easier and improves balance on the road.
Vibrocultivator Single beam chassis agricultural machinery
Highly resistant swinging pivots
The vibrocultivators are equipped with pivot bars which allow the elements to swing. They are made of solid HTS steel (high yield strength) to provide flexibility to the lift and resistance to wear.
Vibrocultivator Highly resistant swinging pivots agricultural machinery
Components parallel to the ground
Once you have set the Tetra’s level, you can adjust the various working components. They are all 1.5 m wide and are independent. With the parallelogram and the swinging pivot, you can follow the field perfectly.
Vibrocultivator Components parallel to the ground agricultural machinery
Adjustable levelling blade
Rear-facing, the position prevents accumulation of earth. It is equipped with small depth-adjustable tines that trim and level the ground. Spring-mounted and mechanically or hydraulically height adjustable, it adapts easily to conditions.
Vibrocultivator Adjustable levelling blade agricultural machinery
Hydraulic locking
For greater safety during storage and transport, the frame is fully locked by a balancing valve on the jack. This prevents the machine from opening accidentally. No additional handling is necessary to (un)lock the machine.
Vibrocultor Hydraulic locking Hydraulic locking agricultural machinery
Maintenance-free roller
The twin roller side cover prevents small ridges forming between the roller elements to give uniform levels. Positioned inside the roller, the bearings are protected from splashes.
Vibrocultivator Maintenance-free roller agricultural machinery
Very low operating costs
Light clay
A light machine limits soil compaction by not overloading the tractor + equipment combination.
Seedbed preparation toolLight clay agriculture
Wide
With such a light weight, it can maintain a good working width while coupled to a small tractor.
Seedbed preparation tool Wide agriculture
Economical
Its weight-width ratio allows you to save fuel by making more effective and fewer passes.
Seedbed preparation tool Economical agriculture
Non-powered machine
Unlike rotary harrows, seedbed preparers have no Power Take Off (PTO). As a result, they use less energy.
Seedbed preparation tool Non-powered machine agriculture
Low wear
Vibrocultivator tines are made of high strength steel and are equipped with coulters. You only have to change the coulters when they are worn. The levelling blade tines are replaced less frequently,.
Seedbed preparation tool Low wear agriculture
Work rate
You are operational immediately with rapid folding and unfolding. Simple adjustments allow you to adapt the tools to different conditions in minutes. Thanks to generous working widths, you can prepare your seed beds in record time.
Seedbed preparation tool Work rate agriculture
1 versatile roller
for successful seedling preparation
Twin roller
Twin roller
Excellent dispersal of clods, even in pebbly soils, the twin roller roller perfectly finishes tine work and levels the surface. It has a double roller with staggered seating to avoid creating small ridges between the different roller elements.
Seedbed preparation tool twin roller agriculture

Leave no trace...

A track eradicator allows you to loosen surfaces compacted by tractor wheels. Water can then infiltrate and so avoid lower return from wheel tracks.

Grégoire Besson provides different track eradicators depending on the type of
wheels and the type of soil.

Narrow cast iron
  • Eradication width: 4cm
  • Sold by: 4
  • Ideal for depth and for making narrow passages in compacted soil.
Seedbed preparation tool Narrow cast iron agriculture
Duck’s foot
  • Eradication width: 28 cm
  • Sold by: 2
  • Perfect for shallow and wide work to erase tractor tyre tread marks.
Seedbed preparation tool Duck’s foot agriculture
Space-saving and secure transport and storage
The different elements of the Tetra are superimposed on each other when folded. This positioning avoids exposing tines to road users. This safety feature and its compactness are also advantages for storage.

DREAL road traffic approval.

Dimensions during transport or worst-case storage:
50
outil de travail du sol Tetra 50 gregoire besson
Width : 3,00 m. (9,84 ft.)
Height : 1,75 m. (5,74 ft.)
60
outil de travail du sol Tetra 60 gregoire besson
Width : 3,00 m. (9,84 ft.)
Height : 2,59 m. (8,50 ft.)
70
outil de travail du sol Tetra 70 gregoire besson
Width : 3,00 m. (9,84 ft.)
Height : 3,35 m. (10,99 ft.)
80
outil de travail du sol Tetra 80 gregoire besson
Width : 3,00 m. (9,84 ft.)
Height : 4,19 m. (13,75 ft.)
Recap
  1. 1.Ease of use
  2. 2.Real agronomic benefits
  3. 3.Quick settings
  4. 4.Very low maintenance
  5. 5.Intelligent design
  1. 6.Choice of tines and rollers
  2. 7.Low overall ownership costs
  3. 8.Effective track mark eradicators
  4. 9.Secure transport and storage
  5. 10.Adaptable to all types of seeds
Configure your Tetra www.gregoire-besson.com
Configure your seed bed preparer quickly
and get an idea of cost.
    * Prices excluding taxes, delivery charges, entry into service and customs duties. Estimated price, non negotiated public price, ex works. Amounts, options, currencies and exchange rates may vary from country to country and at any time.** Homologation-cancelling option in France
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