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Rapid Method For Measuring Kernel Density 1
Author(s) -
WesselBeaver L.,
Beck R. H.,
Lambert R. J.
Publication year - 1984
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1984.00021962007600020030x
Subject(s) - kernel (algebra) , zea mays , cage , mathematics , kernel density estimation , displacement (psychology) , volume (thermodynamics) , opacity , container (type theory) , agronomy , statistics , materials science , physics , biology , optics , combinatorics , thermodynamics , psychology , estimator , psychotherapist , composite material
A rapid, accurate, and reproducible method for measuring corn kernel density is needed if selection for density in a breeding program is to be effective. Comparisons of two methods involving the Archimedes principle for measuring corn ( Zea mays L.) kernel density included: 1) water displacement in a graduate cylinder and 2) a cage of kernels submerged in a tared water container resting upon a balance. Sixty samples of opaque‐2 corn (45 kernels each with densities from 960 to 1250 kg m ‐3 ) were analyzed. The cage method required 67 vs. 136 min/60 samples for kernel volume measurements and was more repeatable (r = 0.94** vs. r = 0.67**). The coefficients of variation for the two methods and the two analysts ranged from 4.9 to 5.6%. The cage method is rapid, accurate and reproducible.