We have an abundance up in Scotland as no one is using it, was used for bedding but there was a case of acattle being gassed, think it mixed with slurry. I heard a while back it basically for the cost of haulage.@Thedual1 , having high mag clays and gypsum being often recommended, what do you class as 'extremely cheap' ?. I am based in South West in a clay valley between cotswold hills.At this location Limestone is cheap ish. Gypsum is not by comparison .
I freely admit my A level chemistry knowledge has slipped.
to my knowledge there are basically 3 types of Gypsum:As I understand it there are lots of different grades of gypsum?
What is Calcifert S derived from? FGD gypsum?Calcifert S:
is it this stuff?
Don't know why they don't call it Gypsum when they claim it's pH neutral. The BIG question is: is it a Gypsum or is it a lime with "incorporated" S, which in this case has to be elemental S (elemental).
Nothing magic about it.
Mined gypsumAs I understand it there are lots of different grades of gypsum?
FGD gypsum (declining in amounts as coal fired power stations wind down) which, according to the EA all goes to plasterboard manufacture.
Recovered plasterboard gypsum, derived from plasterboard and screened and sorted to remove the backing paper, screws etc. As plasterboard is produced from FGD it therefore follows that part of the recovered plasterboard gypsum will be FGD derived. At a meeting I went to last July in London to discuss all this, this was the bit that the EA didn't like the most and goes some way to explaining the difficulty in trying the removal of the land spreading option in PAS109.
We have a very large plasterboard industry. Interestingly, as the coal fired power plants close there is a reduction in supply of FGD gypsum to plasterboard, as such the amount that they will accept from recycled means will increase. This will reduce the amount available to go to land.Interesting,
either you have a extremely large plasterboard industry
of you have only a small number of small power plants
One big power plant, using soft coal from open strip mining, has around 1th ton. daily of Gypsum. I'm not writing about prices, loaded, but I only can tell you: no one in farm supply industry is interested in marketing as:
- every one can go there and have trucks loaded for the same price
= no possibility of margin.
I had a contract of "daily a truck" of gypsum = 5 trucks a week. If you are 2 weeks short in a year of clients the profit is gone up the chimney. I was happy that I was able to go out of the contract after 3 month as I didn't want to put Gypsum where it was not needed. One farmer, the reason i looked for the source, started with a 500 t contract and did apply it, I didn't know about it, on fields where we hadn't rec's for Gypsum but lime. He shouldn't have ordered this amount to start with. 5 years down the line he admits that Kinsey is right, this soils are tighter and he needs 30% more hp for the same tillage tools than on other fields.