Open Access. Powered by Scholars. Published by Universities.®

Social and Behavioral Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Life Sciences

South Dakota State University

Series

Articles 31 - 60 of 67

Full-Text Articles in Social and Behavioral Sciences

List Of Economics Department Pamphlets, Penny Stover Jan 2015

List Of Economics Department Pamphlets, Penny Stover

Economics Pamphlet Series

No abstract provided.

Go to article

Estimation Of Crop Gross Primary Production (Gpp): Ii. Do Scaled Modis Vegetation Indices Improve Performance?, Qingyuan Zhang, Yen-Ben Cheng, Alexei I. Lyapustin, Yujie Wang, Xiaoyang Zhang, Andrew Suyker, Shashi Verma, Yanmin Shuai, Elizabeth M. Middleton Jan 2015

Estimation Of Crop Gross Primary Production (Gpp): Ii. Do Scaled Modis Vegetation Indices Improve Performance?, Qingyuan Zhang, Yen-Ben Cheng, Alexei I. Lyapustin, Yujie Wang, Xiaoyang Zhang, Andrew Suyker, Shashi Verma, Yanmin Shuai, Elizabeth M. Middleton

GSCE Faculty Publications

Satellite remote sensing estimates of gross primary production (GPP) have routinely been made using spectral vegetation indices (VIs) over the past two decades. The Normalized Difference Vegetation Index (NDVI), the Enhanced Vegetation Index (EVI), the green band Wide Dynamic Range Vegetation Index (WDRVIgreen), and the green band Chlorophyll Index (CIgreen) have been employed to estimate GPP under the assumption that GPP is proportional to the product of VI and photosynthetically active radiation (PAR) (where VI is one of four VIs: NDVI, EVI, WDRVIgreen, or CIgreen). However, the empirical regressions between VI*PAR and …

Go to article

An Economic Analysis Of High-Intensity, Short-Duration Grazing Systems In South Dakota And Nebraska, Larry Janssen, Bronc Mcmurtry, Matthew Stockton, Alexander Smart, Sharon A. Clay Jan 2015

An Economic Analysis Of High-Intensity, Short-Duration Grazing Systems In South Dakota And Nebraska, Larry Janssen, Bronc Mcmurtry, Matthew Stockton, Alexander Smart, Sharon A. Clay

Agronomy, Horticulture and Plant Science Faculty Publications

Four different grazing systems: two rotational systems, a continuous grazing system, and a modified high-intensity, short-duration (mob) system were evaluated from an economic return and risk perspective. Stocking rates and average daily gains (ADG) were obtained from 2011 – 2014 from university ranch experiments in northern Nebraska. Simulation models were used to examine net returns and risk in each system and rank systems according to risk preferences. A twice through rotational grazing system was most profitable. Mob grazing was the least preferred, although when risk aversion increased, it rose in preference. Mob grazing could be profitable if adjustments increased animal …

Go to article

Department Of Economics Publication List 2012, Penny Stover Apr 2013

Department Of Economics Publication List 2012, Penny Stover

Economics Pamphlet Series

This compilation lists works authored by Department of Economics faculty members and other staff working on projects funded through the Department of Economics. Publications resulting from their research and academic activities are indexed by author at the end of this pamphlet for easy access by the public. The articles were published between January 1, 2012 and December 31, 2012, except for those works printed in italics which have been accepted for publication but not actually printed as of December 31, 2012.

Go to article

The Global Availability Of Landsat 5 Tm And Landsat 7 Etm+ Land Surface Observations And Implications For Global 30m Landsat Data Product Generation, V. Kovalskyy, David P. Roy Mar 2013

The Global Availability Of Landsat 5 Tm And Landsat 7 Etm+ Land Surface Observations And Implications For Global 30m Landsat Data Product Generation, V. Kovalskyy, David P. Roy

GSCE Faculty Publications

With the advent of the free U.S. Landsat data policy it is now feasible to consider the generation of global coverage 30 m Landsat data sets with temporal reporting frequency similar to that provided by the monthly Web Enabled Landsat (WELD) products. A statistical Landsat metadata analysis is reported considering more than 800,000 Landsat 5 TM and Landsat 7 ETM + acquisitions obtained from the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center archive. The global monthly probabilities of acquiring a cloud-free land surface observation for December 1998 to November 2001 (2000 epoch) and from December 2008 …

Go to article

Prototype For Monitoring And Forecasting Fall Foliage Coloration In Real Time From Satellite Data, Xiaoyang Zhang, Mitchell D. Goldberg, Yunyue Yu Jun 2012

Prototype For Monitoring And Forecasting Fall Foliage Coloration In Real Time From Satellite Data, Xiaoyang Zhang, Mitchell D. Goldberg, Yunyue Yu

GSCE Faculty Publications

While determining vegetation phenology from the time series of historical satellite data has been widely investigated throughout the last decade, little effort has been devoted to real-time monitoring and short-term forecasting. The latter is more important for numerical weather modeling, ecosystem forecasting, forest and crop management, and health risk warning. In this study we developed a prototype approach for the real-time monitoring and short-term forecasting of fall foliage status (including low coloration, moderate coloration, near-peak coloration, peak coloration, and post-peak coloration) using temporal satellite observations. The algorithm combined the climatology of vegetation phenology and temporally available satellite observations to establish …

Go to article

Department Of Economics Publication List 2010, Penny Stover Jan 2011

Department Of Economics Publication List 2010, Penny Stover

Economics Pamphlet Series

This compilation lists published works authored by Department of Economics faculty members and other staff working on projects funded through the Department of Economics. Publications resulting from their research and academic activities are indexed by author at the end of the pamphlet for easy access by the public. The articles were published between January 1, 2010 and December 31, 2010.

Go to article

Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Change And Sensitivity To Snow And Interannual Albedo Variability, Christoper A. Barnes, David P. Roy Dec 2010

Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Change And Sensitivity To Snow And Interannual Albedo Variability, Christoper A. Barnes, David P. Roy

GSCE Faculty Publications

Satellite‐derived land cover land use (LCLU), snow and albedo data, and incoming surface solar radiation reanalysis data were used to study the impact of LCLU change from 1973 to 2000 on surface albedo and radiative forcing for 58 ecoregions covering 69% of the conterminous United States. A net positive surface radiative forcing (i.e., warming) of 0.029 Wm−2 due to LCLU albedo change from 1973 to 2000 was estimated. The forcings for individual ecoregions were similar in magnitude to current global forcing estimates, with the most negative forcing (as low as −0.367 Wm−2) due to the transition to forest and the …

Go to article

Department Of Economics Publication List 2010, Penny Stover Jan 2010

Department Of Economics Publication List 2010, Penny Stover

Economics Pamphlet Series

This compilation lists published works authored by Department of Economics faculty members and other staff working on projects funded through the Department of Economics. Publications resulting from their research and academic activities are indexed by author at the end of this pamphlet for easy access by the public. The articles were published between January 1, 2009 and December 31, 2009.

Go to article

Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Albedo Change, Christopher Barnes, David P. Roy May 2008

Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Albedo Change, Christopher Barnes, David P. Roy

GSCE Faculty Publications

Recently available satellite land cover land use (LCLU) and albedo data are used to study the impact of LCLU change from 1973 to 2000 on surface albedo and radiative forcing for 36 ecoregions covering 43% of the conterminous United States (CONUS). Moderate Resolution Imaging Spectroradiometer (MODIS) snowfree broadband albedo values are derived from Landsat LCLU classification maps located using a stratified random sampling methodology to estimate ecoregion estimates of LCLU induced albedo change and surface radiative forcing. The results illustrate that radiative forcing due to LCLU change may be disguised when spatially and temporally explicit data sets are not used. …

Go to article

Factors Affecting Road Mortality Of Whitetailed Deer In Eastern South Dakota, Troy W. Grovenburg, Jonathan A. Jenks, Robert W. Klaver, Kevin L. Monteith, Dwight H. Galster, Ron J. Schauer, Wilbert M. Morlock, Joshua A. Delger Apr 2008

Factors Affecting Road Mortality Of Whitetailed Deer In Eastern South Dakota, Troy W. Grovenburg, Jonathan A. Jenks, Robert W. Klaver, Kevin L. Monteith, Dwight H. Galster, Ron J. Schauer, Wilbert M. Morlock, Joshua A. Delger

Natural Resource Management Faculty Publications

White-tailed deer (Odocoileus virginianus) mortalities (n = 4,433) caused by collisions with automobiles during 2003 were modeled in 35 counties in eastern South Dakota. Seventeen independent variables and 5 independent variable interactions were evaluated to explain deer mortalities. A negative binomial regression model (Ln Y = 1.25 – 0.12 [percentage tree coverage] + 0.0002 [county area] + 5.39 [county hunter success rate] + 0.0023 [vehicle proxy 96–104 km/hr roads], model deviance = 33.43, χ2 = 27.53, df = 27) was chosen using a combination of a priori model selection and AICc. Management options include use of the model to predict …

Go to article

What Limits Fire? An Examination Of Driver's Of Burnt Area In Southern Africa, Sally Archibald, David P. Roy, Brian W. Van Wilgen, Robert J. Scholes Jan 2008

What Limits Fire? An Examination Of Driver's Of Burnt Area In Southern Africa, Sally Archibald, David P. Roy, Brian W. Van Wilgen, Robert J. Scholes

GSCE Faculty Publications

The factors controlling the extent of fire in Africa south of the equator were investigated using moderate resolution (500 m) satellite-derived burned area maps and spatial data on the environmental factors thought to affect burnt area. A random forest regression tree procedure was used to determine the relative importance of each factor in explaining the burned area fraction and to address hypotheses concerned with human and climatic influences on the drivers of burnt area. The model explained 68% of the variance in burnt area. Tree cover, rainfall in the previous 2 years, and rainfall seasonality were the most important predictors. …

Go to article

Prairie Wetlands And Climate Change - Droughts And Ducks On The Prairies, Glenn R. Guntenspergen, W.Carter Johnson, David E. Naugle Jan 2006

Prairie Wetlands And Climate Change - Droughts And Ducks On The Prairies, Glenn R. Guntenspergen, W.Carter Johnson, David E. Naugle

Natural Resource Management Faculty Publications

The Prairie Pothole Region (PPR) contains 5-8 million small wetlands and is one of the most ecologically valuable freshwater resources of the Nation. These wetlands provide abundant ecosystem services, including groundwater recharge, water for agriculture, water purification, and recreation. The PPR is best known as the “duck factory” of North America. By some estimates, this region produces over 50% of the ducks in North America.

Go to article

Fire-Induced Albedo Change And Its Radative Forcing At The Surface In Northern Austrailia, Y. Jin, David P. Roy Jul 2005

Fire-Induced Albedo Change And Its Radative Forcing At The Surface In Northern Austrailia, Y. Jin, David P. Roy

GSCE Faculty Publications

This paper investigates the impact of fire on surface albedo and the associated radiative forcing over 56% of continental Australia encompassing the fire-prone northern tropical savanna. Fire-affected areas and albedos are derived for the 2003 fire season using daily Moderate Resolution Imaging Spectroradiometer (MODIS) surface reflectance data. Near-infrared and total shortwave albedos are observed to generally decrease after fire occurrence. Regionally, the total shortwave albedo drops by an average of 0.024, with increasing reductions as the dry season progresses and larger reductions in grasslands than woody savannas. These fire-induced albedo changes exert a positive forcing at the surface that increases …

Go to article

Comparison Of 'Organic' And 'Conventional' Grains And Soybean Prices In The Northern Great Plains And Upper Midwest: 1995 Through 2003, Nicholas Streff, Thomas L. Dobbs Jun 2004

Comparison Of 'Organic' And 'Conventional' Grains And Soybean Prices In The Northern Great Plains And Upper Midwest: 1995 Through 2003, Nicholas Streff, Thomas L. Dobbs

Economics Pamphlet Series

Price premiums for organic crops drew the attention of an increasing number of farmers throughout the 1990s. Premiums contributed to the expansion of U.S. farmland managed under organic farming systems during that time period. Expansion of organic farming systems continued at least through 2001. According to the U.S. Department of Agriculture (USDA) Economic Research Service's most recent data on organic farming systems, U.S. farmers and ranchers added almost one million acres of certified organic farmland between 1997 and 2001, an increase of 74 percent. Over that same time frame, certified organic cropland increased by 53 percent). The USDA implemented national …

Go to article

Comparison Of Organic And Conventional Crop Prices: 1995 To 1997, Thomas L. Dobbs, Lisa M. Carr Apr 1998

Comparison Of Organic And Conventional Crop Prices: 1995 To 1997, Thomas L. Dobbs, Lisa M. Carr

Economics Pamphlet Series

Organic industry sales by United State (US) natural product distributors have been growing at more than 20 percent annually during the 1990s. Demand growth for certified organic agricultural commodities has been strong both in the us and abroad. For example, Japan's demand for organically grown us soybeans has been especially strong in recent years. This growth in demand, together with growing concerns about the profitability and ecological sustainability of more "conventional" farming systems in some areas, is causing new interest in organic agriculture. Therefore, as part of our sustainable agriculture research program in the Economics Department at South Dakota State …

Go to article

Changes In Eastern South Dakota Crops Patterns: 1950s To 1990s, Thomas L. Dobbs, Lisa M. Carr Dec 1997

Changes In Eastern South Dakota Crops Patterns: 1950s To 1990s, Thomas L. Dobbs, Lisa M. Carr

Economics Pamphlet Series

This report contains background data for a study on possible impacts of the 1996 Farm Bill ("Federal Agricultural Improvement and Reform Act of 1996") on crop system diversity. The study, being conducted by the Economics Department at South Dakota State University (SDSU), is focused on the 7-county area of eastern South Dakota shown in the map on the following page. This area constitutes a major portion of the Big Sioux River drainage area in South Dakota. The aquifer underlying the Big Sioux River in these counties provides drinking water for a significant portion of the State's population. Therefore, agricultural practices …

Go to article

Case Study Of The Profitability Of A South Dakota Farm Using The Integrated Farm Managment Program, Charles L. Prouty, Thomas L. Dobbs Jul 1996

Case Study Of The Profitability Of A South Dakota Farm Using The Integrated Farm Managment Program, Charles L. Prouty, Thomas L. Dobbs

Economics Pamphlet Series

This report is one of five covering case study farms in the east-central South Dakota portion of the Big Sioux Aquifer area. The other four reports are South Dakota State University Econ Pamphlets 95-1 through 95-4, published in September 1995. operators of each of the case study farms covered in the five reports were participating in some segment of the Federal farm program aimed specifically at improving the ecological sustainability of U.S. agriculture. The case farm featured in this report was participating in the Integrated Farm Management (IPM) program of the 1990 Farm Bill. Since the data collection and analyses …

Go to article

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 1 Summary, Lon D. Henning, Burton W. Pflueger, John H. Bischoff, Thomas L. Dobbs Sep 1995

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 1 Summary, Lon D. Henning, Burton W. Pflueger, John H. Bischoff, Thomas L. Dobbs

Economics Pamphlet Series

The overall goal of the SARE/Water Quality project was to determine whether economic incentives offered by recent environmental provisions of the Federal farm program are sufficient to induce Western Corn Belt/Northern Great Plains farmers in environmentally sensitive areas to adopt sustainable farming practices and systems. To attain this goal, four case farms were chosen to be involved in this study based on their size, soil types, cropping systems, topography, and management in the Big Sioux Aquifer study area.

Go to article

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 4 Summary, Lon D. Henning, Thomas L. Dobbs, John H. Bischoff, Burton W. Pflueger Sep 1995

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 4 Summary, Lon D. Henning, Thomas L. Dobbs, John H. Bischoff, Burton W. Pflueger

Economics Pamphlet Series

The overall goal of the SARE/Water Quality project was to determine whether economic incentives offered by recent environmental provisions of the Federal farm program are sufficient to induce Western Corn Belt/Northern Great Plains farmers in environmentally sensitive areas to adopt sustainable farming practices and systems. To attain this goal, four case farms were chosen to be involved in this study based on their size, soil types, cropping systems, topography, and management in the Big Sioux Aquifer study area. Case Farm No. 4 is located in Brookings County and followed a continuous corn rotation prior to enrollment in the Water Quality …

Go to article

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 2 Summary, Lon D. Henning, John H. Bischoff, Thomas L. Dobbs, Burton W. Pflueger Sep 1995

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 2 Summary, Lon D. Henning, John H. Bischoff, Thomas L. Dobbs, Burton W. Pflueger

Economics Pamphlet Series

The overall goal of the SARE/Water Quality project was to determine whether economic incentives offered by recent environmental provisions of Federal farm program are sufficient to induce Western Corn Belt/Northern Plains farmers in environmentally sensitive areas to adopt sustainable fa practices and systems. To attain this goal, four case farms were chosen involved in this study based on their size, soil types, cropping systems, topography, and management in the Big Sioux Aquifer study area. Case Farm No. 2 is located in Moody County and followed a corn-soybean oats rotation on the acres focused on in the analysis prior to enrollment …

Go to article

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 3 Summary, Lon D. Henning, Thomas L. Dobbs, John H. Bischoff, Burton W. Pflueger Sep 1995

Profitability And Nitrate Leaching Effects Of Possible Farming Practice And System Changes Over South Dakota's Big Sioux Aquifer: Case Farm No. 3 Summary, Lon D. Henning, Thomas L. Dobbs, John H. Bischoff, Burton W. Pflueger

Economics Pamphlet Series

The overall goal of the SARE/Water Quality project was to determine whether economic incentives offered by recent environmental provisions of the Federal farm program are sufficient to induce Western Corn Belt/Northern Great Plains farmers in environmentally sensitive areas to adopt sustainable farming practices and systems. To attain this goal, four case farms were chosen to be involved in this study based on their size, soil types, cropping systems, topography, and management in the Big Sioux Aquifer study area. Case Farm No.3 is located in Minnehaha County and has corn, soybeans, oats, alfalfa, and clover. It is a dry-land operation that …

Go to article

Publication List Economics Department: 1993 - 1994, Department Of Economics Sep 1994

Publication List Economics Department: 1993 - 1994, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during April 1993 - July 1994 by the faculty and graduate students in the Economics Department at South Dakota State University. The publications are arranged by series (Staff Paper, Research Paper, Economics Commentator, Experiment Station Bulletin, etc.). There is a subject matter index, author index and a Economics Faculty listing included also.

Go to article

Publication List Economics Department: 1992 - 1993, Department Of Economics Apr 1993

Publication List Economics Department: 1992 - 1993, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during January 1992 - March 1993 by the faculty and graduate students in the Economics Department at South Dakota state University. The publications are arranged by series (Staff Paper, Research Paper, Economics Commentator, Experiment Station Bulletin, etc.).

Go to article

Publication List Economics Department: September 1989 - December 1991, Department Of Economics Apr 1992

Publication List Economics Department: September 1989 - December 1991, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during September 1989 - December 1991 by the faculty and graduate students in the Economics Department at South Dakota State University. The publications are arranged by series (Staff Paper, Research Paper, Economics Commentator, Experiment Station Bulletin, etc.).

Go to article

Publication List Economics Department: 1984 - 1988, Department Of Economics Jan 1988

Publication List Economics Department: 1984 - 1988, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during 1984 - 1988 by the faculty and graduate students in the Economics Department at South Dakota State University in the course of their research, extension, and teaching duties. The publications are arranged by the basic areas of concentration in the department: agricultural marketing, farm and ranch management, energy and water resource development, and rural development and public affairs.

Go to article

Publication List Economics Department: 1984 - 1986, Department Of Economics Jan 1987

Publication List Economics Department: 1984 - 1986, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during 1984 - 1986 by the faculty and graduate students in the Economics Department at South Dakota State University in the course of their research, extension, and teaching duties. The publications are arranged by the basic areas of concentration in the department: agricultural marketing, farm and ranch management, energy and water resource development, and rural development and public affairs.

Go to article

Publication List Economics Department: January 1980 - May 1985, Department Of Economics Jan 1985

Publication List Economics Department: January 1980 - May 1985, Department Of Economics

Economics Pamphlet Series

The publications listed herein were prepared during January 1980 - May 1985 by the faculty and graduate students in the Economics Department at South Dakota State University in the course of their research, extension, and teaching duties. The publications are arranged by the basic areas of concentration in the department: agricultural marketing, farm and ranch management, energy and water resource development, and rural development and public affairs.

Go to article

Federal Public Land Laws And Policies Relating To Intensive Agriculture, Volume Vi. Working Paper: Probable Effects Of New Cropland On Local And Regional Economies In Western United States, Economics Department Apr 1969

Federal Public Land Laws And Policies Relating To Intensive Agriculture, Volume Vi. Working Paper: Probable Effects Of New Cropland On Local And Regional Economies In Western United States, Economics Department

Economics Research Reports

No abstract provided.

Go to article

Federal Public Land Laws And Policies Relating To Intensive Agriculture, Volume Iii. Working Paper: Economics Of Farm Size In Western United States, Economics Department Apr 1969

Federal Public Land Laws And Policies Relating To Intensive Agriculture, Volume Iii. Working Paper: Economics Of Farm Size In Western United States, Economics Department

Economics Research Reports

No abstract provided.

Go to article

First Prev Next Last