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Full-Text Articles in Physical Sciences and Mathematics
Use Of Fluorogypsum To Reduce Subsoil Acidity In A Fragipan Soil, Grant W. Thomas, Gerald R. Haszler
Use Of Fluorogypsum To Reduce Subsoil Acidity In A Fragipan Soil, Grant W. Thomas, Gerald R. Haszler
Soil Science News and Views
In western Kentucky, there are several million acres of fragipan soils which are characterized by both acid subsoils and fragipans which commence at depths of 20 to 30 inches below the soil surface. The combination of subsoil acidity and a fragipan with massive structure impedes root growth and water movement, diminishing, somewhat, the usefulness of the soils for crop production. Alfalfa, a crop which is very sensitive to soil acidity and to poor drainage, was chosen as a test crop to measure the effects of adding fluorogypsum to Sadler silt loam, a soil representative of the fragipan soils found in …
Farm Nutrient Management, William O. Thom
Farm Nutrient Management, William O. Thom
Soil Science News and Views
Nutrient management is becoming a buzz word in today's vocabulary of crop and livestock production. In the past it was applied to efficient management of all nutrient sources used for crop production. More recently it is being used to account for all nutrients used for crop production that are brought onto the farm, removed from the farm in crop and animal products, and reallocated within the farm unit. Nitrogen, phosphorus, and potassium are the nutrients of concern with nitrogen and phosphorus being most important.
Fertilizer Use Changes In The U.S. And Kentucky, Monroe Rasnake, Dan Kirkland
Fertilizer Use Changes In The U.S. And Kentucky, Monroe Rasnake, Dan Kirkland
Soil Science News and Views
The use of inorganic fertilizers for crop production is perhaps the most successful educational program ever attempted by Land-Grant Colleges, the Tennessee Valley Authority and other agencies. Not many producers in the United States or the world will attempt to grow a crop without the use of fertilizers. In fact, some producers over fertilize and in recent years, the educational program has been aimed at teaching producers to limit fertilizer applications to what is actually needed based on soil tests and cropping conditions.
Use Of Magnesium (Mg) For Crop Production In Kentucky, John H. Grove
Use Of Magnesium (Mg) For Crop Production In Kentucky, John H. Grove
Soil Science News and Views
Magnesium (Mg) is an important element in the nutrition of plants and animals, although it has long been considered a "secondary" nutrient for plants. Nitrogen (N), phosphorus (P), and potassium (K) are "primary'' nutrients and are usually given the greatest consideration in crop fertility programs. However, as yield levels have risen, more attention has been directed towards Mg and other nutrient elements. Concern about hypomagnesemia (grass tetany) in ruminants (cattle, sheep) has led to particular concern about soil and plant Mg levels.
Water Relationships Of Kentucky Soils, Ronald E. Phillips, Grant W. Thomas
Water Relationships Of Kentucky Soils, Ronald E. Phillips, Grant W. Thomas
Soil Science News and Views
Plant water stress is the most limiting single factor in crop production in Kentucky. It almost always occurs sometime during July and/or August even though it's variability makes it hard to predict. Even though the 1979 growing season was an exception to this generalization the 1980 growing season was a vivid reminder of this fact especially in Western Kentucky.