week 6 wheatgd3b.pdf

7/27/2019 Week 6 wheatGD3b.pdf

1/15

7 days7 days

10 days

10 days

1-10 days1-10 days


2/15

212

dayssy12 days

Feekes 10.5.4

Watery ripe

12 days

12 days


3/15

15-17 days15-17 days15-17 days

15-17 days

Early milk stage

Feekes 11.1

15-17 days


4/15

15-17 days

20 days

20 days

20 days


5/15

20 days

25 days

25 days

Feekes 11.2 mealy ripe

Dough stageDough stage


6/15

27 days27 days

Hard Dough

Hard doughHard dough

Feekes 11.3 kernel hard

Dough StagesDough stages


7/15

Freeze damage

Crop Yield vs ET Relationships

Wheat- 10.1 in 6.0 bu/ain

4.5 bu/ain


8/15

Yield Components

Yield = (Heads/sq ft) x (kernels/head) x (kernel wt)x unit area

Example: wheat

(40 hds/sq ft) x (26 kernels/hd) x (0.0010666 oz/kernel)

x (43,560 sq ft/acre) (16 oz) 60 lbs/bu = 50 bu/a

Yield Components

Yield=(Heads/sq ft) x (kernels/head) x (kernel wt)

x unit area

Example: wheat yielded 75 bu/a;

how many heads per sq ft will there be?

75 bu/a x 60 lbs/bu x (16 oz) (43,560 sq ft/a)

(0.0010666 oz/kernel) (26 kernels/hd) = ? Heads / sq ft

Yield Components

Yield=(Heads/sq ft) x (kernels/head) x (kernel wt)

x unit area

Example: wheat yielded 40 bu/a;how many kernels per head will there be?

40 bu/a x 60 lbs/bu x (16 oz) (43,560 sq ft/a)

(0.0010666 oz/kernel) (35 heads/sq ft) = ?? kernels/hd


9/15

Lowering Wheat Yields

10C = 50F

15C = 59F

20C = 68F

25C = 77F

30C = 86F

35C = 95F

10C = 50F

15C = 59F

20C = 68F

25C = 77F

30C = 86F35C = 95F


10/15

42

58

70

70

73

89

88

7587

89

73

88

88

71

2004

46

52

65

68

70

88

89

7293

87

76

91

90

74

2006

49

51

67

70

68

96

95

6995

94

69

91

92

68

2003

0Check

80F8

80F6

40+40Split spring/F8

40+40Split spring/F6

120

80

40Spring60+60

40+40

20+20Split fall/spring

120

80

40Fall

N-rateTiming

Nitrogen Timing, Belleville 2003-06

10/4/02 @ 90 lbs/a; NH4NO3, spring application-2/18/03; Residual N (24)-26 ppm; LSD (0.05) 4

10/6/03 @ 90 lbs/a; NH4NO3, spring application-3/12/04; LSD (0.05) 5


11/15

P Rate Effect On Wheat YieldsKSU,Dickinson Co.,1978

30

35

40

45

50

55

60

65

70

75

0 10 20 30 40 50

PRate (Lb P2O5/A)

GrainYield(bu/a)

KnifeP

Broadcast P

Drill-row P

Leikam, et. al., 1980 Eghball and Sander, 2001

Preplant Banding, Broadcast/Inc. and Drill-

Row P Applications For Wheat

Subsurface Dual Band Simultaneous application of N in same soil

zone as P often termed Dual application For wheat generally similar to drill-row

P Rate Effect On Wheat YieldsKSU, Dickinson Co., 1978

30

35

40

45

50

55

60

65

70

75

0 10 20 30 40 50P Rate (Lb P2O5/A)

GrainYield(bu/a)

Knife P

Broadcast P

Drill-row P

Leikam, et. al., 1980

Effect o f Previous Crop and Fertilizer Placement on Wheat Yields- Parsons

Wheat Yield- 3 Yr Ave (bu/a)Ap plic ation Method S oybean Co rn Grain S orghum AVE

Knife 57.8 55.5 48.9 54.1Band 55.0 52.4 43.0 50.1Broadcast 52.8 50.1 39.4 47.4

AVE 55.2 52.7 43.8

Treatments applied prior to wheat planting

UAN and 10-34-0 were used on 36 inch centers for KN and

SB


12/15

Effects of N-P placement on wheat

yield components-3 yr ave

0.20.37LSD

31.624.5398Surface-bc

31.525.1410Surface-bd

31.026.2437Subsurface-kn

mgNo. Hd-1No. m-2

Kernel wtNo. KernelsNo.

Heads

N-P method

Effects of N-P placement on wheat

yield components-3 yr ave

31.026.5487120

0.30.38LSD

31.225.844880

31.824.638440

31.624.134020

mgNo. Hd-1No. m-2Lbs/a

Kernel wtNo. KernelsNo.

Heads

N-rate


13/15

No-Till Wheat

Manhattan 2005-06

645190-90 N Fung

564960-90 N

7153120-120 N

6447120-90 N

5343120-60 N

695390-120 N

554790-90 N

534490-60 N

655160-120 N

524660-60 N

Yield 06Yield 05TreatmentSeed-Fert

Nitrogen Content

Potassium Uptake


14/15

Phosphorus Uptake

Leaf Rust

North Central KS Southwest KS

Treatment Yield bu/a TW lbs/bu Yield bu/a TW lbs/bu

Fungicide 74 57 41 55.9Check 65 57 33 54.5

Effect of Fungicide Treatment on Wheat

Yields-2007


15/15

Sprouting in the head

Sprouted Kernels

week 6 wheatgd3b.pdf

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