Lawn Care Forum banner
1 - 20 of 26 Posts

·
Registered
Joined
·
1,862 Posts
Discussion Starter · #1 ·
By the looks of it, it appears most here are familiar with the "current/new" fertilization schedule now being promoted:
1. avoid late season Potassium applications (may promote snow mold)
2. Nitrogen applications beyond September are not necessary and provide no real benefit as the turf doesn't access any extra N beyond what is provided by a September feeding.

The "old/traditional" schedule was to apply a late season Potassium to harden off and strengthen the turf for winter survival and health and for a "high maintenance" lawn, apply N from late Summer through Fall with a pause to allow the turf to go into top-growth slow down, followed by a substantial winterization N application.

For a decade, I have used the "old/traditional", high maintenance schedule. Last year, I decided to try this new schedule. Has anyone else done a switch and if so, what has been your results? I realize our experience may be dependent on the region in which you are growing your cool season grass (KBG specifically) and although I'm most interested in results from those North of the the 39 lat., all experiences are welcome.
 

·
Registered
Joined
·
1,053 Posts
Ridgerunner said:
By the looks of it, it appears most here are familiar with the "current/new" fertilization schedule now being promoted:
I'm not familiar with this new program. Who is promoting it? Do you have a link to the paper/study that reached these conclusions, I'm sure it's a very interesting read. It kind of makes sense with the weather getting very cold early fall up north.
 

·
Registered
Joined
·
1,862 Posts
Discussion Starter · #3 ·
Crap.
Gonna need Becky's help here on the N issue. It is being suggested based on U of Wisc. study on a lawn care radio program that she once posted on another site. Maybe she would be so kind as to post a link.
The potassium issue is also based on a study posted about 2 years ago on another (cough) site.
Which kind of raises the issue: Anyone here growing a Poa A. or Bentgrass lawn? Lol.
 

·
Registered
Joined
·
1,053 Posts
I dug up some of the links:

http://hortsci.ashspublications.org/content/46/11/1545.full.pdf

http://www.blogtalkradio.com/turfnet/2015/10/05/frankly-speaking-with-doug-soldat-smart-fertilization-for-smart-turf-managers

http://www.golfdom.com/rethinking-fall-soluble-nitrogen-fertilization-of-cool-season-grasses/

http://hortsci.ashspublications.org/content/46/11/1545.full

http://archive.lib.msu.edu/tic/golfd/article/2012nov33.pdf
 

·
Registered
Joined
·
1,824 Posts
Ok, here is the Frankly Speaking podcast I remembered from 2015, which is probably the same one J4 found:
http://www.turfnet.com/blog/4/entry-1021-dr-doug-soldat-late-season-nitrogen-management/
This should be of interest:
http://purdueturftips.blogspot.com/2014/11/is-it-too-late-to-apply-my-last.html
And I take you back to the article I linked to on root growth:
https://www.google.com/url?sa=t&source=web&rct=j&url=http://archive.lib.msu.edu/tic/tgtre/article/1996feb1a.pdf&ved=0ahUKEwilwJ_il9TTAhUI4yYKHekbAWYQFggfMAA&usg=AFQjCNEECNyFz9sqtCq-jrv4iUUlZhGgLA&sig2=Tm2-SworRClopjlhv9IFcQ/url
Late fall and winter is prime time for root growth. Dr. Soldat is questioning how effective uptake is in the late fall.
 

·
Registered
Joined
·
1,053 Posts
GrassDaddy said:
I've heard of this, but have no experience with "the new way". But I can say the old way worked great so I'm not sure what the agenda is here.. If it worked great, how are they arguing that it doesn't work?
I don't think they're arguing that it doesn't work, I think what they're arguing is that parts of it are unnecessary(e.g part of the nitrogen doesn't get used). It doesn't really affect me, because my growing window is different than up north, but you always have to be weary of hidden agendas. Sometimes a study comes out with no peer review, then 100 articles reference that one study, then you get lobbyists referencing "hundreds of scientific articles" supporting the position. That's kind of how it works nowadays. Anyway, the way to really tell is to try it and see what the results are - if you get the same results with less nitrogen, it make sense both from a financial and an environmental perspective to reduce input.
 

·
Registered
Joined
·
1,824 Posts
Dave Moody did the potassium study:
https://www.google.com/url?sa=t&source=web&rct=j&url=http://turf.unl.edu/turfinfo/Fall%2520Fertilization.pdf&ved=0ahUKEwi9mLLXlYTUAhXE6CYKHar3D6MQFgghMAI&usg=AFQjCNG671BQImOlu5H1qV0yg0czdo3b4A&sig2=tHHlDruYlM7gApY34-notg
There is probably more info out there but this is what I found quickly.
 

·
Registered
Joined
·
2,984 Posts
j4c11 said:
Sometimes a study comes out with no peer review, then 100 articles reference that one study, then you get lobbyists referencing "hundreds of scientific articles" supporting the position. That's kind of how it works nowadays.
Very true and astute. Reminds me of "97% of climate scientists agree" ploy.

I'm all for less applications though, mainly because I'm a cheapskate. I also like the idea of doing a personal test and seeing what happens. OSUturfman has been shouted down and had posts censored (not on this site) for suggesting "less is more" and "more isn't always better" when it comes to certain applications like Milo, etc.
 

·
Registered
Joined
·
1,862 Posts
Discussion Starter · #17 ·
GrassDaddy said:
I've heard of this, but have no experience with "the new way". But I can say the old way worked great so I'm not sure what the agenda is here.. If it worked great, how are they arguing that it doesn't work?
j4c11 beat me to this on the N issue. Studies apparently show that the extra N after October isn't being utilized or more specifically only 10-20% is being taken by the turf.
The potassium issue is that excess soil K levels (presumably created by a late Fall K app has rexulted in higher incidence of snow mold on Poa A and Bentgrass.
 

·
Registered
Joined
·
2,984 Posts
I'm using a desktop, but the easiest way to multi-quote is to use the "Full Editor and Preview". Doing so will show previous replies in the thread down below the text entry box. There is a quote button in each reply and you can click it to add that quoted reply to your reply.
 

·
Registered
Joined
·
1,053 Posts
Ridgerunner said:
Studies apparently show that the extra N after October isn't being utilized or more specifically only 10-20% is being taken by the turf.
Let me make sure I understand this correctly, are you saying that even though there is excess nitrogen in the soil, the grass is able to regulate its intake of nutrients and only take in what it wants/needs?
 

·
Registered
Joined
·
1,862 Posts
Discussion Starter · #20 ·
ericgautier said:
I'm curious... Ridgerunner can you elaborate more on your "current/new" fertilizer schedule? What you apply and dates?
The "new schedule that I used last year was 1#N June 1, 1# N August 15ish and 1# N, P and K on September 15. About 2 1/2# less N annual and 3# N less after September than my "old" traditional schedule. Also No K after September vs. the "old" schedule

"Old" schedule used years Prior, I would do 1/2# N, P and K early to mid May, 1# N June 1, 1# N September 1, 1# N, P and K October 1, and 2# N mid to late November as the winterizer.
 
1 - 20 of 26 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top