Soil Temperatures and Accumulated GDD

The slow start to 2018 planting continues, but we would expect progress to accelerate this week as rainfall amounts lessen and air temperatures increase. We are at the calendar date where ground conditions rather than concerns about soil temperature will dictate planting. Soil temperature and accumulated Growing Degrees Days (GDD) from select OARDC Weather Station locations will be provided for at least a couple more weeks to help gauge when crop emergence should be seen. Based on current accumulated GDD (Table 1) we would not expect any emerged corn yet, based on the April 12 planting window that occurred, but any corn planted in that window in Southern Ohio should emerge soon.

 

 

Table 1. Weekly and Accumulated GDD values since April 12 from select OARDC weather locations. Corn emergence typically occurs between 100 and 120 GDD accumulation.

 

OARDC Branch Location

Dates

Northwest-Custer

Wooster

Western-Springfield

Piketon

North Central-Fremont

April 12-15

22

43

42

61

18

April 16-22

0

2

2

3

0

April 23-29

16

13

16

29

16

Sum of GDD Since April 12

38

58

59

93

34

About the C.O.R.N. Newsletter

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.