When plants suffer from a lack of water
Drought stress is one of the biggest challenges facing agriculture, viticulture, forestry and professional greening today. Prolonged dry spells, rising temperatures and irregular rainfall mean that soils dry out more quickly and plants are increasingly suffering from a lack of water. Young plants, young vines, reforestation and newly planted crops are particularly affected because their root systems do not yet reach deep enough in the first stages of development to safely tap water from deeper soil layers.
Scientific studies show that drought stress causes far more than just visible wilting. It impairs photosynthesis, reduces nutrient uptake, weakens growth and biomass formation and can significantly slow down root development. In practice, this means that the decisive factor is not just how much water is available, but how long it stays where plants actually need it – directly in the root zone.
Why drought stress develops more quickly today
The problem often begins not just with the lack of rain, but with its distribution. In many regions, longer dry periods alternate with short periods of heavy rainfall, meaning that water cannot seep evenly into the soil and be stored in the root zone. Part of it evaporates on the surface, while another part runs off superficially or seeps away more quickly into areas that young plants cannot yet reach.
In addition, rising temperatures increase overall evaporation, i.e. accelerate water loss via the soil and plants. Light and sandy soils are particularly sensitive to this because they buffer significantly less water than structurally stable, humus-rich sites. This is precisely why drought stress is no longer just a weather issue in many places today, but a key management issue in plant production.
Limits of classic irrigation
Supplementary irrigation remains an important tool for many crops. At the same time, scientific studies show that irrigation alone is often not enough if water is not retained efficiently in the soil. Rising water and energy costs, limited availability and losses due to evaporation make it clear that modern water management must do more than simply replenish water in the short term.
The crucial question is therefore no longer just: How much water is applied? But above all: How much of it remains available to plants in the root zone? It is precisely at this point that solutions that improve the water retention capacity of the soil and secure moisture specifically where it is effective for the plant become more important.
Water storage as a key factor
A healthy soil functions like a natural water reservoir. Humus content, soil structure, pore volume and organic matter play a key role in determining how well a soil can absorb and store precipitation and release it to plants with a time delay. If this storage function is restricted, plants experience water shortages much more quickly – even if rain has previously fallen.
In addition to humus formation and soil improvement, modern water-retaining hydrogels and superabsorbers are therefore becoming increasingly important. A recent review in the European Journal of Agronomy shows that biodegradable hydrogels were able to improve water storage in the soil by up to 50 percent in field studies; yield increases of 10 to 35 percent were also described under drought stress. This means that the focus is not only on the amount of water, but above all on the targeted availability of water in the root zone.
How hydrogels can help against dry stress
Hydrogels consist of hydrophilic polymer structures that can absorb water and dissolved nutrients and release them back into their environment over a longer period of time. In the soil, they therefore act as small water reservoirs directly in the root area. Current research shows that such systems can stabilize soil moisture, improve water availability and significantly alleviate drought stress in critical development phases.
In scientific trials, positive effects on root development, chlorophyll levels, biomass and plant vitality have been observed under drought stress. Hydrogels can therefore be a useful component in modern water management, especially for new plantings, on sandy sites and with irregular water supply.
Green Legacy in use against drought stress
Green Legacy starts exactly where drought stress occurs: in the root zone. The granules and hydrogels used are applied directly to the roots and can demonstrably store up to 300 times their own weight in water and dissolved nutrients. This stored reservoir is not released in an uncontrolled manner, but is made available to the plant as required. This means that water stays where it is needed for longer – directly in the active root area.
This has concrete practical benefits. Moisture can be retained in the soil for longer, water losses can be reduced and irrigation intervals can be sensibly extended. At the same time, plants benefit from a more even supply of water and nutrients, which can strengthen growth, root formation, growth and plant health. This effect is particularly relevant in sensitive phases such as young plants, new plantings, reforestation or on light soils.
Green Legacy’s solutions are used in agriculture, viticulture, forestry, horticulture and landscaping, on sports fields and in urban green spaces. Wherever dry periods, irregular rainfall or sandy soils make it difficult for plants to establish and develop, additional water storage can be a decisive factor. Green Legacy thus combines scientifically sound principles of water storage with field-tested applications for more efficient, modern and resilient crop management.
Sustainable water management is becoming a topic of the future
With increasing periods of drought, agriculture itself is also changing. Instead of relying exclusively on additional irrigation, the efficient use of existing water resources is becoming increasingly important. This includes better soil structure, humus build-up, reduction of evaporation, targeted water storage in the root zone and the use of modern water-storing systems.
Drought stress cannot be completely avoided in many regions. It will therefore be crucial to keep water available as efficiently as possible where plants need it: directly at the root. This is precisely the approach of modern, scientifically based water management that combines theory and practice in a meaningful way.
Selection of scientific sources:
- European Journal of Agronomy: Recent advances in biodegradable hydrogels for sustainable agriculture
- Scientific Reports: Radiation-assisted tailoring of swelling behavior and water retention of hydrogels under drought stress
- Scientific Reports: Synthesis and application of a multifunctional poly (vinyl pyrrolidone) hydrogel under drought stress
