pH

Does soluble grade ammonium sulfate change the pH of the solution water?

Yes. When dissolving incremental amounts of ammonium sulfate (AMS) up to 17 pounds per 100 gallons (covering typical AMS recommended rates as herbicide adjuvant) water pH went gradually down from 7.67 to 6.30.

Is it possible to create a reservoir of sulfur in the soil through the continuous application of elemental sulfur?

Yes, it is possible to create a reservoir of sulfur through long-term application of elemental sulfur. Be aware, though, that elemental sulfur oxidation produces acidity. So, with time, it may gradually decrease soil pH to the point

How would ammonium sulfate compare with urea when it comes to volatility on calcareous ground?

Even under calcareous conditions (soil pH 7.6-8.2), ammonium sulfate would still be less volatile than urea. This is because urea hydrolysis raises pH to significantly higher levels (as high as 9.0).

How would elemental sulfur compare against ammonium sulfate for decreasing soil pH from 7.3 to 6.3?

It depends on the rates used. Applied at rates that just cover a crop’s sulfur needs, neither one would do, regardless of the soil type. When thinking of these products as soil amendments, 200 to 400 pounds

I need to decrease soil pH from 7.3 to 6.3. Would ammonium sulfate do it?

Assuming a soil of low buffering capacity (low clay and organic matter contents), and as long as you apply it at rates that cover all of your crop’s nitrogen needs, ammonium sulfate could indeed be a really

The soil pH of my fields ranges from 5.8 to 6.3. Can ammonium sulfate improve phosphorus availability even under these slightly acidic conditions?

Yes. Since calcium phosphate may precipitate when soil pH is more than or equal to 5.5, ammonium sulfate’s acidifying effect may help improve phosphorus availability in your soils.

Is ammonium sulfate good for pecan trees in Texas? If so, how much?

As a matter of fact, ammonium sulfate is recommended more than other nitrogen sources on high pH soils (common in Texas) because of its acidifying effect. It temporarily increases the availability of micronutrients, such as iron and

How much can I expect soil pH to go down when using ammonium sulfate to supply all of my crop’s nitrogen needs?

At rates of several hundred pounds of ammonium sulfate per acre, the acidifying effect of ammonium sulfate would be in the order of hundredths of a pH unit. Based on a nitrogen rate of 140 pounds per

How much can I expect soil pH to go down when using ammonium sulfate to provide my crops with the recommended amount of sulfur?

At the low rates required to satisfy a crop’s sulfur needs, the acidifying effect of ammonium sulfate is insignificant – in the order of thousandths of a pH unit. Based on a calculation, for a sulfur rate

How much lime is needed to neutralize the acidity created by 200 pounds of ammonium sulfate?

Based on the Association of Official Analytical Chemists’ (AOAC) adopted figures, in order to neutralize 200 pounds of ammonium sulfate per acre, 226 pounds of calcium carbonate (CaCO3) per acre would be required (5.4 kilograms of CaCO3