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5,884 full-text articles. Page 144 of 144.

Hydrologic Modeling Of Runoff From A Livestock Manure Windrow Composting Site With A Fly Ash Pad Surface And Vegetative Filter Strip Buffers, David F. Webber, Steven K. Mickelson, Larry W. Wulf, Thomas L. Richard, Heekwon Ahn 2010 Iowa State University

Hydrologic Modeling Of Runoff From A Livestock Manure Windrow Composting Site With A Fly Ash Pad Surface And Vegetative Filter Strip Buffers, David F. Webber, Steven K. Mickelson, Larry W. Wulf, Thomas L. Richard, Heekwon Ahn

Agricultural and Biosystems Engineering Publications

Windrow composting of livestock manure materials provides a strategy for converting organic wastes into a recyclable soil fertility product that is less hazardous to the environment. Although outdoor windrow composting can produce runoff that is detrimental to surface water quality, vegetative filter strip (VFS) buffers were reported to significantly reduce runoff and contaminants from a windrow composting research site. To estimate the efficacy of VFS buffers and other best management practices on runoff from future windrow composting facilities, a computer hydrologic model may provide a valuable tool for predicting runoff losses from these proposed sites. This research evaluated a windrow ...


Use Of The Soil-Plant-Air-Water Model To Predict Hydraulic Performance Of Vegetative Treatment Areas Controlling Open Lot Runoff, Daniel S. Andersen, Robert T. Burns, Lara B. Moody, Matthew J. Helmers, Robert Horton Jr., Carl H. Pederson 2010 Iowa State University

Use Of The Soil-Plant-Air-Water Model To Predict Hydraulic Performance Of Vegetative Treatment Areas Controlling Open Lot Runoff, Daniel S. Andersen, Robert T. Burns, Lara B. Moody, Matthew J. Helmers, Robert Horton Jr., Carl H. Pederson

Agricultural and Biosystems Engineering Publications

Alternative treatment systems to control runoff from open beef feedlots may enhance environmental security and protect water quality. Several Midwestern states have issued National Pollution Discharge Elimination System permits allowing beef feedlots to use vegetative treatment systems (VTSs) to control and treat feedlot runoff. Monitoring VTSs has provided data to validate performance modeling strategies. The objective of this study was to evaluate the ability of the Soil-Plant-Air-Water (SPAW) model to predict the hydraulic performance of vegetative treatment areas (VTAs). Two approaches, one using the field module and the other the pond module of the SPAW model, were investigated. The model ...


Prediction Of Indoor Climate And Long-Term Air Quality Using The Bta-Aqp Model: Part Ii. Overall Model Evaluation And Application, Gang Sun, Steven J. Hoff 2010 Iowa State University

Prediction Of Indoor Climate And Long-Term Air Quality Using The Bta-Aqp Model: Part Ii. Overall Model Evaluation And Application, Gang Sun, Steven J. Hoff

Agricultural and Biosystems Engineering Publications

The objective of this research was to develop a building thermal analysis and air quality predictive (BTA-AQP) model to predict indoor climate and long-term air quality (NH3, H2S, and CO2 concentrations and emissions) for swine deep-pit buildings. This article presents part II of this research, in which the performance of the BTA-AQP model is evaluated using typical meteorological year (TMY3) data in predicting long-term air quality trends. The good model performance ratings (MAE/SD < 0.5, CRM ˜ 0; IoA ˜ 1; and NSEF > 0.5 for all the predicted parameters) and the graphical presentations reveal that the BTA-AQP model was able to accurately forecast indoor climate and gas concentrations ...


Detection And Identification Of Microorganisms In Mixed Cultures By Nanoparticle-Induced Nanospr Enhanced Ftir Spectroscopy And Chemometrics, Qi Wang, Nan Xiao, Chenxu Yu 2010 Iowa State University

Detection And Identification Of Microorganisms In Mixed Cultures By Nanoparticle-Induced Nanospr Enhanced Ftir Spectroscopy And Chemometrics, Qi Wang, Nan Xiao, Chenxu Yu

Agricultural and Biosystems Engineering Publications

Routine identification of pathogenic microorganisms predominantly based on nutritional and biochemical tests is a time-consuming process, but delay may lead to fatal consequences at times. In this work, nanoparticle-induced nanoSPR enhanced IR spectroscopy was used in conjunction with a background elimination data processing algorithm to directly identify microorganisms in mixed cultures. It was demonstrated that the microbial composition of mixtures of different E. coli strains could be accurately identified using our method, at a concentration level of 103 CFU mL-1. The procedure was also applied to determine the presence or absence of pathogenic microorganisms in a simple but real food ...


Real-Time Pressure And Flow Dynamics Due To Boom Section And Individual Nozzle Control On Agricultural Sprayers, Ajay Sharda, John P. Fulton, Timothy P. McDonald, Wesley C. Zech, Matthew J. Darr, Christian J. Brodbeck 2010 Auburn University

Real-Time Pressure And Flow Dynamics Due To Boom Section And Individual Nozzle Control On Agricultural Sprayers, Ajay Sharda, John P. Fulton, Timothy P. Mcdonald, Wesley C. Zech, Matthew J. Darr, Christian J. Brodbeck

Agricultural and Biosystems Engineering Publications

Most modern spray controllers when coupled with a differential global positioning system (DGPS) receiver can provide automatic section or swath (boom section or nozzle) control capabilities that minimize overlap and application into undesirable areas. This technology can improve application accuracy of pesticides and fertilizers, thereby reducing the number of inputs while promoting environmental stewardship. However, dynamic system response for sprayer boom operation, which includes cycling or using auto-swath technology, has not been investigated. Therefore, a study was conducted to develop a methodology and subsequently perform experiments to evaluate tip pressure and system flow variations on a typical agricultural sprayer equipped ...


Evaluation Of Spectral Pretreatments, Partial Least Squares, Least Squares Support Vector Machines And Locally Weighted Regression For Quantitative Spectroscopic Analysis Of Soils, Benoit Igne, James B. Reeves, Gregory McCarty, W. Dean Hively, Eric Lund, Charles R. Hurburgh Jr. 2010 Iowa State University

Evaluation Of Spectral Pretreatments, Partial Least Squares, Least Squares Support Vector Machines And Locally Weighted Regression For Quantitative Spectroscopic Analysis Of Soils, Benoit Igne, James B. Reeves, Gregory Mccarty, W. Dean Hively, Eric Lund, Charles R. Hurburgh Jr.

Agricultural and Biosystems Engineering Publications

Soil testing requires the analysis of large numbers of samples in the laboratory that is often time consuming and expensive. Mid-infrared spectroscopy (mid-IR) and near infrared (NIR) spectroscopy are fast, non-destructive and inexpensive analytical methods that have been used for soil analysis, in the laboratory and in the field, to reduce the need for measurements using complex chemical/physical analyses. A comparison of the use of spectral pretreatment as well as the implementation of linear and non-linear regression methods was performed. This study presents an overview of the use of infrared spectroscopy for the prediction of five physical (sand, silt ...


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