question about rock phosphate

9

95'ZR1

Active Member
I am currently using the rock phosphate in pellet form. If I were to turn these pellets into dust would I then have soft rock phosphate?

Where I am coming from is I'm wondering if I really have to buy a bag of soft rock phosphate. I want to use a teaspoon here and there in teas and also in my own soil.

what is the difference between pellet rock phosphate and soft rock phosphate?
 
  1. Soft Rock Phosphate: Sometimes called colloidal phosphate, comes from a variety of sources. Some are rock mineral with little or no industrial value because of their low analysis. More typically, soft rock phosphates are the by-products of industrial phosphate fertilizer manufacturing in the form of colloidal “slimes”. After processing the rock phosphate ore, the sludge left over is let away into waste phosphate ponds. The dried waste material dug from the slime ponds is marketed as soft rock phosphate or colloidal phosphate.
  2. Hard Rock Phosphate: The sedimentary layer that settled in ancient lake bottoms after being recycled countless times through living organisms. These sedimentary deposits consist of dead animal and plant debris. Hard rock phosphate is a very slow-release source of phosphorous, except in soils that are highly acidic, where the phosphorus breaks down more rapidly.
Phosphate rock is most effective as a phosphorus source on soils with the following properties:
  • Low pH
  • Low available soil P
    95'ZR1 said:
    I am currently using the rock phosphate in pellet form. If I were to turn these pellets into dust would I then have soft rock phosphate?

    Where I am coming from is I'm wondering if I really have to buy a bag of soft rock phosphate. I want to use a teaspoon here and there in teas and also in my own soil.

    what is the difference between pellet rock phosphate and soft rock phosphate?
    Click to expand...
    Google is your friend dude give it a try.
 
I've searched and found nothing. Most likely since I've never seen or heard of it being called "hard" it is always labeled and talked about as just rock phosphate.
 
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