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13
Jun
2014
Arkansas Corn and Grain Sorghum Weekly Update – June 13, 2014
Author: Kevin Lawson, Program Associate - Corn & Grain Sorghum Verification

Corn and Grain Sorghum Research Verification – Kevin Lawson (Corn & GS Verification Coordinator)

The corn verification fields in White, Mississippi, and Lonoke Counties suffered minor to moderate green snap from last week’s storms.  If there is no more rain this weekend, irrigation on corn fields will likely start next week as warm temperatures and dry weather are forecasted.

County

Hybrid

Growth Stage

Weekly Rain

Comments

———-Corn———-

Arkansas DKC64-69 VT3P

V13

2.40

Recommended  irrigation on June 16. (Scouted June 10)
Clay DKC64-83 VT3P

V6

1.95

Field is progressing well.  Should start irrigation next week. (Scouted June 12)
Jefferson DKC62-08 SS

V13

1.25

Recommended irrigation on June 13. (Scouted June 9)
Lee DKC66-87 VT2P

V14

4.00

Recommended applying 100 lbs of Urea and irrigate on June 16. (Scouted June 11)
Lonoke Armor 1330

V14

2.05

Field had minor green snap. Recommended irrigation on June 16.  (Scouted June 10)
Mississippi Pioneer 2089YHR

V14

3.50

Field had some green snap.  Recommended 100 lbs of Urea and irrigate on June 16. (Scouted June 12)
St Francis Terral 26BHR50

  Too wet to get to the field and scout.
White Armor 1550PRO

V15

1.90

Field had moderate levels of green snap from previous storms.  Recommended irrigation on June 14.  (Scouted on June 11)

———–Grain Sorghum———-

Chicot Dyna-Gro 765B

V13

0.60

Field is still progressing well.
Prairie Pioneer 84P80

V11

2.55

Field is still progressing well.

 

Average CRVP Growth and Development vs. 2014 CRVP.

Corn Stages

5 Year Avg CRVP Days to Stages

2014 Avg CRVP Days to Stages

5 Year Avg CRVP Height (in)

2014 Avg CRVP Height (in)

Avg CRVP Heat Units (2012 – 2013)

Avg CRVP Heat Units 2014

Planting

0

0 0 0

VE

10

10 0 0 145

150

V2

18

17 3 2 251

266

V4

28

26 6 5 425

463

V6

37

36 12 11 612

610

V8

45

43 22 18 791

766

V10

51

48 36 34 922

905

V12

56

53 52 51 1036

1046

V14

61

61 67 65 1155

1172

V16

65

  82   1256

 

R1

72

  106   1452

 

R2

78

  115   1615

 

R3

84

  115  

1811

 
R4

91

  115  

2005

 
R5

98

  115  

2199

 
R6

122

  115  

2919

 
Harvest

145

  115  

 

Southeast Arkansas Update – Wes Kirkpatrick (Desha County) & Kevin Norton (Ashley County)

Many corn fields are beginning to tassel or are at full tassel.  Many more will be getting a pre-tassel nitrogen application as soon as the soil dries up a little after several days of rainfall.

Central Arkansas Update – Brent Griffin (Prairie County)

Heavy rainfall limited field work this week. Corn and grain sorghum is showing water logged symptoms. Many fields are very uneven and may impact yields.

Northeast Arkansas Update – Herb Ginn (Lawrence County) & Branon Thiesse (Craighead County)

Craighead County – We have received over 5 inches of rain in the past week, with very strong storms arriving Thursday afternoon (June 6th). We have some corn that green snapped and some leaning severely and some miraculously unaffected. The leaning corn has begun to straighten, but to what degree remains to be seen. A large percentage of the corn is at or near the stage for pre tassel nitrogen applications. We had 24 hours of dry and sunshine but forecast is for more rain Thursday night (June 12th).

Lawrence County – Some early corn fields are beginning to show tassels at this writing, but many fields are around the V8 to V9 growth stage.  Much of our grain sorghum is around the V7 growth stage, unfortunately with all the recent rains we have had, some fields look more like rice fields with a permanent flood established rather than grain sorghum fields.  Hopefully we will get a break in the rain soon and have a return of warmer temperatures and sunshine!

River Valley Update – Kevin VanPelt (Conway County) & Hank Chaney (Faulkner County)

With the wet conditions we have not had to irrigate thus far and has also hindered pre tassel nitrogen applications to corn.  Hail damage was noted in some corn fields from recent storms. No wind injury was observed this week.

Heat Units

This week was very cool from the cloudy conditions.  Except for Southeast Arkansas, all the weekly heat unit accumulations were well below the 30 year average.

 Region of the state (city)

Heat Units Accumulated June 6 – June 13

30 Year Average Heat Units June 6 – June 13

Total Heat Units Since March 9

30 Year Average Heat Units Since March 9

Southeast Arkansas (McGehee, AR)

181

188 1,606

1,650

Central Arkansas (Des Arc, AR)

157

191 1,433

1,534

Northeast Arkansas (Jonesboro, AR)

159

178 1,416

1,374

River Valley (Morrilton, AR)

161

175 1,513

1,396


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