Cotton Planting Conditions, May 11, 2017 – a Tale of Two Cities!
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Collapse ▲Keith Edmisten, Professor of Crop Science and Extension Cotton Specialist
Guy Collins, Extension Associate Professor – Cotton
We have made a few changes to the chart below to better define planting conditions. In addition, we cap DD60’s at a maximum value of 10 for each day. If you are computing DD60 accumulation on your own and a day is predicted to have 15 DD60’s, only use 10 for that day.
| Relationship Between Predicted DD-60s and Planting Conditions. | |
| Predicted DD-60 accumulation for five days following planting |
Planting conditions
|
| 10 or fewer | Very poor |
| 11 to 15 | Marginal |
| 16 to 25 | Adequate |
| 26 to 35 | Good |
| 36-49 | Very good |
| 50 | Excellent |
| Avoid planting cotton if the low temperature is predicted to be below 50°F for either of the two nights following planting or predicted daily DD60’s is near zero for the day of planting. | |
Soil temperature at a 3 inch depth was 67.9 degrees at 6 this morning (May 10) at Rocky Mount.
Normally we only report Rocky Mount planting conditions because conditions would be similar or slightly better for other parts of the state. That is not the case for the next couple days as we have a front that is causing a pretty wide difference in temperatures between the northeastern part of the state and the rest of the state. Today we are reporting conditions for Halifax and Goldsboro in the table below. Goldsboro is pretty much a no-brainer, plant. Halifax on the other hand is not as clear. The discrepancy between the two places illustrates that you may want to calculate DD60s for you own area, especially when we have a front in the state that would make Rocky Mount different from your home area.
We have cool temperatures predicted for May 12 and 13th in Halifax. This is not near as concerning as the last 5 day cool period we have but is long enough and cold enough to cause some concern and influence soil temperature in a negative way. If you need to plant through this two day period may more attention to the recommendations at Tips for Improving Cotton Stands During Periods of Marginal Planting Weather. Some of you can finish your planting in a week or so and can stop planting during this two-day period and resume planting when soil temperature approach 65 on the 14th. The warm soil temps we have now should make planting the rest of today fairly safe.
Rocky Mount is predicted to be a little warmer than Halifax, but more similar to Halifax than Goldsboro.
|
Date |
Daily DD60s* | DD60s for next 5 days | Low temp | Planting condition | Daily DD60s* | DD60s for next 5 days | Low temp | Planting condition |
|
Halifax |
Goldsboro |
|||||||
| May 11 | 4.5 | 18.5 | 54 | Adequate | 10 | 38.5 | 62 | Very Good |
| 12 | 0 | 24 | 56 | Marginal** | 7 | 38.5 | 62 | Very Good |
| 13 | 0 | 34 | 49 | Marginal** | 1.5 | 41.5 | 53 | Good** |
| 14 | 7.5 | 44 | 56 | Very Good*** | 10 | 50 | 59 | Excellent |
| 15 | 6.5 | 46.5 | 54 | Very Good | 10 | 50 | 59 | Excellent |
| 16 | 10 | 50 | 60 | Excellent | 10 | 50 | 63 | Excellent |
| 17 | 10 | 50 | 65 | Excellent | 10 | 50 | 67 | Excellent |
| 18 | 10 | 50 | 66 | Excellent | 10 | 50 | 68 | Excellent |
| 19 | 10 | 50 | 64 | Excellent | 10 | 50 | 67 | Excellent |
| 20 | 10 | 50 | 64 | Excellent | 10 | 50 | 66 | Excellent |
| 21 | 10 | 50 | 66 | 10 | 50 | 69 | ||
| 22 | 10 | 65 | 10 | 68 | ||||
| 23 | 10 | 65 | 10 | 68 | ||||
| 24 | 10 | 65 | 10 | 67 | ||||
|
25 |
10 | 65 | 10 |
67 |
||||
*DD60’s are capped at 10 for any one day.
** Planting on days where DD60’s are at or near 0 is risky.
*** Planting condition after soils warm up to near 65 degrees for the day.