Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Crops (2)
- Fertilization (2)
- Ash (1)
- Attenuation (1)
- Bioassay (1)
-
- Corn (1)
- DOP (1)
- Deficiency (1)
- Diisononylphthalate (1)
- Dioctylphthalate (1)
- Ecosystems (1)
- Embryo-larval tests (1)
- Fertilizer (1)
- Foliar fertilization (1)
- Forest fertilization (1)
- Furnace (1)
- Intensity (1)
- Kentucky (1)
- Microorganisms (1)
- Nitrate nitrogen flux (1)
- Nutrient cycling (1)
- Ozone (1)
- PCBs (1)
- Polychlorinated biphenyls (1)
- Polydimethylsiloxanes (1)
- Soil (1)
- Soil amendment (1)
- Soybeans (1)
- Teratogenesis (1)
- Ultraviolet Radiation (1)
- Publication
Articles 1 - 6 of 6
Full-Text Articles in Life Sciences
Effects Of Polychlorinated Biphenyl Compounds And Proposed Pcb-Replacement Products On Embryo-Larval Stages Of Fish And Amphibians, Wesley J. Birge, Jeffrey A. Black, Albert G. Westerman
Effects Of Polychlorinated Biphenyl Compounds And Proposed Pcb-Replacement Products On Embryo-Larval Stages Of Fish And Amphibians, Wesley J. Birge, Jeffrey A. Black, Albert G. Westerman
KWRRI Research Reports
Static renewal bioassays were performed with four polychlorinated biphenyls, including Capacitor 21 and Aroclors 1016, 1242, and 1254. Each compound was used to treat embryo-larval stages of the rainbow trout (Salmo gairdneri), channel catfish (Ictalurus punctatus), goldfish (Carassius auratus), redear sunfish (Lepomis microlophus), leopard frog (Rana pipiens), Fowler's toad (Bufo fowleri), and American toad (Bufo americanus). Developmental stages of the trout were the most sensitive, with LC50 's at 4 days posthatching of 0.3, 1.0, 1.1, and 1.6 μg/l for Aroclors 1254, 1242, 1016, and …
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
KWRRI Research Reports
This project was designed to determine the effects of nitrogen fertilization on the quality and quantity of streamflow eminating from an eastern hardwood forest watershed. A 40.67 ha watershed, located in mountainous eastern Kentucky, was aerially fertilized in late April 1975. The forest stand was principally oak, hickory, and yellow poplar, 50 - 55 years of age and in a relatively undisturbed condition. A helicopter applied anunonium nitrate at a rate of 504 kg/ha. Because a large part of applied nitrogen fertilizer ends up in the highly mobile nitrate nitrogen.form, this is the principal ion monitored in this study. No …
Zinc Fertilization Of Corn In Kentucky, W. W. Frye, H. F. Miller, Lloyd W. Murdock, D. E. Peaslee
Zinc Fertilization Of Corn In Kentucky, W. W. Frye, H. F. Miller, Lloyd W. Murdock, D. E. Peaslee
Agronomy Notes
Of the agronomic crops, corn is especially sensitive to zinc deficiency. The major symptom of zinc deficiency in corn is broad white stripes in the leaves at or near the growing point in the early growth stages of the plant. It has been referred to as "white bud" disease because of the characteristic whitish area on one or both sides of the midrib near the base of new leaves. It can be seen as a new leaf unfolds from the whorl. Growth is stunted resulting in shorter than normal internodes. The pith of the stalk may become darkened at the …
Response Of Different Crops To Various Rates Of Furnace Ash Applied As A Soil Amendment, Lloyd W. Murdock, George Everette
Response Of Different Crops To Various Rates Of Furnace Ash Applied As A Soil Amendment, Lloyd W. Murdock, George Everette
Agronomy Notes
Furnace ash from coal fired electrical generating steam plants has increased greatly in the last decade with the increased demand for electricity and increased restrictions on air pollution. The large volumes of ash are presenting disposal and containment problems for management of electrical generating plants. Property adjacent to the generating plants has been exposed to fly ash settling from the smoke stacks and ash over flowing from holding structures. The effects of the material on the land and its production are unknown and concern property owners.
Foliar Fertilization Of Soybeans - 1977, Lloyd W. Murdock, Preeda Boon-Long, Dennis B. Egli, Kenneth L. Wells
Foliar Fertilization Of Soybeans - 1977, Lloyd W. Murdock, Preeda Boon-Long, Dennis B. Egli, Kenneth L. Wells
Agronomy Notes
Field investigations on the effect of foliar fertilization were continued on soybeans during 1977. Results from our 1976 studies have previously been published.
In 1976 we tested a material produced by TVA. We used the same TVA-material in 1977 and in addition, included a commercially available product (Foliantm, manufactured by Allied Chemical Corporation).
Studies On The Role Of Solar Ultraviolet Radiation In "Natural" Water Purification By Aquatic Ecosystems, John Calkins, Jeanne A. Barcelo, Perry Grigsby, Stephen Martin
Studies On The Role Of Solar Ultraviolet Radiation In "Natural" Water Purification By Aquatic Ecosystems, John Calkins, Jeanne A. Barcelo, Perry Grigsby, Stephen Martin
KWRRI Research Reports
The possibility that pollution might deplete the stratospheric ozone layer and intensify solar UV at the earth's surface focuses attention on the role of solar UV in the various ecosystems at the earth's surface. Previous studies suggested that solar UV might contribute to bacterial die off in wastewater and the studies reported here were directed toward elucidating the action of solar UV in "natural" waters.
It has been assumed that solar UV action on aquatic ecosystems can be evaluated (using proper models) on the basis of the following four independently measurable quantities: I) the intensity of solar UV at the …