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Articles 2491 - 2520 of 2651

Full-Text Articles in Other Environmental Sciences

Wbecon- An Interactive Computer Model For The Economic Evaluation Of Field Windbreaks, James R. Brandle Jan 1993

Wbecon- An Interactive Computer Model For The Economic Evaluation Of Field Windbreaks, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Research Of The Nebraska Agroforestry Team, James R. Brandle Jan 1993

Research Of The Nebraska Agroforestry Team, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


An Improved Goniometer System For Calibrating Field Reference-Reflectance Panels, Elizabeth A. Walter-Shea, Cynthia J. Hays, Mark A. Mesarch Jan 1993

An Improved Goniometer System For Calibrating Field Reference-Reflectance Panels, Elizabeth A. Walter-Shea, Cynthia J. Hays, Mark A. Mesarch

School of Natural Resources: Faculty Publications

No abstract provided.


Photosynthesis And Stomatal Conductance Related To Reflectance On The Canopy Scale, S. B. Verma Jan 1993

Photosynthesis And Stomatal Conductance Related To Reflectance On The Canopy Scale, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


Eddy Correlation Measurement Of Co2 Flux Using A Closed-Path Sensor: Theory And Field Tests Against An Open-Path Sensor, A. E. Suyker, S. B. Verma Jan 1993

Eddy Correlation Measurement Of Co2 Flux Using A Closed-Path Sensor: Theory And Field Tests Against An Open-Path Sensor, A. E. Suyker, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


Vertebrates For Biological Control Of Insects In Agroforestry Systems, James R. Brandle Jan 1993

Vertebrates For Biological Control Of Insects In Agroforestry Systems, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


The Influence Of Alfalfa Root Structure On Plains Pocket Gopher Damage And Behavior, Bruce A. Jasch Dec 1992

The Influence Of Alfalfa Root Structure On Plains Pocket Gopher Damage And Behavior, Bruce A. Jasch

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Logistic Regression Models Of Habitat Use By Three Cyprinids In The Platte River, Nebraska, Shyi-Liang Yu May 1992

Logistic Regression Models Of Habitat Use By Three Cyprinids In The Platte River, Nebraska, Shyi-Liang Yu

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Nonfederal Automated Weather Stations And Networks In The United States And Canada: A Preliminary Survey*, Steven J. Meyer, Kenneth G. Hubbard Jan 1992

Nonfederal Automated Weather Stations And Networks In The United States And Canada: A Preliminary Survey*, Steven J. Meyer, Kenneth G. Hubbard

School of Natural Resources: Faculty Publications

Not all weather data are collected by federal agencies. Fueled by the need for more specific meteorological data in real or near-real-time, the number of automated weather stations (AWSs) and AWS networks has expanded to the state and private sector over the past decade. This study employed a survey to determine the spatial extent and disposition of these nonfederal AWSs and AWS networks in the United States and Canada, the type of measurements taken, the operating procedures (i.e., maintenance and data-retrieval techniques), and the uses of the data (e.g., research, public service, agency needs). The rapid growth and expansion in …


Opportunities To Increase Tree Planting In Shelterbelts And The Potential Impacts On Carbon Storage And Conservation, James R. Brandle Jan 1992

Opportunities To Increase Tree Planting In Shelterbelts And The Potential Impacts On Carbon Storage And Conservation, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Why Can The Weighting Parameter Of The Muskingum Channel Routing Method Be Negative?, Jozsef Szilagyi Jan 1992

Why Can The Weighting Parameter Of The Muskingum Channel Routing Method Be Negative?, Jozsef Szilagyi

School of Natural Resources: Faculty Publications

No abstract provided.


Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown Jan 1992

Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown

School of Natural Resources: Faculty Publications

Nestling Cliff Swallows (Hirundo pyrrhonota) in southwestern Nebraska that were relatively heavily parasitized by hematophagous fleas (Ceratophyllus celsus) and swallow bugs (Oeciacus vicarius) dispersed to nonnatal colonies to breed the subsequent year, whereas nestlings that were relatively lightly parasitized returned to their natal colony to breed. There were no significant differences between dispersers and nondispersers in natal clutch size, natal brood size, relative hatching date, natal body mass, natal nest's distance from the colony's center, and natal nest's age. There were no sex differences in dispersal tendencies. Dispersing birds tended to move to smaller colonies …


Ecological Aspects Of Burrowing Owl Nesting Strategies In The Nebraska Panhandle, Martha J. Desmond Dec 1991

Ecological Aspects Of Burrowing Owl Nesting Strategies In The Nebraska Panhandle, Martha J. Desmond

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Bird Response To Monofilament Lines At Backyard Feeders, Kimberly K. Kessler Dec 1991

Bird Response To Monofilament Lines At Backyard Feeders, Kimberly K. Kessler

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Biology And Ecology Of Dioryctria Ponderosae Dyar And Dioryctria Tumicolella Mutuura, Munroe And Ross, Mark A. Brohman Dec 1991

Biology And Ecology Of Dioryctria Ponderosae Dyar And Dioryctria Tumicolella Mutuura, Munroe And Ross, Mark A. Brohman

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Biology And Ecology Of Dioryctria Ponderosae Dyar And Dioryctria Tumicolella Mutuura, Munroe And Ross, Mark A. Brohman Dec 1991

Biology And Ecology Of Dioryctria Ponderosae Dyar And Dioryctria Tumicolella Mutuura, Munroe And Ross, Mark A. Brohman

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Effects Of The Conservation Reserve Program On Selected Wildlife Populations In Southeast Nebraska, Justin W. King May 1991

Effects Of The Conservation Reserve Program On Selected Wildlife Populations In Southeast Nebraska, Justin W. King

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Wbecon: A Windbreak Evaluation Model 1, James R. Brandle Jan 1991

Wbecon: A Windbreak Evaluation Model 1, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Estimation Of Shortwave Hemispherical Reflectance (Albedo) From Bidirectionally Reflected Radiance Data, Elizabeth A. Walter-Shea, Blaine L. Blad Jan 1991

Estimation Of Shortwave Hemispherical Reflectance (Albedo) From Bidirectionally Reflected Radiance Data, Elizabeth A. Walter-Shea, Blaine L. Blad

School of Natural Resources: Faculty Publications

No abstract provided.


Leaf Reflectance And Transmittance In Soybean And Corn, Elizabeth A. Walter-Shea, Blaine Blad Jan 1991

Leaf Reflectance And Transmittance In Soybean And Corn, Elizabeth A. Walter-Shea, Blaine Blad

School of Natural Resources: Faculty Publications

No abstract provided.


Predicting Canopy Light-Use Efficiency From Leaf Characteristics, T. J. Arkebauer Jan 1991

Predicting Canopy Light-Use Efficiency From Leaf Characteristics, T. J. Arkebauer

School of Natural Resources: Faculty Publications

No abstract provided.


Modeling Canopy Stomatal Conductance In A Temperate Grassland Ecosystem, Joon Kim, Shashi B. Verma Jan 1991

Modeling Canopy Stomatal Conductance In A Temperate Grassland Ecosystem, Joon Kim, Shashi B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


Modeling Canopy Photosynthesis: Scaling Up From A Leaf To Canopy In A Temperate Grassland Ecosystem, S. B. Verma Jan 1991

Modeling Canopy Photosynthesis: Scaling Up From A Leaf To Canopy In A Temperate Grassland Ecosystem, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


Photoperiod Control Of Poplar Bark Storage Protein Accumulation, Gary D. Coleman, Tony H.H. Chen, Stephen G. Ernst, Leslie Fuchigami Jan 1991

Photoperiod Control Of Poplar Bark Storage Protein Accumulation, Gary D. Coleman, Tony H.H. Chen, Stephen G. Ernst, Leslie Fuchigami

School of Natural Resources: Faculty Publications

Bark storage proteins (BSPs) accumulate in the inner bark parenchyma of many woody plants during autumn and winter. We investigated the effect of a short-day (SD) photoperiod on the accumulation of the 32-kilodalton bark storage protein of poplar (Populus deltoides Bart. ex Marsh.) under controlled environmental and natural growing conditions. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and protein gel blot analysis revealed that 10 days of SD exposure (8 hours of light) resulted in a 20% increase in the relative abundance of the 32-kilodalton bark storage protein of poplar. After 17 days of SD exposure, the 32-kilodalton bark storage protein …


Slope Effects On Shortwave Radiation Components And Net Radiation: Interim Report For Period April 1, 1991- December 31, 1991, E. A. Walter-Shea, B. L. Blad, C. J. Hays, M. A. Mesarch Jan 1991

Slope Effects On Shortwave Radiation Components And Net Radiation: Interim Report For Period April 1, 1991- December 31, 1991, E. A. Walter-Shea, B. L. Blad, C. J. Hays, M. A. Mesarch

School of Natural Resources: Documents and Reviews

No abstract provided.


Potential Effects Of Climate Change On Milk Production And Conception Rate In Dairy Cattle In The United States And Western Europe, Peggy Lea Klinedinst Jan 1991

Potential Effects Of Climate Change On Milk Production And Conception Rate In Dairy Cattle In The United States And Western Europe, Peggy Lea Klinedinst

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


A Report On Black-Tailed Prairie Dogs In Nebraska, Their Biology, Behavior, Ecology, Management, And Responses To A Visual Barrier Fence, Nancy S. Foster Dec 1990

A Report On Black-Tailed Prairie Dogs In Nebraska, Their Biology, Behavior, Ecology, Management, And Responses To A Visual Barrier Fence, Nancy S. Foster

School of Natural Resources: Dissertations, Theses, and Student Research

I examined the effects of a visual barrier fence, which had a see-through visibility of 600/0, on the foraging, vigilance, and aggressive behaviors of adult female black-tailed prairie dogs from June through August 1990 in central Nebraska. I also examined changes in their home ranges and use of an area in response to this fence. Prairie dogs prefer an open view of their surroundings. Therefore, I expected animals near a visual barrier to spend more time in vigilance and aggression, and less time foraging. Adult female prairie dogs exposed to the visual barrier devoted more time to foraging and less …


The Pacific/ North American Teleconnection Pattern And United States Climate. Part I: Regional Temperature And Precipitation Associations, Daniel J. Leathers, Brent Yarnal, Michael A. Palecki Nov 1990

The Pacific/ North American Teleconnection Pattern And United States Climate. Part I: Regional Temperature And Precipitation Associations, Daniel J. Leathers, Brent Yarnal, Michael A. Palecki

School of Natural Resources: Faculty Publications

The Pacific/ North American (PNA) teleconnection index, a measure of the strength and phase of the PNA teleconnection pattern, is related to the variations of the surface climate of the United States from 1947 through 1982 for the autumn, winter, and spring months when the PNA is a main mode of Northern Hemisphere mid-tropospheric variability. The results demonstrate that the PNA index is highly correlated with both regional temperature and precipitation. The strongest, most extensive correlations between the index and temperature are observed in winter, but large areas of the country show important associations during the spring and autumn as …


Interactions Between Plains Pocket Gophers And Two Varieties Of Dryland Alfalfa, James C. Luchsinger May 1990

Interactions Between Plains Pocket Gophers And Two Varieties Of Dryland Alfalfa, James C. Luchsinger

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Evaluation Of Monofilament Lines To Prevent Damage By Birds, Danilo A. Aguero May 1990

Evaluation Of Monofilament Lines To Prevent Damage By Birds, Danilo A. Aguero

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.