iAGCOI
Alrvllle. PA
FARMERS EQUIPMENT
3524 Delta Road
717-862-3967
Annvllle. PA
BHM FARM EQUIPMENT
Rt 934, 2 miles N. of Annville
717-867-2211
Bechtelsvllle. PA
MILLER EQUIPMENT CO.
RD #1
610-845-2911
Bethel. PA
ZIMMERMAN FARM SERVICE
1/2 mile West of Rt. 501 on School Rd.
717-933-4114
COLUMBIA CROSS ROAD
RD 2, Box 62
570-297-3873
Elizabethtown. PA
HERNLEY’S FARM EQUIPMENT
2095 South Market St.
717-367-8867
Fontana. PA
UMBERGER’S OF FONTANA, INC.
8 Miles East of Hershey on Rt 322
1067 Horseshoe Pike, Lebanon, PA
717-867-5161 /800-261 -2106
Georgetown. DE
BAXTER FARM, INC
RD 3. Box 360
302-856-9526
WERTZ FARM EQUIPMENT
6877 Lineboro Road (PA Route 516)
717-235-0111
Inaleslde. MD
GIBSON FARM EQUIPMENT
3120 Goldsboro Road
410-758-0262
Martlnsburo. PA
BURCHFIELD’S, INC
112 S. Railroad St.
814-793-2384
Mlfflinburq. PA
ALLEN HOOVER REPAIR, INC
RD #l, Box 227
570-966-3821
HETmCKFARM SUPPLY
RD #3
814-275-3507
Punxsutawnev. PA
LONDON FARM SUPPLY
814-938-7444
Quarrwllle. PA
GRUMELLI FARM SERVICE
929 Robert Fulton Hwy. (Rt. 222)
717-786-7318
Roxburv. PA
HOLTRY’S EQUIPMENT
10948 Roxbury Road
717-532-7261
Washington. PA
SCHOTT EQUIPMENT SALES
Route 18 North
2075 Henderson Ave
724-222-3780
Waynesboro. PA
B. EQUIP., INC.
8422 Wayne Highway
717-762-3193
GENUINE •
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Capitol Region
Agronomy Team
CORN AND LIQUID NITRO
GEN APPLICATION ISSUES
Mark Goodson
Agronomy Extension Agent
York County
Each year farmers have to
make decisions about nitrogen
fertilization of their corn. It’s
that time again. This article will
focus on pros and cons of various
popular methods of liquid N
application.
•Field nitrogen losses. Soils
tend to lose nitrogen easily -
this is a simple fact of nature.
Soil testing labs, including Penn
State’s, do not even test for
nitrogen because, by the time
the sample gets to the lab, the
nitrogen is lost to the air. Soils
lose nitrogen through volatiliza
tion (evaporation) of ammonia to
the air and through leaching
(percolation with water down
away from root zone) of nitrate.
Losing nitrogen either way costs
the farmer money and could
hurt the environment, including
his own drinking water well. The
earlier that nitrogen is applied
to the field before the crop actu
ally takes it up, the more vul
nerable it is to field losses.
•Liquid nitrogen. 30 percent
nitrogen solution (“liquid N”,
UAN, or “Niton”) is urea and
ammonium nitrate dissolved in
water. This popular, inexpensive
and versatile fertilizer is usually
applied at planting or as side
dressing. It is easy to handle
with pumps and hoses and often
the lowest cost material per unit
N.
Some of the nitrogen in liquid
N is from urea and prone to
volatilization. Volatilization of N
from urea occurs when urea is
not incorporated either by rain
or light tillage.
Once in the soil, most of the N
Lancaster Farming, Saturday, April 1, 2000-A2l
converts into nitrate within a
week or two The nitrate form of
nitrogen is easily leached and
can be lost through percolation
if crops do not use it before rain
fall pushes it out of the reach of
roots.
•Preplant versus preemerge
seedbed application. Placing all
the nitrogen in the seedbed,
either worked in at seedbed
preparation or applied with pre
emergence chemicals before the
corn emerges, is popular because
it gets the chore of N application
done early in the season.
Incorporating liquid N lightly
into the seedbed just before
planting is preferable to apply
ing with chemicals after plant
ing because it eliminates the
chance for N to volatilize if time
ly rains do not come. Each day
that passes without rain to
incorporate the N increase the
amount that is lost through
volatilization to the atmosphere.
However, applying nitrogen dur
ing seedbed preparation
requires an additional trip over
the field compared to N applica
tion with preemergence pesti
cides.
•Seedbed versus sidedress
application. Sidedressing is
often promoted because nitrogen
is applied close to the time of
plant uptake. This is good, sound
agronomy. However, it requires a
trip through the field when the
corn is up. Application equip
ment availability is also an issue
in some parts of the region. In
some cases, your local commer
cial custom applicator may have
all of their row equipment on
herbicide work at sidedressing
time. If sidedressing equipment
is available, consider applying
most of your N this way.
(Turn to Page A 38)