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Alsta Hydrogel
Super Absorbent Polymer for Agriculture

Marketed under trade name of Alsta Hydrogel, this super absorbent hydrogel polymer has the capability of holding water up to 500 - 600 times its own weight, helping dry or rain fed agriculture retain water for longer periods, thereby minimizing irrigation frequency in drought prone and/ or rain fed agriculture areas.

Features & Benefits

  • Alsta Hydrogel polymer increases soil water retention capacity

  • Effectively reduces irrigation frequency

  • Limits water and nutrient loss through soil leaching

  • Hydrogel for agriculture reduces water loss through evaporation

  • Improves physical properties of the soil by enhancing aeration

  • Hydrogel agriculture use reduces water stress when mixed with substrate

  • Enhances plant growth by providing water and nutrients directly at the plant root zone

  • Reduces fertilizer usage by 15 - 30%

  • Reduces erosion and water runoff

  • Enhances plant performance, especially in arid areas

  • Protects environment against drought and groundwater contamination

  • Acts as an insulating material for plant roots in frosty winter conditions


Hydrogel Agriculture (Super Absorbent Polymer for Agriculture) is potassium based non-toxic polymer capable of absorbing and retaining water up to 300 — 500 times of its own size. When mixed with soil and sown at the root zone of a plant, it saves 65 – 95% of water. It's application is basic yet effective.

This polyacrylate hydrogel was created to develop farming in extreme climates, whether excessively hot, parched, and so forth. It assists with dry season, desertification, poor soil quality, and treatment. Rather than day to day watering, super absorbent polymer permits watering once a week, sparing time, money, labour, water.

Super absorbent polymer for agriculture can assimilate and hold huge amounts of water with respect to their own particular mass. Water retaining polymers which are delegated hydrogels, when cross-connected, absorb fluids through hydrogen bonding with water. Their capacity to retain water is an element of the ionic concentration of the watery arrangement.

Polyacrylate hydrogel polymer in agriculture is effective in water utilization in agricultural and horticultural crops in areas with rain fed agriculture, from little or negligible to limited irrigation conditions. It offers huge economic viability to cultivations and is a boon to dry states, also called the "future generation of farming".

Hydrogel polymer or superabsorbent polymer (SAP) is a system of polymer chains of hydrophilic nature (water-loving), with water as the dispersion medium. It is capable of storing more than 90% water and has a level of adaptability same as natural tissues, because of their huge water content.

Alsta Hydrogel Agriculture once added to soil and/ or substrate will absorb and hold huge amounts of water and supplements, nearly up to 400 - 800 times of its own particular weight. Hydrogel polymers formed through cross-linking polymer chains (physical, ionic/ shared bonding) are well known for their water absorption. Hydrogels are mostly homogeneous in nature. Super Absorbent Polymers, which are delegated hydrogels, retain watery arrangements through hydrogen bonding with water atoms. In de-ionized and de-mineralized water, Super Absorbent Polymer may assimilate 300 times its weight (from 30 - 60 times its own volume).


Potassium Polyacrylate based Super Absorbent Polymer

Potassium Polyacrylate is a polymer of a potassium cation and acrylate with an Absorption Capacity Index in the scope of 30 - 100. This polyacrylate helps in the germination of seedlings, with plants or for transportation of plants or seedlings. It is nontoxic, harmless, and non-polluting. Absorption Capacity Index (ACI) is defined as (weight of water saturated gel polymer minus dry weight of the polymer) /polymer dry weight.

Absorption Capacity Index (ACI) is defined as (Weight of Water Saturated Gel Polymer minus Dry Weight of Polymer) /Polymer Dry Weight
Why Potassium Polyacrylate?

Amid dry periods, sodium polyacrylate has a tendency to gather and form cross links which repress re-swelling when it is re-wetted. With a limited number of wet/dry cycles, sodium polyacrylate hinders plant development. This inhibition emerges as sodium particles in the sodium polyacrylate system are easily replaceable and absorbed by the soil particles or have a tendency to be exchanged with the cations on the surface of plant roots. The result is a condition that is different from an alkaline soil, which tends to affect and inhibit plant growth and soil hardening.


Dosage & Applications

Open Field & Protective Cultivation

Common plants and trees: 1.5 - 3.0kgs of Alsta Hydrogel per acre along with the Arboriculture practice improves and promotes seedling growth.Young plants: 10 - 20gms of Alsta Hydrogel is mixed with the soil matrix per tree.Fully grown trees: 40 - 100gms of Alsta Hydrogel per tree is mixed with the soil matrix.

Terrace Farming, Home grown Gardens, Vertical Farming

Alsta Hydrogel can be mixed with the soil matrix, for indoor and open air pots, growers, window boxes, verandah, porches, terraces, hanging, greenhouses and city scene. Using SAP proves beneficial to water usage, time, labour and lessening drought and wilting risks which come into light if the plant is not watered for long, enabling a greener and bloomer period.


Arboriculture is principally centered on individual woody plants and trees kept up for landscape and amenity purposes, ordinarily in gardens, parks, etc., under the general umbrella of agriculture. Alsta Hydrogel reduces mortality rate due to transplantation shocks and enhances root development. A hole is dug about three times the volume of the root, at the plantation site, and 1 - 2kgs of Alsta Hydrogel per m3 of soil is mixed. The plant is placed the bottom of the hole and is evenly filled with the treated soil. The top surface is covered with 5 cm of untreated soil so as to prevent UV degradation of the product.

Bare Root Dipping

To prevent desiccation of the roots of seedlings during transplanting or transportation, 1 kg of Alsta Hydrogel in mixed in 150 - 200L of water with/ without an additional fungicide/ bactericide, and allowing it to stand for 15 minutes.

Hydro Seeding

Alsta Hydrogel is commonly used in hydro seeding to stabilize newly graded soils. Mixed with cellulose mulch, it maintains a minimum surface area, permitting rapid sprouting of seedlings even in dry areas.


Alsta Hydrogel may be mixed dry into fertilizer preparations to reduce leaching of nutrients. Dosage 1 - 5 kg by weight. Helps in saving nearly 15 - 30% in fertilizer usage, reducing costs.

Hydroponics/ Soil less media

Alsta Hydrogel reduces the water stress when mixed with a substrate. For fully permeable mixes like barks, wood fiber, etc., 2 - 3kgs of Alsta Hydrogel per m3 of the substrate is mixed. For less permeable ones like peat or composts, 1 - 2kgs of Alsta Hydrogel per m3 of the substrate is mixed.

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More about Hydrogel Polymer

How does Hydrogel Polymer work?

Hydrogel polymer or polyacrylate hydrogel comes in crystal or powder, which jellifies upon contact with water or other liquids. These particles may be taken as mini water reservoirs in soil. It soaks up and stores water inside, with the capacity of absorbing nearly 400 – 600 times its own weight. Water from these reservoirs is released upon root demand through osmotic pressure difference. In arid areas, the use of hydrogel in sandy soils (macro porous medium) increases the water holding capacity, which significantly improves the quality of plants.


Hydrogel polymer can influence soil permeability, density, structure, texture, and evaporation rate of water through the soil. Hydrogel with excellent water absorption quality is an exceptionally helpful green and eco-friendly item for farming and agriculture fields. It can be used for farms and forestry services, sparing water for homestead and garden and enhancing trees' surviving ratio.

This aqua absorbent act as a reservoir of water and will only use the reserved resource at the time of need, allowing a better agricultural yield. Super Absorbent Polymers have a unique mechanism to absorb and retain water; discharging it only when the crop demands for it otherwise it does not lose out on the moisture level.

Reversible nontoxic nature of Hydrogel polymer

Hydrogel polymer comes in crystal or powder, which jellifies upon contact with water or other liquids. The absorbent powers of hydrogel polymer can be easily demonstrated by stirring a tea spoon of crystal or powder into a pint glass of water. The nontoxic and reversible nature of the product can be seen upon adding a solution of common salt (sodium chloride) on the crystals which then lose out water, returning to its original form.

Chemtex Speciality Limited is a leading hydrogel polymer manufacturer under the trade name Alsta Hydrogel for Super Absorbent Polymer for Agriculture.


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