Register free!

Reply
 
Thread Tools   Display Modes
  #1  
Old 04-24-2009, 11:42 AM
JDUtah's Avatar
JDUtah JDUtah is offline
LawnSite Silver Member
 
Join Date: Nov 2007
Location: UT
Posts: 2,671
Compost blending pre-application

The story is, I am applying compost as my fertilizer throughout the year. I am blending it with various things to get a better turf response out of it. Last Friday I had some locked gates and had extra. It sat over the weekend, and by the time I got to it Monday it had ammoniated some of the urea. It smelt like ammonia, not too strong, but it was there. It was about 37% moist.

It was grade "A" certified yard waste compost that I had purchased. Plenty mature. Test results were 1.2%N - .5%P - .7%K. At my application rate (25 lbs dry weight per 1,000) that is only .3 lbs N per K. I blended in 1.5 lbs urea per 25 lbs dry weight which brought me to 1.02 lbs N per 1,000 sqft.

I am not concerned about my compost blends being too hot to apply as I know exactly what I am putting down, and exactly the rate at which I am applying it. I was just wondering if anyone has seen an ammoniated media that was surface applied, like my compost, harm a lawn (or the biology in the soil). So far neither seems to be a problem.

Another thing I am watching is N response. I am curious just how much N I lost from it escaping as Ammonia gas during, and shortly after, application. The organic matter and moisture in the compost should hold on to some/most of it, I would think.

My blend is always mixed the day of, or day before, the application. Again, by the time I could use this stuff the urea had already started to be mineralized. I was curious if I would get a faster response because of this 'head start' so I tested it on a plot.

So far there is no difference between the ammoniated compost and the urea compost areas. Time and observation will tell me how safe and effective I am when using slightly old blends like this. So far so good.

I am also considering applying the compost and then applying the urea (or the other way around). It seems I would loose more N to the atmosphere this way though, and my applications wouldn't be as effective. Not to mention the time spent in the field double applying it.

So what are your thoughts and experiences? Ever seen damage where .7 lbs of soluble N was ammoiated before a surface application and damaged the lawn? What concentration of ammonia is known to cause harm to turf (KBG, sometimes fescue)? Which application method do you think would minimize volatilizing (pre-mixing or double applying)?

Everything can always be improved. One process potentially leads to 3 other possibilities. Gotta love Kaizen and the questions it brings. What are your thoughts?

Thanks in advance!
Reply With Quote
  #2  
Old 04-24-2009, 05:06 PM
Smallaxe Smallaxe is offline
LawnSite Fanatic
 
Join Date: May 2007
Location: Central Wisconsin
Posts: 9,942
I thought the last thread was overthinking rotted OM... This is going to a whole new level? Just wondering...
__________________
*
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage
,,, I wonder what does...
*
Reply With Quote
  #3  
Old 04-24-2009, 05:20 PM
JDUtah's Avatar
JDUtah JDUtah is offline
LawnSite Silver Member
 
Join Date: Nov 2007
Location: UT
Posts: 2,671
It isn't that hard to calculate and blend everything. I don't think it is overkill. The same stuff has to be done with registered fertilizer (synthetic AND organic).

Knowing exactly what you are putting down, and how to control what you put down, is the foundation of a responsible landscape management program IMHO. Even with an organic program.

I do not consider it overthinking at all. I will gladly admit it is going to a whole new level though. At least when it comes to manufacturing your own ferts. Like I said, purchased ferts already consider/calculate/determine these things.

Reply With Quote
  #4  
Old 04-24-2009, 10:54 PM
DeepGreenLawn DeepGreenLawn is offline
LawnSite Silver Member
 
Join Date: Apr 2008
Location: Woodstock, GA
Posts: 2,372
my thoughts...

It seems to me that the urea you added and sat for a time was beginning to recompost. The microbes began to break it down there for letting off the ammonia smell.

As far as it hurting the lawn... I wouldn't think anything would have really changed other than the total amount of urea available due to either cycling it into the compost or lost to evaporation.

If you put the compost down straight away it is not tight enough to be able to produce the amount of heat that takes place in a pile. Its low density then keeps the pile cooler, the microbes I guess are unable to work as fast (this part I am speculating) and therefore the urea is not broken down and still soluble(?) for the plants.

Does this make since? Spread it out and it is no different than adding urea to your lawn, put it in the compost pile and it begins to be broken down. Tree and others have mentioned adding urea to compost piles to speed up the process, we all know the more N in the pile the faster the reaction so it seems to me you just gave the microbes something new to break down...
Reply With Quote
  #5  
Old 04-25-2009, 09:15 AM
Kiril Kiril is offline
LawnSite Fanatic
 
Join Date: Jun 2007
Location: District 9 CA
Posts: 18,316
Quote:
Originally Posted by JDUtah View Post
Knowing exactly what you are putting down, and how to control what you put down, is the foundation of a responsible landscape management program IMHO. Even with an organic program.
Problem is with your situation you will NEVER know exactly what you are putting down.
Reply With Quote
  #6  
Old 04-25-2009, 10:44 AM
terrapro's Avatar
terrapro terrapro is offline
LawnSite Bronze Member
 
Join Date: Sep 2006
Location: mid-mich
Posts: 1,234
You only apply about half a ton compost per acre?

25lbs per k is what you said in your post. Is this for maintenance or initial app? Maybe at 25lbs per 100sqft would be more effective, that would give you an 1/8 ton per k.
__________________
Terrapro Landscape Service
Landscape maintenance and gardening services
Licensed and insured professional horticulturalist
Snow removal- commercial and residential
www.terraprolandscape.com
Equipment list- A bucket and some pruners.
Reply With Quote
  #7  
Old 04-25-2009, 01:17 PM
JDUtah's Avatar
JDUtah JDUtah is offline
LawnSite Silver Member
 
Join Date: Nov 2007
Location: UT
Posts: 2,671
Quote:
Originally Posted by terrapro View Post
You only apply about half a ton compost per acre?

25lbs per k is what you said in your post. Is this for maintenance or initial app? Maybe at 25lbs per 100sqft would be more effective, that would give you an 1/8 ton per k.
Yes, 25 lbs dry per K... is my goal. This equates to 40 lbs of actual compost per K.

There are reasons that I apply at my rate.
Reply With Quote
  #8  
Old 04-25-2009, 01:26 PM
terrapro's Avatar
terrapro terrapro is offline
LawnSite Bronze Member
 
Join Date: Sep 2006
Location: mid-mich
Posts: 1,234
Quote:
Originally Posted by JDUtah View Post
Yes, 25 lbs dry per K... is my goal. This equates to 40 lbs of actual compost per K.

There are reasons that I apply at my rate.
I would love to hear your reasons. I am always willing to learn something new.
__________________
Terrapro Landscape Service
Landscape maintenance and gardening services
Licensed and insured professional horticulturalist
Snow removal- commercial and residential
www.terraprolandscape.com
Equipment list- A bucket and some pruners.
Reply With Quote
  #9  
Old 04-25-2009, 01:01 PM
JDUtah's Avatar
JDUtah JDUtah is offline
LawnSite Silver Member
 
Join Date: Nov 2007
Location: UT
Posts: 2,671
Quote:
Originally Posted by Kiril View Post
Problem is with your situation you will NEVER know exactly what you are putting down.
I understand that, but you must admit, I am doing better than the guy that doesn't care at all, and just throws whatever down as long as does (or even doesn't) get the lawn green.

"Do not let what you can't do stop you from doing what you can do"
Reply With Quote
  #10  
Old 04-24-2009, 11:37 PM
growingdeeprootsorganicly growingdeeprootsorganicly is offline
LawnSite Senior Member
 
Join Date: Jan 2008
Location: obamaland
Posts: 770
are you using 46-0-0?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 06:18 AM.

Page generated in 0.12021 seconds with 7 queries