The Rural Voice, 2003-12, Page 22GB
GREY -BRUCE CONSTRUCTION LTD.
R.R. 5 MILDMAY, ONTARIO
Phone (519) 367-2372
Fax (519) 367-2172
• Circular Tanks •
• Sandwich Walls •
• Concrete Foundations •
• Bunker Silos •
• Crane Rental •
• Excavation •
• Concrete Pumping •
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18 THE RURAL VOICE
decreased in size or stayed the same .
The danger of the saturation of
manure in the soil was mostly to the
farmer's own water supply, Rudolph
concluded. He advised farmers to test
the wells supplying their families and
livestock at least once a year.
The highest environmental risk
associated with concrete manure
tanks is with either a structural
failure, overfilling or flooding
through a major rainfall, Rudolph
said. Above -ground tanks represent
the highest risk of failure, even
though such failures have been rare
in Ontario.
He advised farmers to
investigate their tanks when
they are empty, perhaps using
a pressure washer to clean the walls
so any cracks can be spotted. The
tank can be repaired relatively
inexpensively if problems are found
in time.
Also visually inspect the transfer
pipe and connections, he advised.
Minimize the run off from outdoor
exercise yards and locate and
properly decommission former
manure -holding facilities. Locate
buried subsurface drains that could
carry spills a greater distance.
So what happens when you take
that manure to the field to spread it?
Three speakers looked at how
manure moves in soil and air, what
happens with antibiotics, hormones
and other "nasties", and what
happens to bacteria in manure.
Bonnie Ball Coelho of Agriculture
and Agri -Food Canada's London
research station said she was given
the impossible task of trying to
summarize in 20 minutes what could
be a two-week lecture on the
movement of nitrogen. The key
factor for both crops and the
environment is the uptake of nitrogen
from the soil into the plant, she said.
Crops take up mostly nitrate forms of
nitrogen but they can also take up
ammonia. Though it's more difficult
for plant roots to acquire ammonia
nitrogen than nitrate nitrogen, once
inside the plant it takes less plant
energy to use ammonia. As a result
some corn hybrids return higher
yields when fed ammonia nitrogen
rather than nitrate nitrogen. Hog
manure has more ammonia nitrogen
available for plants. One way to
make use of this is to side -dress
growing crops because the developed