Table 1. Harvest plant population, grain yield, test weight, oil content, and pounds of oil produced per acre in the Sunflower Date of Seeding Study on the Golden Valley County Conservation District Farm, Beach, ND, 1999. 1

Date Plant
population
Grain
yield2
Test
weight2
Seed oil
content
Oil
produced

---------------Fatty acids---------------

Palmitic Stearic Oleic Linoleic
no./acre lb/acre lb/bu % lb/acre -------------------- % --------------------
4-May 3

10926

701.1

30.6

39.0

273.1

4.5

4.8

59.9

27.5

24-May

9874

440.6

24.7

41.8

184.1

4.7

4.0

59.8

28.9

4-Jun

9111

277.8

24.5

42.3

117.9

4.6

3.8

57.2

32.0

14-Jun

5881

77.9

25.1

41.0

32.0

4.5

4.2

59.3

28.6

Mean

8948

374.3

26.2

41.0

151.7

4.5

4.2

59.1

29.2

CV%

16.3

17.1

2.4

1.3

17.5

8.5

7.2

14.8

29.1

LSD .05

2338.4

102.6

1.0

0.8

42.5

NS

0.5

NS

NS


1 Trial severely damaged by hail storm on August 15 and bird damage during growing season.
2 Adjusted to 10% moisture basis.
3 First date of seeding had severe sunflower moth damage.