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Penn State Cooperative Extension Publications

379 matches found for All Records in Extension Publications

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  1. Agronomy Facts 35: Some Facts About Soil Basics
    Source: Department of Crop and Soil Sciences Publications

    "The earth is covered by a thin layer of soil, composed of minerals, organic matter, and living organisms. Within this layer is a record of the area's geological and climactic history, as well as information about the suitability of future use of the soil. Soils affect many areas of our lives; we depend on the soil to grow our food and support the buildings we live and work in. Soils form an essential element in the ecosystem. Human activities that damage soils threaten to disrupt the delicate balance that sustains life. It is important to have a basic understanding of the formation and properties of soils to determine their future uses and to manage soils wisely."

  2. Agronomy Facts 36: Persistance of Herbicides in Soil [pdf]Get Acrobat Reader
    Source: Department of Crop and Soil Sciences Publications

    "Herbicides are applied to soil to manage weeds. While it is desirable for the chemicals to control weeds during the season of application, it is not desirable for them to persist and affect subsequent crop growth."

  3. Agronomy Facts 37: Adjuvants for Enhancing Herbicide Performance [pdf]Get Acrobat Reader
    Source: Department of Crop and Soil Sciences Publications

    "Adjuvants are commonly used in agriculture to improve the performance of pesticides. Broadly defined, "an adjuvant is an ingredient that aids or modifies the action of the principal active ingredient.""

  4. Agronomy Facts 38A: A nutrient management approach for Pennsylvania: Introduction to the concepts
    Source: Department of Crop and Soil Sciences Publications

    "Nutrient management has taken on new meaning in recent times. Soil fertility traditionally dealt with supplying and managing nutrients to meet crop production requirements. The predictable response of a crop to the application of a deficient nutrient has been the focus. Ways of farming to optimize agronomic production and economic returns to crop production were developed to take advantage of these expected crop responses. Changes in the supply of plant nutrients for this purpose have been dramatic since the end of World War II."

  5. Agronomy Facts 38B: A nutrient management approach for Pennsylvania: Plant nutrient stocks and flows
    Source: Department of Crop and Soil Sciences Publications

    "Almost all decision-making in agriculture, in the boardrooms of industry or on the tractor seats of farms, affects the distribution of materials such as crops and manure within farms, and the movement of materials such as feeds and farm products to and from farms. Most common farm materials contain important plant nutrients, such as nitrogen, phosphorus, and potassium, and are moved as part of the everyday activities of farming and agriculture. As a result, the many factors considered in each management decision affect plant nutrient distribution and have implications for nutrient management to meet the many expectations."

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