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Field Pea Planting Date Effects on Yield and Various Agronomic Traits, Langdon 1998-2000.

 

Bryan Hanson, North Dakota State UniversityLangdon Research Extension Center

Phone 701-256-2582, email bhanson@ndsuext.nodak.edu

 

A field pea planting date trial was conducted at the Langdon Research Extension Center from 1998-2000 to evaluate the effect of planting date on field pea yield and other agronomic traits.Cultivar �Integra� (yellow-cotyledon) was sown at the rate of 300,000 live seeds/acre in a randomized complete block design with four replications each of the three years of the study.Individual plots were 7 � 6 inch spaced rows x 16 feet long.Other production practices were followed according to NDSU recommendations.

 

Results from the trial are presented in Table 1.The average yield of the 2nd, 3rd and 4th planting date was decreased by 15, 36, and 69 percent, respectively, when compared to the first planting date.Much of the decreased yields in 1998 and 1999 were associated with increased levels of powdery mildew.The decrease in yield with later planting dates was also reflected in significantly more seeds/lb (smaller seed size).Test weight was not affected by planting date.�� Days to flower and mature both decreased as planting date was delayed.Lodging was generally lower at the later planting dates.

 

This study reconfirms previous research which recommends planting in late April and early May to obtain maximum seed yield.Planting early promotes as much plant development possible before the major heat and water stresses occur.

 

Table 1.Planting date effect on yield and various agronomic traits of field pea, Langdon 1998-2000.

 

 

 

 

 

 

 

 

 

 

 

 

 

Planting Date

 

Yield (bu/a)

 

Test Weight (lbs/bu)

98

99

00

 

98

99

00

Avg.

 

98

99

00

Avg.

M6

A30

A26

 

75.2

62.0

63.1

66.8

 

63.9

62.0

61.6

62.5

M19

M18

M8

 

60.5

48.0

62.2

56.9

 

63.3

62.8

61.6

62.6

J1

M27

M23

 

38.1

36.8

54.8

43.2

 

63.6

61.4

62.1

62.4

J9

J8

J5

 

19.5

12.7

31.7

21.3

 

63.4

61.8

62.1

62.4

LSD 5%

 

 

5.7

7.3

14.9

 

 

NS

NS

NS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Planting Date

 

Days to Flower

 

Days to Mature

98

99

00

 

98

99

00

Avg.

 

98

99

00

Avg.

M6

A30

A26

 

54

59

60

58

 

93

97

98

96

M19

M18

M8

 

51

51

55

52

 

90

91

91

90

J1

M27

M23

 

45

47

48

47

 

82

87

82

83

J9

J8

J5

 

43

46

46

45

 

78

86

78

81

LSD 5%

 

 

1

NS

1

 

 

1

1

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Planting Date

 

Vine Length (in.)

 

Lodging (0-9)

98

99

00

 

98

99

00

Avg.

 

98

99

00

Avg.

M6

A30

A26

 

49

44

39

44

 

6.0

7.8

6.5

6.8

M19

M18

M8

 

45

42

39

42

 

5.8

6.8

6.5

6.4

J1

M27

M23

 

45

37

42

41

 

2.5

5.0

6.5

4.7

J9

J8

J5

 

46

33

33

37

 

4.5

4.0

4.0

4.2

LSD 5%

 

 

2

4

2

 

 

NS

2.0

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Planting Date

 

Seeds/lb

 

 

 

 

 

98

99

00

 

98

99

00

Avg.

 

 

 

 

 

M6

A30

A26

 

1780

1976

1627

1794

 

 

 

 

 

M19

M18

M8

 

2237

1990

1681

1969

 

 

 

 

 

J1

M27

M23

 

2650

2312

1792

2251

 

 

 

 

 

J9

J8

J5

 

3054

2683

2250

2662

 

 

 

 

 

LSD 5%

 

 

246

274

183