(NH4)2SO4 Ammonium Sulfate breaks down fast to NO3 and is up taken by the plant very quickly. Therefore it helps to Green up. However it is an acid forming fertilizer because for every 1 pound of N you are applying 1 1/4 Pounds of Sulfur. BTW the Sulfur also helps in green up and is an important part of Photosynthesis. Old school chemistry was Iron Sulfate and Ammonium sulfate to create a Dark Green color. Iron Sulfate tears up your pump and stains everything.My boss has me using ammonium sulfate as a fertilizer for a quick green up. we're only doing 3 applications in the year up here. what are your thoughts on ammonium sulfate as a whole? also in a 3 step program?
How long is your growing season and how much N are you putting down with the ammonium sulfate? Ammonium nitrogen can have a substantial residual in certain types of soil. However, I use it as part of a spoon feeding program on grass that is growing 12 months out of the year. For northern areas, the best use of ammonium sulfate seems to be as part of the winterizer that feeds the grass for the winter and preps it for a good start in spring. I use it because it supplies sulfur and does things to soil chemistry that I need. Unless your soil is based on or is on top of limestone, you need to watch for rising soil acidity. Ammonium sulfate is a very good way to acidify soil.My boss has me using ammonium sulfate as a fertilizer for a quick green up. we're only doing 3 applications in the year up here. what are your thoughts on ammonium sulfate as a whole? also in a 3 step program?
Not 100% sure that's why I'm asking.There is no slow release in Ammonium sulfate--isn't that the opposite of what most universities recommend for turfgrass?
Urea is also fast-acting. How much faster is ammonium sulfate? Two weeks? Two days?
How much faster does it disappear due to leaching from rain or sprinkling? How much ends up as nitrate in the ground water?
Sulfur coated urea (blended with urea) works well in my area.