Other Environmental Sciences Commons^™

Plant And Air Temperatures In Differentially-Irrigated Corn, B. L. Blad

School of Natural Resources: Faculty Publications

No abstract provided.

Mass And Energy Exchanges Of A Soybean Canopy Under Various Environmental Regimes, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Limitations In The Use Of Leaf Dry Weight And Leaf Number For Predicting Leaf Area Of Soybeans, S.N. Ogbuehi, J.R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Reflectorized Soybean Canopy In Relation To Transpiration And Herbicide Phytotoxicity, S.N. Ogbuehi, J.R.C. Leavitt, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Regional Tectonics And Seismicity Of Eastern Nebraska, Annual Report July 1980 - June 1981, R. R. Burchett

School of Natural Resources: Faculty Publications

This annual report presents and interprets the information obtained by the Conservation and Survey Division (Nebraska Geological Survey) during contract year July 1, 1980, to June 30, 1981, under contract NRC-04-76-3lS with the U. S. Nuclear Regulatory Commission. The information pertains to the geology, structure, tectonics, and seismicity of eastern Nebraska with emphasis on central Otoe County. Some of the information presented here results from a combination of studies begun in earlier years but the greater part results from studies begun during the contract year.

The scope of the studies is summarized as follows:

1. Rock outcrops in Otoe County …

An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey

School of Natural Resources: Faculty Publications

A research effort was initiated in 1976 to develop an objective lake-effect snowfall forecast model for each of the Great Lakes. It is the purpose of this paper to present the development and evaluation of the forecast method which was created for the Lake Ontario induced snowfall systems. All Lake Ontario lake-effect days were identified for a 10-yead period prior to the 1976 snowfall season. Upper air surface observations were combined with overlake data for these lake-effect periods. The dominant predictors were derived through the diagnostic ability of stepwise multiple discriminant analysis. The final product of this research effort was …

Lake Erie Induced Mesosystems- An Operational Forecast Model, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

All Lake Erie lake-effect days for a 10-year period prior to the 1976-77 snowfall season were utilized in the development of an operational lake-effect snowfall forecast model. Upper air and surface observation were combined with overlake data and analyzed, using stepwise multiple-discriminant analysis. A nine-predictor mesoscale forecast model resulted from this statistical test and its performance was evaluated during the 1976-77 and 1977-78 snowfall seasons. The results of this evaluation indicate that it is possible to predict six intensities of the Lake Erie lake-effect snowstorm using this mesoscale model.

Aerial And Crop Resistances Affecting Energy Transport, S. B. Verma, B. J. Barfield

School of Natural Resources: Faculty Publications

No abstract provided.

Turbulence Under Conditions Of Sensible Heat Advection, R. P. Motha, S. B. Verma, N. J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.

An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey

School of Natural Resources: Faculty Publications

A research effort was initiated in 1976 to develop an objective lake-effect snowfall forecast model for each of the Great Lakes. It is the purpose of this paper to present the development and evaluation of the forecast method which was created for the Lake Ontario induced snowfall systems. All Lake Ontario lake-effect days were identified for a 10-year period prior to the 1976 snowfall season. Upper air and surface observations were combined with overlake data for these lake-effect periods. The dominant predictors were derived through the diagnostic ability of stepwise multiple discriminant analysis. The final product of this research effort …

The States And Natural Hazards, The Council Of State Governments, Robert Kuzelka

School of Natural Resources: Faculty Publications

No abstract provided.

Regional Tectonics And Seismicity Of Eastern Nebraska, R. R. Burchett

School of Natural Resources: Faculty Publications

This annual report presents and interprets the information obtained by the Conservation and Survey Division (Nebraska Geological Survey) during contract year July 1, 1979, to June 30, 1980, under contract NRC-04-76-3l5 with the U. S. Nuclear Regulatory Commission. The information pertains to the geology, structure, tectonics, and seismicity of eastern Nebraska with emphasis on the vicinity south of Omaha, Nebraska. Some of the information presented here results from a combination of studies begun in earlier years but the greater part results from studies begun during the contract year.

The scope of the studies is summarized as follows:

1. Rock outcrops …

Exchange Coefficients Under Sensible Heat Advection Determined By Eddy Correlation, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Local And Regional Components Of Sensible Heat Advection, Thomas W. Brakke, Shashi B. Verma, Norman J. Rosenberg

School of Natural Resources: Faculty Publications

Detailed knowledge of the advection of sensible heat is necessary to understand the energy balance of the evaporating surface in many parts of the world. Sensible hear advection can result from regional and/or local sources. The local and regional components of sensible heat advection (Aloc and Areg, respectively) are identified and their magnitudes in a semi-arid to sub-humid zone are established in the work reported here. Measurements of dry- and wet-bulb air temperature, wind speed and net radiation were made above an irrigated alfalfa field with relatively dry surrounding upwind at Mead, NE. A modified Bowen ratio-energy balance method which …

Shelter Effects On Growth And Yield Of Corn - Nebraska, U.S.A., James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Turbulent Exchange Coefficients For Sensible Heat And Water Vapor Under Advective Conditions, Shashi Verma, Norman J. Rosenberg, Blaine L. Blad

School of Natural Resources: Faculty Publications

Results are presented of micrometeorological measurements made over alfalfa and soybeans under conditions of sensible heat advection at Mead, Neb. The sensible heat advection phenomenon reported here is of a regional rather than a local nature. The exchange coefficient for sensible heat (Kh) is found to be generally greater than the exchange coefficient for water vapor (Kw). This result contradicts the usaul assumption of equality of Kh and Kw under nonadvection (lapse or unstable) conditions when the net transfer of both sensible heat and water vapor are away from the earth's surface. Under advective conditions, however, heat and water vapor …

Extreme Evapotranspiration By Irrigated Alfalfa: A Consequence Of The 1976 Midwestern Drought, Norman J. Rosenberg, Shashi Verma

School of Natural Resources: Faculty Publications

The rate of evapotranspiration by irrigated alfalfa at Mead, NE (41°09'N; 96°30'W, elevation 354 m) reached record levels in 1976. Evapotranspiration was measured with precision weighing lysimeters in a field 1.9 ha in size. Evapotranspiration ranged during the growing season from 4.75 to 14.22 mm day^–1 and exceeded 10 mm day­^–1 on one-third of the days studied. On each day of study the ratio of latent heat flux density (LE) to the sum of the net radiation and soil heat flux densities (Rn+S) was such that LE/ (Rn+S) > 1, indicating the occurrence of significant sensible heat advection. On …

Daily Maximum And Minimum Temperature Forecasts And The Influence Of Snow Cover, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

Research into the relationship between snow cover and observed maximum and minimum temperatures is reviewed. An example of the importance of snow cover and forecasting max/min temperatures is presented for this past winter (1976-77). It is shown that there was a warm bias in the MOS temperature forecasts for the northern Great Plains following the receipt of a fresh cover of snowfall. it is proposed that snow cover be incorporated as a conditional predictor to be used only during specific synoptic conditions.

Reflectant Induced Modification Of Soybean Canopy Radiation Balance. V Longwave Radiation Balance, M. W. Baradas, B. L. Blad, N. J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.

A System And Program For Monitoring Co2 Concentration Gradient, And Flux In An Agricultural Region, N. J. Rosenberg, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Carbon Dioxide Concentration And Flux In A Large Agricultural Region Of The Great Plains Of North America, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Resistance-Energy Balance Method For Predicting Evapotranspiration: Determination Of Boundary Layer Resistance And Evaluation Of Error Effects, S. B. Verma, N. J. Rosenberg, B. L. Blad

School of Natural Resources: Faculty Publications

No abstract provided.

Vertical Profiles Of Carbon Dioxide Concentration In Stable Stratification, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.

Reflectant Induced Modification Of Soybean Canopy Radiation Balance. Iv. Leaf And Canopy Temperature, M. W. Baradas, B. L. Blad, N. J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.

The Prediction Of Lake Huron Lake-Effect Snowfall Systems, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

Data was collected during the 1971-72 snowfall season for the Lake Huron basin. The bulk aerodynamic approach, as formulated by Priestly, was utilized to estimate the daily average flux of heat and moisture over the lake. It was hypothesized that discriminant analysis could be employed to determine the threshold value (discriminant index) of the energy flux which is necessary for the occurrence of the lake-effect snowfall system. To determine the validity of this threshold value, the discriminant index was applied to a series of historical data. The results of this analysis indicated that the discriminant index could be utilized to …

Accuracy Of Lysimetric, Energy Balance, And Stability-Corrected Aerodynamic Methods Of Estimating Above-Canopy Flux Of Co2, S. B. Verma, N. J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.

Changes In Polysomes Of Black Locust Seedlings During Dehydration-Rehydration Cycles, James R. Brandle, P.D. Schnare, T.M. Hinckley, G.N. Brown

School of Natural Resources: Faculty Publications

No abstract provided.

Simultaneous Determination Of Short-Period Photosynthesis And Evapotranspiration (Horticulture And Forestry Progress Report No. 91), Norman J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.

Numerical Computer Perpheral Interactive Device With Manual Controls, James C. Fletcher, Arthur I. Zygielbaum, Stanley S. Brokl

School of Natural Resources: Faculty Publications

A computer peripheral device is disclosed which in cludes a joystick whose displacement from a center position along two axes X and Y in either a plus (+) or a minus (-) direction is sensed. The displacement magnitude in either direction controls the rate of clock pulses provided by a variable frequency clock. The clock pulses from the two clocks are accumulated in two separate counters, whose contents are dis played. The contents of the counters are suppliable to a computer to update the contents of specific cells which define the position of a cursor on a display which is …

Concentration Of Co, In The Air Above A Sugar Beet Field, K.W. Brown, Norman J. Rosenberg

School of Natural Resources: Faculty Publications

The concentration of CO, in air sampled above a sugar beet crop was measured during July, August, and early September 1966 at Scottsbluff, Nebr. During July the mean daytime concentration decreased from 310 ppm to 283 ppm as the leaf area index increased from 0.8 to 4.0. Only small deviations from the mean daytime Concentration of 283 ppm occurred during the remainder of the season. The mean nocturnal concentration during this period was 320 ppm and was more variable than the daytime concentration. The daily amplitude of concentration averaged 70 ppm and was as great at times as 100 ppm. …