Is my gypsum wrong

Discussion in 'Growing Organic Marijuana' started by 2cent420, Jan 9, 2023.

  1. Online says gypsum says 22%ca and 19%s

    mine says 39%so3 and 27%caO

    Is mine wrong it’s agricultural gypsum and what I’ve always used ? I find different numbers online and wonder if I have some crazy different products for tractors or somthing

    why can’t I upload another pic it’s keep says error

    Attached Files:

  2. Gypsum is a mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). The two types of gypsum you mentioned likely refer to different forms or grades of the mineral. The percentages of calcium (Ca) and sulfur trioxide (SO3) listed in the descriptions likely refer to the relative amounts of these elements in the gypsum. The gypsum with 22% Ca and 19% SO3 likely has a higher percentage of calcium and a lower percentage of sulfur trioxide compared to the gypsum with 39% SO3 and 27% CaO. It is difficult to determine the specific properties or uses of these two types of gypsum without more information. /end chatgpt
  3. Web======================
    Gypsum is calcium sulfate (CaSO4). Refined gypsum in the anhydrite form (no water) is 29.4 percent calcium (Ca) and 23.5 percent sulfur (S). Usually, gypsum has water associated in the molecular structure (CaSO4·2H2O) and is approximately 23.3 percent Ca and 18.5 percent S (plaster of paris). Gypsum fertilizer usually has other impurities so grades are approximately 22 percent Ca and 17 percent S.
    Sand in your porridge.

  4. Well I’m kinda hoping to use the same everyone here does to gain desired effects that we all add it for

    I am worried that mine listing higher sulphur and in a different form than the normal that i may have the wrong one
    Having more sulphur would alter ph more and add less ca than what I am expecting to add if it’s wrong

    @BrassNwood sp I guess this is the wrong one I’ve been chucking on my beds
  5. Description
    Agricultural Gypsum (Calcium sulphate dihydrate) is a CE fertiliser-grade gypsum obtained from naturally occurring mineral. It is used in a variety of agricultural applications including as a carrier for horticultural dressings, as a mushroom composting ingredient, as a soil improver and in land reclamation after salt water flooding. Agricultural Gypsum (Calcium sulphate dihydrate) is also very good at breaking down heavy clay soils.

    Agricultural Gypsum (Calcium sulphate dihydrate) is a natural soil conditioner that will enhance growth of plants and grasses. As it is water soluble it will simply wash away leaving the goodness in the soil. It is simple and safe to use, simply spread by hand or machine on plants, lawns, etc.

    mineral content
    SO3 39%
    CaO 27%
  6. So calcium oxide
    And sulphur trioxide
    CaO + SO3 = CaSO4 calcium sulphate

    so with gypsum on indoororganics saying caso4 does that mean it’s got to be made by the bacterial populations ?
    And does that mean standard gypsum caso4 as mentioned has already done this ?
    The numbers so out I don’t wanna fuck my soil up again cause I overlooked 20% sulphur or somthing ya know
  7. I worked at a aquacultural gypsum mine here in Mound House Navada
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  8. Cool as ? Can you shed any light?
  9. LOL sure its brighter and more reflective then snow. Its so bright in the pit its blinding.
    I couldnt go into the pit without sunglasses.
    All the gypsum was sold to California farmers and Nevada by the semi load.
    I also believe it was used to PH the soil.
    Gypsum and DE Diatomaceous earth looks allot alike and have seen the different minerals where the mines are almost side by side .
    I know Kanas had or has underground gypsum mines use to make Gypsum Board/ sheet rock .
    We sold thousands of tons of ag gypsum for decades and decades.
    The company I worked for was the worlds biggest producer of ag Gypsum .
    Now ACG minerals owns all the mines .
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  10. #10 2cent420, Jan 9, 2023
    Last edited: Jan 10, 2023
    Cool as bro that sounds insane …
    But do you know any about this high sulphuric and effects on soil vs the normal lower sulphuric

    I think it’s from mine is before water and the one sold for gardens like here has lower sulphur as it converts at 75% when water is assed to cao and so3 cal oxide and sulphur + h2o = caco4 cal sulfate which is what is on the normal lower sulphur number

    As it reads caco4:h2o2 when converted
  11. Most of the stuff I read about adding gypsum to soil says it doesnt affect soil ph. The sulphur and calcium effectively cancel each other out.
    Im not sure I really buy that explanation. I would think in the short term they might cancel each other out, but in the long term they must affect changes one way or another in most soils, although I suspect its pretty insignificant.
    Not a chemist, just throwing my $.02 out there.
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  12. However, some believe that gypsum increases the pH of growing media as well. Why? Gypsum is calcium sulfate and it is assumed that calcium causes the pH of growing media to rise. Like gypsum, limestone contains calcium in the form of calcium carbonate. However, it is not calcium that increases the pH of growing media, but rather carbonate, by neutralizing acid (hydrogen ions). Likewise, calcium coming from gypsum does not increase a growing medium's pH. Individually calcium and sulfate can alter the pH of the growing medium immediately surrounding the roots, but the plant takes up both elements in nearly equal amounts through its roots. The result is a neutral effect on the pH of the growing medium. Gypsum should not be used as a limestone substitute, but as a fertilizer supplement to provide calcium and sulfate, both of which plants need for healthy growth. I think the following below links may help you in your analysis:
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  13. Please provide a link to what you've been reading. Your posts don't make sense.
  14. I’ll dig it back up lot to look through
    I just wondered as my gypsum has 20% more so3 than the normaly reccomended if it was safe as I would end up with more sulphur as I thaught

    but it seems the caO so3 when hydrated looses up to 75% of its mass as it converts to caso4 (gypsum) reducing the sulphur to match the normal gypsum number I guess

    but anyhow I’ve since learnt correct me if I am wrong but if it did have a shirt on more sulfur then it wouldn’t really matter on that element like it would the normal npk

    so I’m sure I don’t need to buy the 27/17 cause my 27/37 should be ok when I hydrate it

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