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Rapid bulk density measurement using mobile device photogrammetry
Author(s) -
Whiting Michael,
Salley Shawn W.,
James Darren K.,
Karl Jason W.,
Brungard Colby W.
Publication year - 2020
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.1002/saj2.20063
Subject(s) - photogrammetry , volume (thermodynamics) , laser scanning , remote sensing , sample (material) , measure (data warehouse) , geology , computer science , laser , optics , chemistry , physics , chromatography , quantum mechanics , database
Soil bulk density ( D b ), the ratio of soil solid mass to bulk soil volume, is an important but difficult soil property to measure. Existing methods are either expensive, time consuming, or destructive to the sample. The goal of this research was to investigate the utility of photogrammetry for measuring D b . Photogrammetry is the determination of shape and volume from multiple overlapping photos. Photos of soil peds placed on a 3D‐printed turntable were obtained using two mobile devices. Photogrammetry‐measured volume and D b were compared with volume and D b measured using the clod and 3D laser‐scanning methods. No significant differences between D b measured by any method were found. No statistical difference between cameras types was found. We conclude that photogrammetry is a useful method for measuring D b . Measuring D b using photogrammetry was much easier than the other methods and was less expensive and faster than 3D laser scanning.