Date of this Version
Accepted for publication in Transactions of the ASABE, 2021
The objectives of this study were to compare effects of 0-16% (w/w) splits content (xs) of soybeans stored at 35°C and 18% moisture content (w.b.) on dry matter loss rates (vDML), and to determine a splits multiplier (MS) for soybeans stored at these conditions, similar to the damage multiplier (MD) utilized in ASABE Standard D535 for shelled corn. Effects of percentage by weight splits (xs) on MS and safe storage time are expected to be greater than MD for corn because soybeans are prone to cracking and splitting, lipid oxidation, and protein degradation – all of which lead to grain dry matter and quality losses. Results indicated vDML increased with increasing xs and mean vDML for samples with 16% splits was 1.5 times greater than that for samples with 4% splits. MS for soybeans was linearly correlated with xs, decreasing from 1.0 to 0.60 for 0% to 16% splits, respectively. Soybeans appeared to be more sensitive to percent by weight splits than was corn to the presence of damaged kernels. MD for corn only decreased from 1.0 to 0.8 when percent (w/w) damaged kernels content increased from 30% to 40%. In comparison, it should be noted that damage to soybeans was defined differently from damage to corn. This research is useful in defining MS for 18% moisture content soybeans stored at 35°C under hermetic conditions. The procedures outlined in this paper may be used in the future to more formally define a soybean MS that covers a wider range of moisture contents, storage conditions and possibly a MD based on other factors included in the USDA definitions of damaged soybean kernels.