Re: Fwd: Nitrogen application rates

let me know what kind of lawn you have and I can look it up in my trusty
'turf management" book.

Andrea H
Beaufort, SC
Zone 8b

----- Original Message -----
From: "Bonnie & Bill Morgan" <wmorgan972@ameritech.net>
To: <gardenchat@hort.net>
Sent: Sunday, February 16, 2003 9:29 PM
Subject: RE: [CHAT] Fwd: Nitrogen application rates


> Great info, Cathy!  I imagine that applies to what we put on our lawns
after
> a fashion, too.
>
> Blessings,
>
> Bonnie
>
> -----Original Message-----
> From: owner-gardenchat@hort.net [o*@hort.net] On
Behalf
> Of cathy carpenter
> Sent: Sunday, February 16, 2003 3:35 PM
> To: gardenchat@hort.net
> Subject: [CHAT] Fwd: Nitrogen application rates
>
> Thought there might be some interest in this information on Nitrogen
> application rates from our extension ag educator. It is intended for
> farmers, but contains food for thought for us all.
> Cathy
>
> Begin forwarded message:
>
> > From: Mike Roegge <roeggem@uiuc.edu>
> > Date: Fri Feb 07, 2003  01:47:14 PM US/Central
> > To: roeggem@uiuc.edu
> > Subject: Nitrogen application rates
> >
> > Weekly Crop Update                  2-7-03
> > By Mike Roegge, University of Illinois Extension, Adams/Brown Unit
> >
> >     Our featured speaker at the recently held No Till Seminar, Dr. Fred
> > Below, presented his research on nitrogen rates. He looked at N rates
> > over a three-year period in a variety of cropping situations: no till,
> > conventional, C-SB and C-C rotations, on producersm fields and on
> > research farms. His objective was to determine the optimal rate of
> > nitrogen for plant yield. Not necessarily the economic rate, but the
> > rate at which, biologically, the plant quit responding.
> >     With over 40 site years of data, his findings were that in no
> > circumstances, did the corn crop require any more than 1.2 pounds of N
> > per bushel of yield. For many years, this has been the U of I
> > recommendation. And it hasnmt changed.
> > Actually, the average requirement was 0.9 pounds of N per bushel of
> > yield. The same need was found regardless of environment grown (tilled,
> > preceding crop, etc.). Interestingly enough, when plotted against
> > yield, those fields that yielded the lowest required the highest amount
> > of N (per bushel). The higher the productivity of the soil, the lower
> > the amount of N needed per bushel of grain.
> >     If nothing else, this work proved again, that 1.2 pounds of N per
> > bushel of corn is all that is necessary. There is already some lfluffn
> > built into this recommendation, so making applications of higher rates
> > of N only costs additional dollars and risks higher N losses.
> > Of course, make sure when you account for the 1.2 pounds, you include
> > incidental N (starter, DAP, 28%, etc.) and also take the soybean N
> > credit if that was your prior crop.
> >     We still have approximately 50% of the corn acres to receive
> > nitrogen this spring. Many producers still use rates higher than
> > recommended as insurance against the year when crop yields go through
> > the roof. They donmt want to get caught short. However, based upon this
> > research, and on other N research conducted by the U of I, there is no
> > need to lfluffn your N rate. Data from Dr. Bob Hoeft over an 18 year
> > time period found similar results. He found that by increasing N rate
> > by 30-40 pounds per acre over the 1.2 pounds actually led to decreased
> > net income.
> >
> >
> >
> > Mike Roegge             University of Illinois Extension
> > 330 S. 36th Street          Adams/Brown Unit
> > Quincy, IL 62301            r*@uiuc.edu
> > Phone: 217-223-8380         FAX: 217-223-9368
>
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