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. 2019 Feb 26;9:2800. doi: 10.1038/s41598-019-38971-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Location-specific (n = 289 locations distributed in 27 states across the US – Fig. 1) spring frost probability for 0, −1, −2, and −3 °C at soybean emergence (at 15 DAS) for 30 DBS to a 30-DAS date bracketing the actual sowing date (set to 0). The red line shows the 20% spring frost probability threshold. The probabilities for each location were calculated using last 46 years of weather data (1981 to 2016).