HomeMy WebLinkAboutThe Wingham Advance-Times, 1985-03-20, Page 50Clintonfarmer yes no till to control deciining productj;t
from page 8 o0history,
get a feel for planting problerr�s, management treatments,
effect on no -till corn,, cover ¢�rvop
or arieus Dover cro treatments, no,till vs conventienai till Obrn
ps and weed control and no -till vs conventional till soybeans on
problems in a no -till situation. Fbllowing various soil types.
evaluation of 1981 results, corrections were In additionLobb had
made. , corn variety trials,
In Lobb no -till vs convention till, no -till wheat and
cern 1982,andplanted 55 acrefi of no -till no -till barley on four locations. In contrast to
ac'r'es 'of no -till soybeans. the very favourable no -till weather in 1982
Included were 18 ground cover situations over
vvhach he had 33 cop treatments. The results (dry at planting time followed by good
after two years of work were moisture levels and a' long frost free autumn),
Mg, Lobb, work
to theme encourag- 1983 was much in reverse and a real learning
Mg, says could be but not to th point where experience, says Lobb.
The 1982 Huron County Soils and Cho Some observations Lobb has notedbut (keep m
Improvement 1 rhent innC Association l p mind Lobb is not doing research on Earn
1111
added substance to this evaluation. No -till evaluation, aeons his management, for his
yields were equal to or use. Observation a
are his own andd data is
greater than conven- based on his own
ricrac tillage more often than not in 1982, . machine harvest results.)
however, was no. --Where soil a or cQ
killing 'bosh until problems alternatives
mpahoul are
October 25. A normal September frost could1983 ternbbvha tq no -till bare
acres be
have craned the results somewhat where peed. Inh Lobb had some bare to
t prove that.
early growth had been slow or uneven. The --Next to drainage, crop sequence may be the
potential for no -till was however westab- principle limitation factor in tillage system
ell ciple
lashed._
In1983 Jane SadlertiRidrards under the follochois. Fbr example, no -till corn is best
direction of Dr. Terry Daynard gave much of 1982, no -till any cop other than Dom. In
the no -till work on the Lobb farm a resew corn after yielded 13 per Dent higher than no-tillnafter no-er nine
perspective - 28 treatrtrents in all, indulin till
g corn. In 1983, no -till conn following soys
yielded seven per cent high
er than conn litter
corn. These comparisons are on sandy loam,
which is less likely to show rotational benefit
than fine textured soil.
--Starter fertilizer placement and planter
operation may be unproved by adding plow
coulters ahead of fertilizer openers. Lobb's
1982 yields were improved by seven per cent
on sandy loam and 23 per cent on silty clay by
using these coulters at a depth of 15 - 20e
centimetres. This was the same yield increase in
registered when they compared the use of
starter fertilizer vs no starter fertilizer on an
adjacent site. Lobb believes it is important, at
least in the beginning with no -till, to apply all eco
of their Pplus some N and K with the planter, day
at least to soil test recommended level. 190
soiltesting along 'a no till vs conventional till an
junction on one site (sandy loanh`day Ioam)
indicates under his fertility I,i'6gra-i, thele
has been no relative change in fertility or pH ,.,H
will drop to unmanageable levels and no -till a
fertility will be concentrated at the surface - v-
ri
uhlike conventional till.
--A series of nitrogen fertilizer trials in 1982, • us
which included both NH3 and 28 per °cent in
indicated likely losses of N when 28 per cent are
was broadcast sprayed over corn stalk
residue. Lobb found an eighteen yield
reduction on one site diedred. In 1983
because soil conditions were very dry in late
June, he dose to side dress shallow with 28
per cent to meet this year's requirements.
One way or another N should be applied to
make adequate soil contact.
-Cover cops have been a problem where kill
is too late. In 1982, Lobb had yield
d pression of 13 - 17 per cent and moisture
creases of .9 - 3.5 per cent when planted in
grass legume hay and rye when growth was
too advanced vs no -till on relatives bare
ground. Shading and or allelopathic effects of
d Yang vegetation are likely causes. A 10
before planting kill of rye in 1982 product,
a dramatic innrovement' in crop perform-
ce - particulady on low organic soil. Fall or
early spring kill of grass and legumes seems
most effective and less expensive.
erbicide application with 28 percent N as
carrier, has been unreliable for Lobb. Of the
ety of procedures which he has tried, the
t -emerge type is most effective and when
ed with precision and care, has not
creased his weed control costs. l lerenniaLs
often cited as a no -till problem Lobb has
re0/41
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