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AGR 547 (Crop Mgmt) > Exam 3 > Flashcards

Exam 3 Flashcards

1
Q

What is Feekes Stages 2&3?

A

-Tillering Stage

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2
Q

What is Feekes Stage 6?

A

-Jointing Stage

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3
Q

What is Feekes Stage 10.1?

A

Heading Stage

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4
Q

What is Feekes Stage 10.5?

A

Anthesis/Flowering Stage

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5
Q

What happens at Feekes Stage 2&3?

A

-Tillers are developing below soil surface

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6
Q

What happens at Feekes Stage 6?

A
  • The internode begins to elongate

- The 1st node is a measurable distance above the soil surface

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7
Q

What happens at Feekes stage 10.1?

A

-The seed head of the Wheat emerges

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8
Q

What happens at Feekes 10.5?

A

-The Wheat is flowering, the anthers are out

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9
Q

How are wheat maturities measured? What also slightly affects this?

A
  • By the heading dates

- Slightly affected by planting date

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10
Q

What is the issue with wheat planted too early?

A

-Is suseptible to late winter/early spring freezes

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11
Q

What is the issue with wheat planted too late?

A

-Is suseptible to high temperature stress in early summer

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12
Q

What is the problem with overseeding wheat?

A

-It becomes more suseptible to lodging

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13
Q

What is the problem with underseeding wheat?

A

-It lowers the yield potential

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14
Q

In the experiment from class, what was the results of continuous wheat?

A

-Conventional till continuous wheat yielded slightly better than the no-till

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15
Q

In the experiment from class, what was the results of corn/wheat rotation?

A

-Corn yielded significantly higher under no-till while wheat yielded slightly lower

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16
Q

In the experiment from class, what was the results of soybean/wheat rotation?

A

-Soybeans yielded higher under no-till while wheat yielded slightly lower.

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17
Q

How did the soil that was under no-till benefit compared to the conventional tilled soil?

A

-It had significantly better hydraulic conductivity and greater mesopores.

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18
Q

What are the recommended wheat planting dates?

What is this close to?

A
  • 1 week before to 1 week after the average 1st frost date.

- Close to old “Hessian Fly-Safe Dates”

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19
Q

What are the recommended seeding rates for no-till and conventional till wheat?

A
  • 40 seeds per sq. ft. [no-till]

- 35 seeds per sq. ft. [conv. till]

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20
Q

What is the recommended seeding depth range for wheat?

A

-3/4” to 1 and 1/4”

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21
Q

What is the recommended row widths for conv. till and no-till wheat?

A
  • 4” [conv. till]

- 7” [no-till]

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22
Q

What are tramlines?

A

-Skips in the planting area of wheat for equipment to drive in after the wheat starts to elongate.

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23
Q

What is the idea pH of wheat?

A

6.4

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24
Q

How is N recommended to be applied for wheat?

A

-In 3 applications:
>once in the fall(DAP usually covers this)
>topdress in split app in feb. and march

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25
Q

What are recommended amounts of N to be topdressed onto wheat?

A
  • 80-110lbs/Ac [conv. till]

- 100-120lbs/Ac [no-till]

26
Q

What is the legal test weight of wheat and at what moisture percentage is this?

A

-60lbs/Bu at 13.5% moisture

27
Q

What does test weight reflect in wheat?

A

Quality

28
Q

(T/F) You must manage wheat completely and perform all necessary “steps” to profit. Failure to do any of the 3 steps will result in profit loss, not gain.

A

True

29
Q

In the tobacco variety name “KTD6LC”, what do the following portions stand for?

  • KT?
  • D?
  • 6?
  • LC?
A
  • Kentucky Tennessee (location variety was developed)
  • Dark (type of variety)
  • 2006 (year of release)
  • Low Converter (Approval of low converter requirement)
30
Q

What height are tobacco plants restricted to in plant beds?

A

4-5” tall

31
Q

How long are tobacco plants kept in plant beds?

A

8 weeks

32
Q

How many plants per acre are set when planting tobacco?

A

5,000

33
Q

What is the row spacing of tobacco?

A

40” rows

34
Q

What is the interow plant spacing of tobacco?

A

32” between plants

35
Q

What are tobacco plants topped?

A

To remove the terminal bud thus directing plant resources from seed development to leaf development

36
Q

What is the desired number of leaves per plant for Burley and Dark Tobacco?

A

Burley: 18-26 leaves
Dark: 16 leaves

37
Q

How long are tobacco plants “fired”?

A

5-10 days each for 2 to 4 times

38
Q

What program in 2004 lifted a lot of restrictions off of tobacco growers?

A

Tobacco buyout program

39
Q

What are the 2 types of tobacco?

A
  • Burley

- Dark Fired

40
Q

What are the 4 types of Dark Tobacco?

A
  • Western fire cured
  • Eastern fire cured
  • green river air cured
  • one sucker air cured
41
Q

What was the old favorited variety of dark tobacco because of its yield and quality?
What was the one flaw of this variety?

A
  • Narrowleaf Madole

- Has poor disease resistance

42
Q

What is the new favorite variety of dark tobacco?

What is significant about this variety compared to Narrowleaf madole?

A

KTD17LC

-Is resistant to black shank and black root rot

43
Q

What does LC mean in tobacco?

A

Is a low converter which means the variety has less chance to convert nicotine to nornicotine.

44
Q

What does nornicotine do that is bad and what does it form that is bad?

A

It can react with nitrite to form TSNA’s (Tobacco specific nitrosamines) which are carcinogenic.

45
Q

What does tobacco roots have a poor tolerance for?

Why?

A

Poor drainage

Because they must have oxygen to respirate to allow water inside.

46
Q

Is tobacco a perennial or annual?

A

Perennial

47
Q

How is tobacco treated here in terms of growing season?

A

Grown as an annual

48
Q

Most burley varieties of tobacco now have a ____to_______ level of resistance to black root rot disease.

A

medium to high

49
Q

What nutrient does burley varieties need more of when pH is below 6.6?

A

Molybdenum

50
Q

How many pounds of N should be applied to tobacco in the field/

A

150-300lbs

51
Q

What is recomennded pH of tobacco when black root rot is present in field of burley? dark/

A

between 5.5 and 5.8 in burley

between 5.6 and 6.0 in dark

52
Q

What were the 3 types of sucker control?

A
  • Contact control agents
  • Local systemic control agents
  • Systemic control agents
53
Q

Where must local systemic control agents be applied? What type of tobacco are these commonly used in?

A
  • directly to auxillary buds

- common in dark tobacco

54
Q

Where must contact control agents be applied?

What type of tobacco are these commonly used in?

A
  • directly to auxillary buds

- common in dark tobacco

55
Q

Where must systemic control agents be applied?

What type of tobacco are these commonly used in?

A
  • over the top of the plant in large droplets

- common in burley tobacco

56
Q

What is the rate that narrowleaf madole gains lbs after topping?

A

120lbs per acre up to 9 weeks after topping.

57
Q

What are the 3 grades of tobacco leaves?

A
  • lugs
  • seconds
  • leaf
58
Q

(T/F) It is okay to use 0-0-60 on tobacco.

A

False

59
Q

What are the modifications needed on a tobacco setter to set no-till tobacco?

A
  • Wavy or fluted coulter
  • subsoil tillage shank
  • modified press wheels
60
Q

Most glyphosate formulations have statement on the label that requires a ____ day waiting period before planting crops not specifically listed on the label.

A

more than 30 days

61
Q

________ are not desirable in rotation with tobacco due to the possibility of black root rot problems.

A

legumes

62
Q

How can ripeness of tobacco be determined?

A

By doubling leaves between fingers and seeing if the leaves crack or not.

AGR 547 (Crop Mgmt) (3 decks)

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