Questions

Answer

1

Botanical name

Gossypium sp.

2

Family

Malvacea

3

Origin of Cotton

India

4

G. arborium & G. herbaceum are

Desi cotton

5

Chromosome number in G. arborium & G. herbaceum is

2n = 26 (Diploid)

6

G. barbadence is called as 

Sea island cotton

7

Chromosome number in G. hirsutum & G. barbadence

2n = 52 (Tetraploid)

8

American cotton is

G. hirsutum

9

Alternative names for cotton

White Gold, King of Appraisal Fiber

10

Colour of Desi cotton is 

Dull white / Brown

11

American cotton fiber color is

Creamy white

12

Oil content in cotton seed is

14.5 – 25.6 %

13

Protein percent of cotton seed is

20 %

14

Lint percent

33 %

15

Cotton is highly sensitive to

2,4-D & Glyphosate

16

2,4-D resistant cotton gene is

Gene tfd-A

17

General ginning range is

30 – 35 %

18

Best suited soil for cotton cultivation is

Black soil

19

Common weedicide used in cotton is

Diuron

20

Weight of 1 bale of cotton is

170 kg

Questions

Answer

21

Fiber maturity is measured by

Arealometer

22

Fiber thickness is measured by 

Nepiness

23

Fiber strength is measured by

Stelometer

24

Spinning performance is measured by

Number of counts

25

Fiber length & Staple length of cotton is measured by

Halo measurement method

26

Short fibers attached to seed after ginning is

Tinter

27

Chemical fertilizer requirement of cotton

100 – 120 N : 20 -30 P : 15 – 20 K kg/ha

28

Number of counts required for best quality cotton is

80 – 400 counts

29

Number of counts in Indian cotton

22 counts

30

Fiber will be very strong when breaking point is more than 

95 kg/sq cm

31

If fiber average weight is below 3.0 micro gram then it is regarded as 

Very fine fiber

32

Elongation / outgrowth of an epidermal cell of seed coat

Cotton fiber

33

Number of fiber present in one seed

60000 – 80000 fibers

34

How many cotton species are cultivated out of 20 cotton species 

4 species

35

Little leaf in cotton is due to

Zn deficiency

Questions

Answer

36

Seed rate of Desi cotton

10 – 18 kg

37

Seed rate of American cotton

15 – 25 kg

38

Seed rate of Hybrid cotton

2 – 3 kg

39

Seed rate of Bt cotton

1 – 1.5 kg

40

Spacing requirement of Desi cotton

67.5 x 30 cm

41

Spacing requirement of American cotton

67.5 x 30 cm

42

Spacing requirement of Hybrid cotton

100 x 60 cm

43

Plant population /ha (Bt cotton)

10,000

44

Plant population of cotton/ha

50,000 – 80,000

45

Vegetative branches

Monopodial

46

Reproductive branches

Sympodial

47

Cotton boll maturity attains at

25 Days

48

Southern Ethiopia cotton is

G. herbaceum

49

Central American cotton is

G. hirsutum

50

South American cotton is also known as

Egyptian cotton

51

Cotton is a

Warm season crop

52

Reddening of cotton leaves is due to

Mn deficiency

53

Cotton – Berseem is

Relay cropping

54

Soybean with cotton

Parallel cropping

55

Cotton + Green gram / Black gram

Companion cropping

Cotton insect pest and diseases are posted in Entomology and Pathology Section