Tracking Soybean Plant Development Stages

Greg Endres


During the past three years (2004-06) at the NDSU Carrington Research Extension Center, soybean varieties with relative maturity 0.0 and 0.5 were monitored during the growing season to determine days required for plants to reach selected growth stages. The objective of the work was to develop a table as a quick reference to estimate time required for soybean to reach a certain stage for management purposes (e.g. proper timing for application of crop protection products).


Below is a table that contains the currently-compiled soybean plant development data. The data is listed by year and relative maturity, three-year averages by relative maturity, and three-year average across relative maturities.