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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


Production Agriculture and the Environment in Pennsylvania

by Melanie Barkley
Bedford County Extension Educator

 

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.

 

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.

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.

 

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.

 

Farmers often spread lime in the fall to give the soil time to adjust the pH levels for spring planting and the growing season.

 

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.

 

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.

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.

 

These calves are drinking from a spring development that collects water from wet areas to prevent soil damage during wet periods of the year.

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.

Contour strips look like stripes across the landscape, but are very effective for preventing soil erosion.

  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.


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.

 

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.

 

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.

 

Most farmers are very conscious of the environment around their farm. They enjoy farming and seek to preserve their farming heritage for future generations.

 

This publication is available in alternative media on request.

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This page last updated Monday, June 12, 2006 9:34

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