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Penn State Cooperative Extension Publications

379 matches found for All Records in Extension Publications

Results 171 - 175 of 379

  1. Environmental Soil Issues: Land Application of Sewage Sludge in Pennsylvania - What is sewage sludge and what can be done with it? [pdf]Get Acrobat Reader
    Source: Department of Crop and Soil Sciences Publications

    "Before 1950, most communities in the United States discharged their wastewater, or sewage, into streams and rivers with little if any treatment. As urban populations increased, the natural ability of streams and rivers to handle the wasterwater was overwhelmed and caused water quality to deteriorate in many regions. In response to concerns about water quality degradation, thousands of communities throughout the United States constructed wastewater treatment systems during the 1950s and 1960s. This resulted in greatly improved stream and river water quality, but created another material to deal with: ."

  2. Environmental Soil Issues: Lead in Residential Soils: Sources, Testing, and Reducing Exposure [pdf]Get Acrobat Reader
    Source: Department of Crop and Soil Sciences Publications

    "Lead occurs naturally in soils, typically at concentrations that range from 10 to 50 mg/kg (milligrams of lead per kilogram of soil, equivalent to parts of lead per million parts of soil, or ppm). Because of the widespread use of leaded paint before the mid-1970s and leaded gasoline before the mid-1980s, as well as contamination from various industrial sources, urban soils often have lead concentrations much greater than normal background levels. These concentrations frequently range from 150 mg/kg to as high as 10,000 mg/kg at the base of a home painted with lead-based paint. Lead does not biodegrade, or disappear over time, but remains in soils for thousands of years."

  3. Environmental Standards of Production for Larger Pork Producers in Pennsylvania [pdf]Get Acrobat Reader
    Source: Penn State - Dairy and Animal Science Publications

    "Pork production facilities have increased in size in recent years, and large operations now account for the majority of the pigs raised in the United States. This 28-page manual provides planning agencies, township supervisors, regulatory agencies, and hog farmers with a tool to gauge plans for developing a new swine farm or improving an existing site."

  4. Erosion Control and Conservation Plantings on Noncropland [pdf]Get Acrobat Reader
    Source: Department of Crop and Soil Sciences Publications

    "This publication contains suggestions for establishing a vegetative cover to control soil erosion and runoff from lands wholly or partially denuded of cover. Building construction, solid waste disposal, strip mining, road building, and construction of dams, waterways, and diversion terraces are some of our activities that can cause land to be barren or inadequately covered by vegetation."

  5. Estrous synchronization programs for the dairy herd [pdf]Get Acrobat Reader
    Source: Penn State - Dairy and Animal Science Publications

    "The major factor limiting optimumreproductive performance on many farms is failureto detect estrus in a timely and accurate manner.Several prostaglandin (PG) products are availablefor use in synchronizing estrus in heifers andlactating dairy cattle. These products wereoriginally used to treat individual cows that hadnot exhibited heat by the time of desired firstservice. Several controlled or programmedbreeding programs have been developed forsynchronizing groups of lactating cattle.PG to all open cows within a breeding groupwithout palpation. The potential advantages ofcontrolled breeding are listed below.Potential advantages ofcontrolled breeding1. Improve the efficiency of heat detection.2. Achieve more timely first service. "

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