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

WEATHER AND IRRIGATION 2007

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 2006 - 2007 was mild with little snow cover for most of the winter. February and March saw several significant snow falls. Spring tillage and planting times were about average. The last frost in the spring was on April 17, about 12 days earlier than average. Summer temperatures were warmer throughout most of the growing season. The maximum temperature equaled or exceeded 90F (32C) twenty-two times; once in May, four times in June, five times in July, twice in August and three times in September. The highest temperature was 98F (36.7C) on July 7. Precipitation was above average in May, June and August; below average in July and October; and about average in April and September. Total annual precipitation was almost six inches above the long-term average. The average daily temperatures were average in September; above average in May, June, July, August and October and below average in April. The first frost was on October 22 and first hard frost was on October 24. The first frost was more than three weeks later than the long term average and the first hard frost was 20 days later than the long-term average (25-year). All crops matured before frost. Growing degree units in 2007 were above average.

 

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

Month

Precipitation

Average daily temperatures

2007

15-year average

25-year average

2007

15-year average

25-year average

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

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

April

1.39

1.47

41

44

May

8.36

3.45

3.00

60

57

57

June

5.17

3.88

3.66

69

67

67

July

2.41

3.49

3.27

73

71

71

August

2.64

2.09

2.11

67

69

69

September

2.44

2.95

2.59

60

60

59

October

0.99

2.07

48

46

The 25-year averages are not available for April and October.

 

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

Month

2007

10-year average

15-year average

25-year average

May

372

305

301

322

June

560

494

500

500

July

696

663

632

632

August

509

583

580

577

September

384

376

368

351

Total

2521

2421

2381

2382

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.

2007

10-year average

15-year average

25-year average

Last frost in spring

less than 32 F

17-Apr

29-Apr

1-May

4-May

less than 28 F

15-Apr

26-Apr

26-Apr

28-Apr

First frost in fall

less than 32 F

22-Oct

29-Sep

29-Sep

28-Sep

less than 28 F

24-Oct

5-Oct

6-Oct

4-Oct

Frost free period (days)

188

154

151

147

 

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Table 4. Irrigation water applied, 2007.

Study

Irrigation water applied

inches

Barley variety trial

5.5

Cabbage hybrid performance trial

15.6

Carrot hybrid performance trial

Cello

6.8

Dicing and Jumbo

15.6

Dry edible bean variety trial

8.0

Field corn population and row width study

12.5

Field corn continuous strip till N-rate study

9.0

Hard red spring wheat variety trial

6.3

Onion hybrid performance trial

13.1

Onion conventional vs strip till

13.1

Onion weed control study

16.7

Soybean inoculation studies

10.0

Soybean nursery conventional

9.6

Soybean nursery roundup ready

10.5

Soybean plant population and row spacing study

10.0

Soybean variety trial

10.5

Strip-till

corn on soybean

11.0

soybean on corn

8.8

Sugar beet variety trial

12.1

Sunflower head rot study

5.8

Tomato/pepper studies

16.2

 

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Go to Oakes Irrigation Research Site 2007 Annual Report

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