What is Recycled Gypsum?
Recycled gypsum (calcium sulphate dehydrate) is a non-toxic mineral.
Plasterboard recycling is the process of turning waste plasterboard into recycled gypsum.
We recycle from the following two areas:
- Gypsum waste from new construction
- Gypsum waste from demolition and reconstruction
What does NPR gypsum consist of?
Recently our gypsum was analysed by a laboratory and we were issued a certificate of analysis which confirms our recycled gypsum meets the requirements of PAS109
(A specification for the production of recycled gypsum from waste plasterboard, issued by the British Standards of Institution.)
They found high levels of the elements listed on the left:
Gypsum breaking down Clay
Gypsum can be used to treat clay soils with high levels of sodium. It acts as a soil conditioner. High sodium or 'sodic' soils lose structure and have very low water infiltration rates, sodic soils can also become very hard when dry.
When gypsum is applied to sodic soil it replaces the sodium with calcium and magnesium which breaks down the clay particles.
The sodium is drained out of the soil, which then results in the clay swelling less and therefore it does not easily clog the pore spaces through which air, water & roots move.
This benefits you by soil improvement, better crop growth and no water logging.
The diagram shows you the clay where the Sodium(Na) is replaced with Calcium(Ca).The next stage is where the break dodwn happens and Magnesium (Mg) takes its place.
Gypsum balancing pH level in soils
Decreasing the pH of Sodic soils
Gypsum immediately decreases the pH level of sodic soils or near sodic soils from values often over 9 but usually over 8 to values from 7.5 to 7.8 these values are in the range of acceptability for growth of most crop plants.
Increasing the pH of Acidic soils
Gypsum can increase soil pH enough in some acid soils to decrease the level of soluble aluminium
What can Gypsum be used for?
Advantages to using gypsum
- Improves soil structure.
- Helps reclaim High level sodium soils.
- Improves conmpacted soil.
- Improves water runoff and erosion.
- Decreases pH of High level sodium soils.
- Increases pH of Acidic soils.
- Improves swelling clays.
- Prevents water logging of soils.
- Makes excess magnesium non-toxic.
- Corrects subsoil acidity.
- Creates favourable soil EC.
- Makes it possible to efficiently use low quality irrigation water.
- Helps plants absorb plant nutrients.
- Increases value of organics.
- Improve fruit quality and prevents some plant diseases.
- Is a source of sulpher.
- Helps prepare soil for No-till management.
- Decreases bulk density of soil.
- Decreases the toxic effect of NaCl(sodium chlorine) Salinity.
- Multiples the value of other inputs.
- Can decrease pH of Rhizosphere.
- Keeps clay off tuber and root crops.
- Decreases loss of fertillizer nitrogen into the air.
- Can be a source of oxygen for plants.
- Helps earthworms to flourish.
- Increases water retention in sandy soil.
- Increases crop yields, Gypsum for vaarious combinations of the above effects can substantially inrease crop yields from about 10% to 50%.