Solubility in soil conditioners, such as gypsum, lime and dolomite is of utmost importance. The key to solubility is mainly in particle size. The finer the product, whether it be in gypsum, lime, dolomite or any other natural occurring mineral the quicker the result.
Natural raw gypsum, aglime and dolomite should be applied at least six months before cropping to achieve worthwhile results.
Recycled gypsum, superfine lime and dolomite however are a different story. Recycled gypsum from plaster board has been refined to very small particles in the production of the plaster board, making it far more soluble than raw gypsum, in other words, you can apply it just before cropping and get a good result.
In the case of Superfine lime, recycled lime and dolomite against aglime, you will achieve a much quicker response. The smaller particles are the secret to quicker results and of course higher yielding crops.
So with a larger particles, why are the REGYP recycled gypsum products so soluble? Because gypsum solubility is based on particle size and purity, a larger surface area and higher purity will increase solubility of the gypsum. To get a higher surface area you need a smaller particle size.
REGYP Recycled gypsum granules do not behave like larger very insoluble natural gypsum crystals. The reason is very pure mined gypsum that is used in plasterboard manufacture is milled down to roughly 100% passing 75um (like talcum powder) and then when we recycle the plasterboard wste you have larger granules that consist of thousands of these 75um particles stuck together. Once the gypsum granules become wet in the paddock they immediately start going into solution for soil and plant uptake.