Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Agricultural and Biosystems Engineering

First Advisor

Stuart Birrell

Second Advisor

Max Morris

Third Advisor

Brian Steward

Abstract

An experimental cleaning shoe was developed to compensate for sloped land by adjustment of shake speed, fan speed, and shake geometry. Grain loss on the cleaning shoe decreased compared to a conventional cleaning shoe exposed to similar conditions. Average grain losses of 0.710% and 6.560% on 5- and 10-degree side slopes in corn were reduced to 0.118% and 0.256% on the same side slopes using only modified shake geometry. Similar reductions in grain loss were seen in wheat, from 7.521% and 15.272% on both side slopes to 3.941% and 4.722% using only modified shake geometry. Grain loss prediction models were developed for each crop with R2 values of 0.8111 and 0.8440. Through modification of fan and shake speeds and shake geometry to field conditions, grain loss reduced from averages of 1.276% to 0.675.

DOI

https://doi.org/10.31274/rtd-180813-16649

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

James Monroe Hershbarger

Language

en

Proquest ID

AAI1457580

OCLC Number

654107286

ISBN

9780549871798

File Format

application/pdf

File Size

77 pages

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