We are once again providing soil temperatures in the C.O.R.N. Newsletter for spring 2019. The Ohio Agricultural Research and Development Center (OARDC) Agricultural Research Stations located throughout the state have two and four inch soil temperatures monitored on an hourly basis.
Figure 1. Average daily air temperature (average of maximum and minimum daily temperatures; red-dashed), two and four inch soil temperatures for spring 2019 (brown and blue-solid, respectively), and two and four inch five-year average soil temperatures (brown and blue-dotted, respectively) for four OARDC stations from around Ohio (Northwest, Wooster, Western, and Piketon; see map insets). Conditions for 2019 are plotted through April 28th.
Figure 1 shows that there was some modest warming of soils last week with warmer air temperatures through Friday April 26th. However, a chilly weekend led to cooler daily average soil temperatures by Sunday April 28th, with three of the four stations indicating soil temperatures cooler than their five-year averages (Wooster, Western, and Piketon). The Northwest station demonstrates soil temperatures right the five-year averages. A warmer air mass this week should raise soil temperatures throughout the state.
For more complete weather records for all of the OARDC research stations, including temperature, precipitation, growing degree days, and other useful weather observations, please visit http://www.oardc.ohio-state.edu/weather1/.