
Melanie
Barkley
Bedford County
meh7@psu.edu
814-623-4800
John
Berry
Lehigh County
jwb15@psu.edu
610-391-9840
Don
Fretts
Fayette County
dcf3@psu.edu
724-438-0111
Stan McKee
Huntingdon County
sam36@psu.edu
814-643-1660
Greg
Strait
Fulton County
gls10@psu.edu
717-485-4111
John
T. Tyson
Mifflin County
jtyson@psu.edu
717-248-9618
Lee
Young
Washington County
ljs32@psu.edu
724-228-6881
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Production Agriculture and the Environment in Pennsylvania
by
Melanie Barkley
Bedford County Extension Educator
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Pennsylvania is rich in natural resources
and farmers are very committed to protecting these
resources. Many farmers have adopted several conservation
or best management practices and seek to further
improve the environmental stewardship on their farms.
Here are a few of the ways that farmers protect
the environment on their farms. |
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Nutrient Management
Nutrients produced by livestock operations are added
to crop and pasture land to improve the soil quality
as well as add nutrients needed for plant growth. Farmers
are encouraged to take soil tests every three years
to determine the amount of manure and fertilizer as
well as lime needed to maintain optimum soil fertility.
Nutrients are added each year to account for the amounts
used by plants grown on the fields. Farmers also adjust
commercial fertilizer rates to take into account the
manure nutrients that were added to the soil.
Manure analysis can tell a farmer how much nitrogen,
phosphorus, and potassium he has in the manure from
his farm. Or, he may opt to use values based on industry
standards for the type of manure produced on his farm.
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Large farms that have more than two animal units (an
animal unit is 1,000 pounds of animal) to the acre for
spreading manure are required to development a nutrient
management plan for their farm. This plan considers
the amount of nutrients that are produced by the animals,
how much of those nutrients will be used by crops planted
on the farm and how to manage the use of these nutrients
to protect the environment.
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Some small farm owners have voluntarily chosen to develop
their own nutrient management plan not only to help
them best manage the nutrients produced on the farm,
but to help them make decisions to decrease the amount
of commercial fertilizers purchased for crop production.
Because spreading manure is time consuming, farmers
may also use a manure storage structure to store the
manure nutrients until an optimum time to spread the
nutrients on the fields. Typically, farmers will empty
their storage units before planting in the spring or
in the fall. Farmers are also likely to add liming materials
in the fall to adjust pH levels for spring planting
and the growing season.
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Farmers often spread
lime in the fall to give the soil time to adjust the
pH levels for spring planting and the growing season.
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Farmers use nutrient management practices in pasture systems
by developing watering sources in each paddock and moving
salt/mineral feeders. This prevents livestock from congregating
at watering areas and around feeders where they tend to deposit
more manure. Moving feeders and waterers into various paddocks
helps to disperse the nutrients more evenly across the total
pasture system.
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Water Quality Management
Water quality is very important to a farmer for raising both
livestock and crops. Livestock producers can incorporate a
number of best management practices to help prevent soil erosion
and manure nutrient runoff into streams. Livestock can be
fenced out of streams through stream bank fencing programs.
A defined point is developed for livestock to cross over the
stream or to drink water from the stream. This area is reinforced
to prevent erosion and is known as a stream crossing. Other
methods that farmers use to preserve water quality is to develop
an area where springs run from a hillside. The water is collected
to flow into a trough where the livestock can drink. An over
flow in the trough can place extra water back into a stream.
Occasionally a farmer may incorporate a storage structure
into the spring development. By adding a frost free hydrant,
the farmer can then distribute water throughout his pasture
system using the spring development as his water source.
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| Spring developments collect water from
a wet area of the field and use that water to fill a concrete
trough that livestock can drink at. The spring development
has an overflow that can drain into a nearby stream.
Another feature that some farmers add to their spring
development is a collection box that can store water
during dry periods. This collection box may also feed
a frost free hydrant located at another location in
the pasture system. Water can be transported by water
pipe to any paddocks within that pasture system.
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These calves are
drinking from a spring development that collects water
from wet areas to prevent soil damage during wet periods
of the year.
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Another practice that farmers use to protect water quality
is to allow buffer strips between crop land and a water source.
This buffer strip may be a grassed area or an area planted
with trees. These areas prevent any runoff from the fields
from entering the water source.
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Contour strips look
like stripes across the landscape, but are very effective
for preventing soil erosion.
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Crop Management
Anyone who has driven through farming country in Pennsylvania
should be familiar with the strips of crops that create
a pattern of stripes across the landscape. These are
known as contour strips because they follow the contour
of the land and prevent water from running off and creating
soil erosion problems.
You may also find grassed waterways between the fields
to control any runoff. This slows down the flow of water
and directs it into a water source such as a stream.
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Terraces are used to also control runoff and erosion. A terrace
is a flat area of earth with sloping sides that is situated
one above the another along a hillside. They are built into
a sloped area to reduce the amount of slope.
On any of the fields you may find crop residues after harvest.
These residues from the crop not only slow down runoff, but
they also provide additional organic matter for the soil.
Cover crops are crops that are typically planted in the fall
of the year to provide "cover" on a field for the
winter. This reduces soil erosion, captures free nitrogen,
and again provides organic matter to improve the soil.
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More frequently, farmers use integrated pest management to
determine when and if a crop should be sprayed with a pesticide.
Farmers will identify and count the number of weeds in a specified
area of a field or they may count the numbers of specific
insect pests in a specified area. Using an Agronomy Guide,
they can determine the "economic threshold" for
spraying. This simply compares the number of weeds or insects
and the cost of spray materials with the associated reduction
in yields. When the weeds, insects, or diseases reach a certain
level, then it will be economical to spray to control them.
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When spraying, farmers use best management practices. Prior
to spraying, farmers will calibrate their sprayer so that
the correct amount of pesticide is delivered to each acre.
They adjust the pressure on the sprayer to control the droplet
size. The larger droplets are less likely to drift away from
the intended spray area. Farmers prefer to spray during the
early morning hours to minimize the amount of spray drift
that might be blown away from the intended spray area.
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| Most farmers are very conscious of the environment around
their farm. They enjoy farming and seek to preserve their farming
heritage for future generations. |
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This
publication is available in alternative media on request.
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