FAQ

Here you will find answers to frequently asked questions about our innovative products and our commitment to sustainable solutions. Whether you want to learn more about the application or find out about the ecological benefits – you’ve come to the right place. Our aim is to provide you with detailed information and practical advice so that you can get the best out of our products. If you have any further questions, please contact us directly.

General information

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What is a water-retaining granulate or hydrogel?

A water storage granulate is a network of hydrophilic polymers that absorbs and stores water in order to release it again when required. A hydrogel is the gel forum of this polymer network created by water absorption. It stores the excess water after rain or artificial irrigation and releases it to the soil (and especially to the area around the plant's roots) when it dries out again.

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What exactly is drought stress?

Drought stress (or water stress) is the result of a lack of water in plants. It occurs when transpiration is greater than water uptake, resulting in a drop in internal pressure in the leaf cell. Abiscic acid forms in the roots and leaves and causes the stomata to close. This leads to a decrease in the internal CO2 concentration and subsequently to an inhibition of photosynthesis.

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Why do plants wilt?

Plants wilt mainly due to a lack of water, which plays a crucial role in their life processes. Water is essential for various metabolic processes in a plant, including photosynthesis and nutrient transport. Step-by-step explanation of why plants wilt:

  1. Water shortage: If a plant cannot absorb enough water from its surroundings, whether due to drought, poor irrigation or other environmental factors, a water shortage occurs.
  2. Compensation by cells: Initially, the plant's cells try to compensate for this deficiency by using water from their own internal reserves.
  3. Decrease in internal cell pressure (turgor): The turgor pressure is the pressure of the cell contents against the cell wall. Water helps to maintain this pressure. If there is a lack of water, the turgor pressure cannot be maintained as the cells begin to lose volume.
  4. Reduced stability and wilting: Turgor is crucial to the plant's ability to maintain its structure and stand upright against gravity. As the turgor decreases, the plants lose their stiffness and begin to wilt as they are no longer able to support themselves effectively.

Wilting is therefore a visible sign that a plant is under water stress and does not have enough water available to maintain its vital functions.

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Can a plant be watered too much?

Yes. Too much water in the soil displaces the soil air and deprives the roots of their vital oxygen and, in the worst case, suffocates them. The plant's pumping system collapses and the above-ground parts of the plant are no longer supplied with sufficient nutrients or water.

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What is the role of roots?

Alongside the stem and the leaf, the root is the most important organ of a plant. It mainly serves to absorb water and the minerals dissolved in it. Roots also ensure that the plants are attached to their location and store reserve substances. The area of the soil influenced by the roots is called the rhizosphere. The rhizosphere is the habitat of various organisms such as nematodes or fungi, which are in constant interaction with the plants and thus reflect the nature of an entire ecosystem.

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What is a superabsorber?

Superabsorbents, or superabsorbent polymers (SAP), are materials that can absorb and store large quantities of water in relation to their own weight. This characteristic makes them particularly valuable for agriculture, especially in dry regions or during periods of drought, as they help to use water efficiently and retain moisture in the soil for longer.

At Green Legacy, we produce biodegradable superabsorbent polymers (SAP). Our environmentally friendly superabsorbents contain no microplastics and therefore help to minimize water loss, reduce erosion and improve soil structure. They support sustainable agriculture and reforestation without compromising soil or water quality.

Properties

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What is POLYGRAIN?

Polygrain is an advanced, environmentally friendly product that has been specially developed for use in agriculture and horticulture. It serves as a soil additive that offers various advantages:

  1. Biodegradability: Polygrain is 100% biodegradable. This means that it decomposes naturally after use and leaves no long-term environmental impact.
  2. Water retention: One of the main components of Polygrain is a superabsorbent that helps to retain water efficiently. This is particularly useful in dry areas or during dry periods, as it ensures the plants' water supply and reduces the frequency of watering.
  3. Nutrient supply: Polygrain also contains a water-soluble NPK (nitrogen, phosphorus, potassium) + Mg (magnesium) starter fertilizer. This composition ensures an immediate supply of nutrients to the plants, promotes growth and improves the overall health and productivity of the plants.
  4. Improving the soil structure: The plant cellulose contained in Polygrain helps to improve the soil structure. It increases the porosity of the soil, improves aeration and facilitates root growth.

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How does POLYGRAIN work?

The mode of action is comparable to that of a sponge. It can store up to 200 times its own weight in water and the nutrients dissolved in it. These are released to the plants' root environment as required via the capillary effect. This process is repeated until the granules have been broken down by soil organisms due to their lifespan of up to 5 years.

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How long has POLYGRAIN been around?

POLYGRAIN represents the further development of the proven product Polyter. Polyter has been used successfully for over 25 years in a large number of crops worldwide. POLYGRAIN has been available on the market since 2023 and builds on the solid foundation and experience gained with Polyter.

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What is the difference between POLYGRAIN and POLYTER?

As a new development, Polygrain is the direct further development and replacement for Polyter, which was launched in 2023. It builds on the experience and technology of Polyter and brings improved properties.

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Is POLYGRAIN harmful to the environment?

No, polygrain is not harmful to the environment. In fact, it is an environmentally friendly option for agriculture and horticulture as it is 100% biodegradable. The product was specially developed to offer an environmentally friendly alternative in these areas. It does not accumulate in the plants, which means that it leaves no harmful residues in the plants that are harvested and consumed.

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Is POLYGRAIN biodegradable?

Yes, Polygrain is biodegradable. It is broken down by various macro- and microorganisms in the soil. This natural degradation process means that polygrain has no long-term negative impact on the environment after use. This makes it an environmentally friendly choice for use in agriculture and horticulture, as it helps to maintain soil health and quality without harming the environment.

APPLICATION / APPLICATION

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How do I use POLYGRAIN?

The correct application of POLYGRAIN is crucial for its effectiveness and should be carried out carefully. POLYGRAIN is inserted into the soil near the roots. For new plantings, it is ideally distributed in the soil (hole) below the roots or the seedling. This can be in dry form (granulate form) or in already swollen form (gel form). The advantage of applying it in swollen form is that the plant is immediately supplied with water. When used in dry form, it is advisable to water promptly. POLYGRAIN does not work on the surface, but only under the soil in the root area.

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How do I dose POLYGRAIN?

To determine the correct dosage of Polygrain, you can download the specific instruction folders directly from our website in the respective application area. These folders provide detailed information on the correct quantity and application, adapted to different plant types and soil conditions. If you have any further questions, please do not hesitate to contact us.

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Can I overdose on POLYGRAIN?

When using POLYGRAIN, the recommended dosage according to the application instructions must be observed. This applies in particular to container plants, as the swelling behavior of the granules can cause the plants to lift if the application rate is exceeded.

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How often do I have to use / apply POLYGRAIN?

Polygrain provides a long-lasting effect in the soil that can last up to five years. To ensure continued effectiveness, it is recommended to repeat the application of POLYGRAIN after five years at the latest. This top dressing helps to maintain the optimum soil structure, water retention capacity and nutrient supply necessary for healthy plant growth.

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Can POLYGRAIN also be used retrospectively (revaccinated)?

POLYGRAIN can also be used to inoculate established plant populations. This post-inoculation helps to maintain the long-term effectiveness of the product and improve soil quality and plant health. This means that older plants can also benefit from the advantages of POLYGRAIN and continue to enjoy optimum growing conditions.

APPLICATION AREAS

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In which areas can I use POLYGRAIN?

POLYGRAIN is used in various areas, including forestry, viticulture, fruit growing, vegetable growing, horticulture, ornamental plant cultivation, lawns, communal gardens and parks, as well as home gardens and allotments. It can be used for new plantings as well as for established plant populations (through subsequent inoculation).

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Is POLYGRAIN approved in Austria?

Yes, POLYGRAIN is approved as a soil additive in Austria in accordance with § 9a DMG 1994. This approval covers all crops and therefore also allows POLYGRAIN to be used in food production.

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For whom is POLYGRAIN interesting?

POLYGRAIN is aimed at a wide range of professional users, including farmers, foresters, winegrowers, fruit growers, vegetable growers, gardeners, landscapers, local authorities such as municipalities and cities, as well as anyone involved in the maintenance of green spaces and gardens.

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How long does Polygrain last in the soil?

POLYGRAIN has a long-lasting effect in the soil and can remain active for a period of 3 to 5 years before it is completely degraded.

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Is POLYGRAIN biocompatible?

POLYGRAIN is not yet approved for organic farming.

EMPLOYMENT OPPORTUNITIES

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Where is POLYGRAIN available?

POLYGRAIN is available in every Raiffeisen Lagerhaus agricultural branch in Austria and via the BayWa AG online store in Germany.