[dacoach]

I want to put on ammonium sulfate and then pre. later on. In Nebraska with clay lawns with a high PH, I thought adding A.S. first to break up the binding of the PH and then put down pre with a slow release fertalizer. How much time should I leave in between the apps. since A.S. is a fast release fert? My biggest problem is controlling foxtail and some crabgrass.

Thanks,
Dacoach

 

[RAlmaroad]

Coach:
Don't know what weather, soil or temps are like in Omaha so just guessing, but couldn't you put down your pre-em now...it should be down when temps are about 45-50 ground temp. Then put down your ammonium sulfate (21% Nitrogen) later when the grass greens up. I sorta think that you may need some potassium also. Is there any particular reason for putting down your Nitrogen later. If that soil is that compacted, you might think of an aeration this fall. You probably could even do it now without too much damage. Maybe one of the plains guys will chime in and help you out. You pre-em if down in time will slow down the crab and other weeds. However if you wait and those seeds germinate, you will be stuck and needing to spray for weeds.
Been a rough winter, had it.

 

[SOONER GREEN]

Applying AMS won't do much to relieve a high ph and clay soil on the short term. There are much better ways to get that done than with AMS. Getting your pre down is the first thing you should do, if the turf needs fert then maybe a combo product with AMS in it would be the ticket. Sulfur and aeration will be the best way to get the ph in line, and loosen the clay.

 

[Mowerman2112]

In our location, I try to sell aeration spring and fall, alot think they need power raked and sampled several yards not the case! I am using dry with 17% Sulfur, a good PH meter is a great tool!