Oakes
Table 1.
Precipitation and temperature
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 90°F (32°C) 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 98°F (36.7°C) 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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