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

Life Sciences Commons

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

Articles 1 - 6 of 6

Full-Text Articles in Life Sciences

Effect Of Different Extrusion Processing Parameters On Physical Properties Of Soy White Flakes And High Protein Distillers Dried Grains-Based Extruded Aquafeeds, Sushil Kumar Singh, Kasiviswanathan Muthukumarappan Dec 2014

Effect Of Different Extrusion Processing Parameters On Physical Properties Of Soy White Flakes And High Protein Distillers Dried Grains-Based Extruded Aquafeeds, Sushil Kumar Singh, Kasiviswanathan Muthukumarappan

Agricultural and Biosystems Engineering Publications

Nutritionally balanced ingredient blends for catla (Catla catla), belonging to the family Cyprinidae, were extruded using single screw extruder. The extrusion was carried out at five levels of soy white flakes content (21%, 29%, 40%, 52%, and 59% db), five levels of moisture content (15, 19, 25, 31, and 35% db) and five levels of barrel temperature (100, 110, 125, 140, and 150 ºC) using three different die nozzles (having L/D ratios 3.33, 5.83, and 7.25). Blends with net protein content of 32.5% contains soy white flakes, along with high protein distillers dried grains (HP-DDG ...


Automated Crop Field Extraction From Multi-Temporal Web Enabled Landsat Data, Lin Yan Dr., David P. Roy Feb 2014

Automated Crop Field Extraction From Multi-Temporal Web Enabled Landsat Data, Lin Yan Dr., David P. Roy

GSCE Faculty Publications

An automated computational methodology to extract agricultural crop fields from 30 m Web Enabled Landsat data (WELD) time series is presented. The results for three 150 × 150 kmWELD tiles encompassing rectangular, circular (center-pivot irrigation) and irregularly shaped fields in Texas, California and South Dakota are presented and compared to independent United States Department of Agriculture (USDA) National Agricultural Statistics Service (NASS) cropland data layer (CDL) classifications. Coherent fields that are visually apparent were extracted with relatively limited apparent errors of omission or commission compared to the CDL classifications. This is due to several factors. First, the use ofmulti-temporal Landsat data ...


Benchmark Survey, Sdsu Extension Jan 2014

Benchmark Survey, Sdsu Extension

SDSU Extension Reports

In 2011, SDSU Extension faced significant state and federal budget cuts (FY2012), which meant the concept of a traditional Extension system would not be financially feasible. In response to these cuts, SDSU Extension implemented a new staffing model, reorganized into eight Regional Extension Centers and emphasized a web-based delivery system through www.iGrow.org. How did these changes impact SDSU Extension’s ability to support its land-grant mission to provide educational programs that strengthen agriculture and natural resources, families and communities? To find out, SDSU Extension contracted with a third-party marketing firm to interview 400 crop and livestock producers throughout ...


Wetland Issues Affecting Waterfowl Conservation In North America, Heath M. Hagy, Scott C. Yaich, John W. Simpson, Eduardo Carrera, David A. Haukos, W.Carter Johnson, Charles R. Loesch, Fritz A. Reid, Scott E. Stephens, Ralph W. Tiner, Brett A. Werner, Greg S. Yarris Jan 2014

Wetland Issues Affecting Waterfowl Conservation In North America, Heath M. Hagy, Scott C. Yaich, John W. Simpson, Eduardo Carrera, David A. Haukos, W.Carter Johnson, Charles R. Loesch, Fritz A. Reid, Scott E. Stephens, Ralph W. Tiner, Brett A. Werner, Greg S. Yarris

Natural Resource Management Faculty Publications

This paper summarises discussions by invited speakers during a special session at the 6th North American Duck Symposium on wetland issues that affect waterfowl, highlighting current ecosystem challenges and opportunities for the conservation of waterfowl in North America. Climate change, invasive species, U.S. agricultural policy (which can encourage wetland drainage and the expansion of row-crop agriculture into grasslands), cost and competition for water rights, and wetland management for non-waterfowl species were all considered to pose significant threats to waterfowl populations in the near future. Waterfowl populations were found to be faced with significant threats in several regions, including: the ...


The Journal Of Undergraduate Research: Volume 12 Jan 2014

The Journal Of Undergraduate Research: Volume 12

The Journal of Undergraduate Research

This is the complete issue of the South Dakota State University Journal of Undergraduate Research, Volume 12.


A Comparison Of Corn Yield Forecasting Models, Nicholas Jorgensen Jan 2014

A Comparison Of Corn Yield Forecasting Models, Nicholas Jorgensen

Electronic Theses and Dissertations

The purpose of this research is to compare and analyze several different yield forecasting methods. The study analyzes corn yields in Ohio and South Dakota for the years 1986 through 2012. A base model, with a trend and state dummy variable is developed. Two competing models, one with objective variables and one with subjective variables, are then developed as additions to the base model. The competing objective model is developed by adding accumulated growing degree days (GDD) and accumulated rainfall variables. The competing subjective model is developed by adding a USDA crop conditions index (CCI) variable. The models are estimated ...