Thanks

And if that is the case, why not just buy cheap ag sulfur? Also, it doesn't claim to be soluble.

As I understand it "cheap ag sulfur" must be incorporated in to be effective. Sprinkling it over an existing lawn or around the base of shrubs/trees will not work.

This product was recommended because it can be watered into the root zone where it is needed.

And yes, they do claim it to be soluble. This is copied from the instructions on their website (linked above):

"Apply dry and follow with a thorough DEEP and SLOW watering to dissolve the product, making certain that moisture reaches the root zone."

Sulfur is not soluble, sulfides are notoriously insoluble, and no sulfate can have 80% sulfate (and it specifically says "elemental sulfur" in any case).

My bet is that the water just breaks down the granular material into its smaller grains and that the "clays, wetting and dispersing agents" they mention help the fine disaggregated sulfur grains enter into the soil. That is exactly what wetting and dispersing agents are for.

It sounds like ag sulfur with a few additives. I'll bet it is a lot more expensive though.

Why wouldn't it be organic? Because fossil fuel was used to manufacture? Are you a certified grower? If not, why such a strict standard?

Dan

No, S is generally immobile in soil. Often the S smell in well water is from Hydrogen Sulfide that is present in certain rock at depth.

Dan

The hydrogen sulfide "rotten egg" smell in well water results from almost (though not exactly) the opposite process. Sulfate-reducing bacteria basically use the oxygen from dissolved sulfate (SO4--) and make sulfide (S--) which if it is in the form of hydrogen sulfide (H2S) will stink (metallic sulfides instead precipitate).

In oxygen-rich aquifers this sulfate reduction does not take place.

Sulphur 80%WDG (water dispersible granules) contains around 80% elemental sulphur, which is very finely ground to around 1 - 3 microns particle size. They are made wettable (not soluble like sugar) in water, and have good suspensibility in water for use in agriculture spray, etc.

We manufacture high quality sulphur products in india.
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Kevin

To be sure, the S has to be in contact with moist soil to start being utilized by the soil microorganisms that will essentially convert it to sulfuric acid and H+. There goes the soil pH. Sadly, I can't incorporate the S without tearing up the shallow tree roots so, I'm going the reduce it to a powder route and letting the water carry the fine particles method. Might just work in the ground right now as it is so damned dry there are 1"+ wide cracks running throughout the orchard floor.

Yes, the Great Plains are and always has been a desert, the wet years fool us into forgetting that FACT.

To be sure, the S has to be in contact with moist soil to start being utilized by the soil microorganisms that will essentially convert it to sulfuric acid and H+. There goes the soil pH. Sadly, I can't incorporate the S without tearing up the shallow tree roots so, I'm going the reduce it to a powder route and letting the water carry the fine particles method. Might just work in the ground right now as it is so damned dry there are 1"+ wide cracks running throughout the orchard floor.

Yes, the Great Plains are and always has been a desert, the wet years fool us into forgetting that FACT.