Oakes Irrigation Research Site
Carrington Research Extension CenterNorth Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Phone: (701) 742-2744, FAX: (701) 742-2700, E-mail: Walter.Albus@ndsu.edu

WEATHER AND IRRIGATION 2010

Table 1. Precipitation and temperature

Table 2. Growing degree units

Table 3. Dates of last and first frosts

Table 4. Irrigation water applied

 

The winter of 2009 - 2010 was colder than average with above average snowfall. Favorable conditions allowed early crops to be planted beginning mid-April. Row crop planting became difficult in May with untimely rainfall. The last frost in the spring was on May 9, about 7 days later than average. Summer temperatures were near average for most of the growing season. The maximum temperature equaled or exceeded 90F eleven times; twice in May, four times in July, and five times in August. The highest temperature was 96F on August 22. Precipitation was near average in April, May, and July; below average in June, August, and October. September rainfall was more than six inches above the long term average (9.33 inches). Annual precipitation was above average. The mean daily temperatures were above average in April, August, and October; near average in May, June, and July and below average in September. The first frost was October 15 with the first hard frost (≤ 28F) October 21. This was about two weeks later than normal. All crops reached maturity before frost. Growing degree units in 2010 were slightly below average.

 

 

Table 1. Precipitation and temperature at the Oakes Irrigation Research Site.

 

Month

Precipitation

Average daily temperatures

2010

15-year average

25-year average

2010

15-year average

25-year average

-------------------------- inches ------------------------

--------------------------F --------------------------

April

1.79

1.37

1.71

51

44

44

May

3.82

3.36

2.99

57

56

57

June

3.19

4.35

3.77

67

66

67

July

3.41

2.97

3.32

71

71

71

August

1.67

2.31

2.23

72

69

69

September

9.33

3.47

2.97

57

60

59

October

0.87

2.31

1.87

52

46

46

 

 

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Table 2. Growing degree units1 at the Oakes Irrigation Research Site.

Month

2010

10-year average

15-year average

25-year average

May

305

294

295

321

June

515

497

492

504

July

650

649

642

629

August

648

578

586

577

September

267

374

371

361

Total

2383

2393

2387

2391

1Growing degree units = (Tempmax + Tempmin)/2 - 50. If Tempmax is greater than 86, then

Tempmax = 86. If Tempmin is less than 50, then Tempmin = 50. Temperature is in degrees F.

 

 

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Table 3. Dates of last and first frosts.

2010

10-year average

15-year average

25-year average

Last frost in spring

32 F or less

May 9

May 5

May 2

May 4

28 F or less

Apr 8

Apr 27

Apr 26

Apr 27

First frost in fall

32 F or less

Oct 15

Oct 6

Oct 4

Oct 1

28 F or less

Oct 21

Oct 9

Oct 8

Oct 6

Frost free period (days)

159

154

155

150

 

 

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Table 4. Irrigation water applied, 2010.

Study

Irrigation water applied

inches

Barley variety trial

6.8

Dry edible bean trials

pinto bean variety trial

6.8

miscellaneous edible bean variety trial

6.5

navy bean variety trial

6.5

Energy sugarbeet variety trial

13.1

Field corn variety and row width study

9.5

Hard red spring wheat variety trial

6.8

Onion hybrid performance trial

11.3

Onion weed control study

11.3

Optimum corn stover removal for bio-fuel

corn on corn

9.8

corn on soybean

9.8

soybean on corn

9.8

Potato trials

13.0

Soybean nursery

conventional early

11.4

conventional late

11.4

natto

11.4

tufo

11.4

Soybean variety performance trials

conventional

11.4

roundup ready

11.4

Strip-till

corn on soybean

8.8

soybean on corn

9.3

corn on corn

9.8

Sunflower head rot study*

4.3

*Received additional irrigation via the misting system

 

Oakes Irrigation Research Site

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