Aaron P. Turner, S McNeill, Michael Montross, Mark E. Casada, Sidney A. Thompson, Ronaldo G. Maghirang, Marvin Carpena Petingco

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Knowledge of the pressure-dependent bulk density increase observed in stored grains and oil seeds, commonly referred to as packing or compressibility, is important for maintaining accurate grain inventory, evaluating wall loads, and other applications that require estimating density at specific depths in a bin. This study presents compressibility equation parameters determined utilizing a compilation of the best data available, including previously published and new datasets. In all, confined uniaxial compression tests for nine crops (barley, canola, corn, oats, rice, sorghum, soybeans, hard red winter wheat, and soft red winter wheat) were included. The data was fit using two candidate compressibility equations, both of which generally fit well and resulted in root mean squared errors ranging from 1.7 to 7.1 kg m-3, depending on the model and crop. For crops with full scale bin data available from previous research, the resulting equations were applied to estimate inventory and were compared with the measured mass of grain in the bin. Results from both equations were similar, and apart from oats, median errors were less than 2.5%.

Original languageEnglish
Pages (from-to)509-518
Number of pages10
JournalApplied Engineering in Agriculture
Issue number5
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 American Society of Agricultural and Biological Engineers. All rights reserved.


  • Bulk density
  • Compressibility
  • Grain storage
  • Pack factor
  • Stored grain inventory
  • Test weight

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'BULK COMPRESSIBILITY BEHAVIOR FOR SELECT CROPS'. Together they form a unique fingerprint.

Cite this