Healthy soil is the foundation of every harvest.

Understanding soil compaction

The problem: compaction as an invisible yield brake

Soil compaction occurs when heavy machinery is driven over the soil too often and too quickly after plowing, i.e., turning the soil. The result: the average pore volume is reduced, air circulation is blocked, and water movement is inhibited.

Plow pans: The critical horizon

The plow pan forms where the plow cuts and turns the soil – usually at a depth of 25 to 35 cm. A dense, resistant layer forms at this interface, which becomes even more compact with each subsequent pass. Roots cannot penetrate this barrier, causing water to accumulate above it or flow off the surface. It can also happen that plow soles are washed away and the entire field partially subsides.

Effects on plants

• Restricted root growth: Roots remain shallow and cannot reach deeper water and nutrient reserves.
• Waterlogging: Water collects above the compaction and leads to oxygen deficiency
• Drought stress: During dry periods, shallow roots dry out more quickly because they cannot draw water from deeper layers
• Restricted soil life: Microorganisms need oxygen – compacted soils offer little habitat

Visible symptoms

• Uneven growth
• Waterlogging after rain that does not drain away in depressions, allowing foul-smelling gases to form underground
• Drought stress: During dry periods, shallow roots dry out more quickly because they cannot draw water from deeper layers
• Cracks in the soil during drought (a sign of compacted soil and poor soil structure), which can also lead to fields being washed away during heavy rainfall.

Long-term consequences

Compacted soils lose their fertility. Humus decomposition is accelerated, erosion on slopes increases and accelerates the degradation of the valuable humus layer. This also reduces yield potential in the long term. Many farmers try to compensate for this with more fertilizer, more plant protection, and more irrigation – which costs a lot of money and only exacerbates the problems in the long term.

Mechanically breaking up soil compaction—without turning or mixing, i.e., while largely maintaining the soil structure—is the first step toward regenerative soil health.

Non-destructive deep-acting loosening instead of traditional deep loosening

Our proposed solution: Deep, fine hairline cracks without destroying the soil structures

Our approach to non-destructive deep-acting loosening aims to break up the compaction layer without destroying the soil structure or mixing the soil. The method: narrow tools that penetrate steeply into the compaction layer and compress it until it breaks. When the compaction layer breaks, fine hairline cracks are naturally driven into the soil, which can develop half a meter to the left and right and up to 2 meters deep over the following 7 to 14 days.

DUTZI front subsoiler and rear subsoiler: Precise, non-destructive deep-acting loosening

DUTZI cultivators work with 7–8 cm narrow tools that penetrate the soil behind leading disc coulters. The disc coulters slit the surface so that the cultivator tines can engage cleanly without tearing up the surface. This increases effectiveness and reduces the power required by the tractor.

How does crack formation work?

The narrow tools compress the compaction layer by not undercutting it, but only penetrating it steeply to a depth of about a hand's width. When the compaction layer breaks, funnel-shaped hairline cracks form, which branch out in depth. These cracks open up the soil permanently – they remain for months and are further expanded by rain, roots, and soil life.

Why narrow tools?

• Less power required: Narrow tools move less material, consume less diesel, and put less strain on the tractor.
• No smear layers: Wide plow bodies that slide under the plow sole can form a smear layer under the plow sole if the soil under the plow sole is moist.
• Precise effect: The optimum working depth is usually 25–35 cm, depending on the depth of the compaction layer.

Set the working width correctly:

Working too deep is counterproductive: If you plow under the plow sole with narrow tools, you prevent the desired crack formation, consume too much fuel, and achieve no additional effect. It is important to work with the FL or HL precisely in the area of the compaction layer and to compress it.

Combination with surface cultivation:

The front subsoiler complements the DUTZI KR perfectly. While the FL opens the soil deeply, the KR crumbles the soil to a depth of 5-8 cm, works in crop residues, and creates a plant-friendly structure. The subsequent roller reconsolidates the soil.

Result after loosening:

• Increased rootable space
• Increased average pore volume
• Improved usable field capacity
• Higher water absorption capacity
• Activated soil life
• Prevention of waterlogging
• Better aeration down to deeper layers

A single, non-destructive deep-acting loosening can already make a difference – provided that the soil is then cultivated gently (no heavy driving over wet soil, no turning). However, it is better to use the loosener at least once, perhaps even twice a year on the fields. This is the only way to achieve sustainably loose soils with high load-bearing capacity. And this is the only way to save fuel in the long term, reduce tool wear, improve soil quality, increase soil fertility, improve soil health, and thus also increase crop yields.

Promote root growth

Deep roots = resilient plants

Roots follow the path of least resistance. In compacted soils, they remain shallow because they cannot penetrate the plow pan—regardless of whether the plants are shallow-rooted or deep-rooted. In loosened soils, the roots penetrate deeper and more robustly into the soil in both cases—and tap into water and nutrient reserves that would otherwise be unreachable. Root growth itself is visibly stronger.

Why deep roots are crucial:

• Drought resilience: Deep roots reach moisture from deeper soil layers even during droughts.
• Nutrient uptake: Many nutrients (nitrogen, potassium, magnesium) are available in deeper layers
• Stability: Deeply anchored plants are more wind-resistant, especially in the case of cereals and corn
• Long-term soil structure: Roots stabilize soil pores, even after they die

Root growth after DUTZI loosening:

Studies show that roots penetrate significantly deeper after Non-destructive deep-acting loosening with DUTZI machines – often more than 1 meter deeper than in unloosened comparison plots. They follow the hairline cracks created by the narrow tools and stabilize these cracks through their growth. In doing so, they also improve soil structures.

Particularly crucial in dry conditions

In dry years, the advantage of deep roots is clear: while shallow-rooted crops show signs of drought stress, deep-rooted plants remain green and vigorous. The reason: they reach water at depths where the soil is still moist.

Practical example: Corn after DUTZI loosening

A farmer reports an extreme case: after heavy rainfall, water stood on the field. He carefully drove in with the front subsoiler to open up the soil below. A week later, the water had seeped away. The corn continued to grow normally – and showed no signs of stress even in the subsequent dry phase, because the roots were able to draw the previously seeped water from deep below.

Conclusion:

Non-destructive deep-acting loosening creates the conditions for deep root growth. Deep roots make plants more resilient to extreme weather – both drought and heavy rainfall. Strong roots are also an advantage in hailstorms, because plants with robust root systems are more likely to recover.

Activate soil life

Microorganisms need air and water

Healthy soil is full of life: bacteria, fungi, earthworms, springtails, nematodes, and much more. These organisms decompose organic material, build up humus, make nutrients available to plants, and stabilize the soil structure.

Why soil life suffers in compacted soils:

Microorganisms need oxygen. This is lacking in compacted soils because the pores are compressed and there is no air circulation. The result: aerobic microorganisms die off, anaerobic processes set in (putrefaction instead of decomposition), and the nutrient cycle is inhibited.

Non-destructive deep-acting loosening as an activating impulse:

When the soil is loosened deep down, air penetrates into deeper layers. Microorganisms are activated, decomposition processes accelerate, and nutrients are released. The cracks created by DUTZI loosening create additional colonization areas for microorganisms.

Earthworms as an indicator:

Earthworms are excellent bioindicators of soil health. They dig tunnels that transport air and water and produce valuable worm humus. They are absent from compacted soils, but their populations increase in loosened soils.

After non-destructive deep-acting loosening with DUTZI machines, farmers report significantly higher earthworm populations. The vertical hairline cracks provide ideal conditions for earthworms to penetrate deeper layers.

Humus formation through active soil life:

Microorganisms convert organic material into humus. Humus stores water, binds nutrients, stabilizes the soil structure, and sequesters carbon. Active soil life is therefore a prerequisite for humus formation.

Incorporating crop residues correctly:

The DUTZI KR works crop residues shallowly (5–8 cm) into the topsoil – where most microorganisms are active. The residues are evenly distributed, crushed, and supplied with oxygen. Decomposition begins more quickly and nutrients become available to plants.

Long-term effect:

Once activated, soil life stabilizes itself – provided that the soil is not damaged by renewed compaction or chemical pollution. Farmers who have been working with DUTZI machines for years report visibly darker, humus-richer soils.

Conclusion:

Seedbed preparation is soil activation. Through non-destructive deep-acting loosening, controlled crumbling, and shallow incorporation of crop residues, DUTZI machines create the conditions for vital soil life—and thus for long-term soil fertility.

Improving water management

Store water, channel water – as needed

Water is a critical resource in agriculture. Too much water leads to waterlogging, oxygen deficiency, and rot. Too little water leads to drought stress, stunted growth, and crop failure. Good water management regulates both: rapid infiltration during heavy rainfall and long-term storage during drought.

The problem with compacted soils:

Compacted soils absorb water poorly. When it rains, puddles form and water flows off the surface (erosion) without penetrating deeper layers. During droughts, surface water evaporates quickly, leaving deeper layers dry.

Non-destructive deep-acting loosening improves infiltration:

The hairline cracks created by DUTZI loosening act as vertical drainage channels. Water penetrates quickly into the depths instead of accumulating on the surface. This prevents erosion, silting, and waterlogging.

Practical example of heavy rainfall:

A farmer reports: After a heavy rainfall event, water stood on the field. He carefully drove the front subsoiler into the wet soil to open it up. Within a week, the water had seeped away. The corn, which had previously been standing in water, recovered completely – and later, during the dry phase, made use of precisely this water from deep down.

Water storage deep underground:

Deep loosening creates additional pore volume in the subsoil. This volume can store water – available to roots, protected from evaporation. During dry periods, roots can reach and use this water.

Increasing usable field capacity:

The usable field capacity describes how much water a soil can store that is available to plants – between field capacity (soil holds water against gravity) and permanent wilting point (plants can no longer absorb water).

Deep loosening increases the usable field capacity because:

• More pore volume is created
• Roots penetrate deeper and tap into more soil layers
• Water penetrates deeper, where it evaporates more slowly

Prevention of waterlogging:

Waterlogging occurs when water stands above a compacted layer and cannot seep away. The result: oxygen deficiency, rot, root damage. Plants in waterlogged soils turn yellow, wither or die.

Non-destructive deep-acting loosening with the FL or HL breaks through the barrier, allowing water to drain away, oxygen to flow in, and roots to grow.

Erosion protection:

When water runs off the surface, it takes soil with it – erosion. Loosened soils absorb water more quickly, reducing runoff and preventing erosion. This protects not only your own soil, but also adjacent areas and bodies of water.

Conclusion:

Good water management is the result of good soil structure. DUTZI machines create this structure mechanically – through non-destructive deep-acting loosening, controlled crumbling, and targeted crack formation. The result: water penetrates, is stored, and remains available to roots – in heavy rainfall as well as in drought.

Practical examples

Soil preparation on the farm – three scenarios:

Scenario 1: No-till farming with compaction problems

A farm has been working without plowing for 10 years. The soil is showing increasing compaction at a depth of 25–30 cm – visible through uneven growth, puddle formation after rain, and shallow roots. The farmer decides to use the DUTZI FL 3000 front subsoiler.

Procedure:

• Soil analysis: Penetrometer shows compaction at 28 cm
• Working depth FL: 35 cm (hydraulically adjusted)
• Combination: FL + KR 3000 + seed drill (OnePass)
• Time: Autumn, after harvest, in dry conditions

Result:

• Water seeps away quickly after rain, no more puddles
• Roots penetrate 15 cm deeper in rapeseed than on uncultivated reference areas
• Yield increase: +8% compared to the previous year (without compaction)
• Fuel savings: 60% compared to separate operations (cultivator + harrow + seed drill)

Conclusion: A single, deep loosening already shows an effect, but does not solve the problem in the long term. The FL should always be used with the OnePass method. The user saves time and money and usually achieves higher yields...and ever-higher margins!

Scenario 2: Grassland with waterlogging

A grassland farm struggles with waterlogging on heavy clay soils. After rain, the water stands for days, the turf suffers, and trafficability is restricted. The farmer uses the DUTZI FL 2500 front subsoiler.

Procedure:

• Working depth: 25 cm (shallow, so as not to destroy the turf)
• Speed: slow (4–5 km/h)
• Time: spring, before the first cut, when the soil is dry

Result:

• Water seeps away more quickly, waterlogging significantly reduced
• Turf remains intact, only slight surface disturbance
• Trafficability improves significantly
• Grass yield increases by 12% (better oxygen supply, deeper roots)

Conclusion: Non-destructive deep-acting looseningalso works in grassland – gently and effectively.

Scenario 3: Extreme use during heavy rainfall

A corn farm experiences heavy rainfall. 80 mm of rain in 2 hours, water covers the entire field. The corn has already been sown and is in danger of dying. The farmer ventures extreme use: DUTZI FL 3000 on wet soil.

Procedure:

• Working depth: 30 cm
• Speed: very slow (3 km/h)
• Objective: Open up the soil, drain the water
• Risk: smearing, tracks

Result:

• The water has seeped away within 3 days
• Corn recovers and continues to grow normally
• Wheel tracks are visible, but the corn compensates for this with better root growth and stronger growth of the remaining cobs.
• In the later dry phase (July), the corn shows no signs of stress – the roots use the previously seeped water from deep underground

Conclusion: Non-destructive deep-acting loosening works even under extreme conditions – when used selectively and carefully.