NEWARK, Dela. - Properly
used, nitrogen ranks next to
irrigation in its effect on com
yields. But this is one nutrient
fanners have to apply without
benefit of a soil test.
“Many attempts have been
made to measure available N or
predict the supplying power of a
soil, but the level is always
changing and an accurate measure
involves hitting a moving target,”
says University of Delaware
Agronomistr William Mitchell.
“As N becomes more expensive
and concerns grow about die fate
of N in our soils, we'll have to make
better wing shots or pay more
attention to the actual response
we’re getting from field ap
plications.”
At the present tune, he doesn’t
think people are following either
course successfully.
“Our recommendations for this
nutrient are based on the fuzzy
notion that 1.0 to 1.2 pounds of N
are needed to produce a bushel of
If you buy one of the above model tractors between June 1,1981 and June 30,1981, and choose not
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$lOOO Rebate may be applied toward your down payment.
Cash rebates e^.VP
If you buy any of our new Case farm *
tractors listed on the chart below.. between
June 1,1981 and June 30,1981 . Case will
send you a check for the dollar amount shown
on the chart for the model you buy. Rebate may
be applied toward your down payment NOTE;
Government Agencies/Departments do not
qualify for rebate.
Eligible Model
1190,1290,1390,1490,1690
2090,2290
2390,2590
4490.4690,4890
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2MKmurs
HUNSOVKE
Bethel. PA
<717)933-4114
A. L HERR ft BRO.
312 Park A ve.
Quarryville, PA
(717)794-3521
Nitrogen, how you put
com. This is a very crude guide
and, more often than not, it’s
wrong,” he says.
To illustrate, he points to com
yield data obtained last year in
held trials at the Delaware
Agricultural Experiment Station’s
research farm in Newark.
Without irrigation and N, the
yield was 33 bushels an acre.
Broadcasting 100 pounds of N as
ammonium nitrate before plowing
increased the dry land yield to 83
bushels. This was a 50-bushel in
crease for 100 pounds of N, or two
pounds of N per bushel of com.
When the broadcast N was in
creased to 200 pounds, the yield
went up 12 bushels, but for this
increase it took 8.3 pounds of N per
bushel.
Irrigation raised yields and
decreased the amount of N needed
to produce a bushel of com, though
in all cases it took eight to nme
pounds of N per bushel when the
second 100 pounds was applied as a
broadcast treatment.
Special offer on new
Case 90 series General Purpose tractors
. Optional super cash rebate
on new Case 1190,1290,1390,1490 and 1690 tractors.
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SI 000
$l2OO
$l5OO
C. S P. FULTZ Eimp.
ROl.
Spring Milk, PA
(814)422-8805
STOOFFER BROS., WC.
1066 UmWn Way Mtat
Chambersburg, PA
(717)243-9424
Of special treatment was the
unproved efficiency when N was
added through the irrigation
system. In this case the yield went
up from 39 bushels without N, to
163 bushels with 100 pounds of N.
This v represented a 124-bushel
increase with only 0.8 pound N per
bushel of com.
“With the pounds of applied M
per bushel of com produced
ranging from 0 8 to 9.1 on these
fjjj
Waiver of finance
charges until
January 1,1982
If you buy any of our new Case farm tractors shown on
the chart (left) or a used farm tractor of any make
between June 1,1981 and June 30,1981 and
finance itthrough JI Case Credit Corporation finance
charges will be waived from date of purchase until Janu
ary 1,1982
C.H. WALTZ SONS, INC.
RDI, Cogan Station, PA
(717)435-2921
I ft I SUPPLY, INC.
RDS, Danville, PA
(717)275-0927
2mi.S. offßte.s4
PEOPLES SALES ft SERVICE
Oakland Milk, PA
(717)463-2735
it on affects yields
plots, it’s obvious that the one
pound/one bushel rule has
limitations,” says the agronomist.
“The tuning and method of ap
plication of N can change this ratio
as well as the rate of applied N. Of
course, manure applications,
legume cover crops and tillage
practices will influence the total N
supply and must be considered as
part of the nitrogen rate picture.”
With nitrogen selling for 25 cents
GETTYSBURG Management
in the chicken flock is defined as
developing a routine or standard
operating procedure and following
it.
These routines or procedures
develop Into habits and often are
hard to evaluate and change. When
was the last tune you sat down and
PAUL SHOWER’S, INC.
35 East Willow St.
Carlisle, PA
<717)243-2686
E. W. HLEWICZ
Elmer Rd„ Richwood, NJ
(609)991-2692
BINKLEY ft HURST BROS.
133 Rothsvilte Station Rd.
Litta.RA
(717)626-470**
Lancaster Farming, Saturday, June 20,1981—D1l
Management in
SWANSON STAINLESS STEEL
SPRAYERS
A NEW 3 POINT HITCH SPRAYER WITH
SEVEN INTERCHANGEABLE HEADS
RB-26-100 3 Ft. (Shown Above)
FEATURING ... An Ace Centrifugal
Pump rated at 20 GPM at 100 PSI, 3
Strainers to cut down on plugging of
nozzles.
SOLD AND SERVICED BY:
LESTER A. SINGER
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a pound, the N cost per bushel in
this study ranged from 20 cents to
12.27, depending on whether it took
0.8 or 9.1 pounds to produce each
bushel. “To achieve this cost
advantage,” says Mitchell, “you
should avoid heavy broadcast
applications, carefully assess the
N contribution of animal wastes
and legume cover crops, and
sidedress or fertigate as much of
your N as possible.”
the chicken flock
thought through the reasons why
you operate the way you do?
Some of the things you need to
consider are your procedures for
disease prevention, vaccination
schedules, drug storage and use.
In addition look carefully at your
ventilation system, maintenance
of equipment and flock per
formance records.