Agri-MCQs # 3: Crop Management on Problem Soils

Last updated on March 18th, 2021 at 09:30 pm

1. Problem soil means.
a. Salt affected
b. Waterlogged
c. Eroded
* d. a+b+c

2. A normal soil is that which can provide to plant.
a. Nutrients
b. Moisture
c. Air
* d. Essential requirements

3. Basic reasons for salt accumulation are.
a. Solutions
b. Hydrations
c. Carbonation
* d. a+b+c

4. Salt affected soils are present in
a. Sub humid areas
b. Semi arid areas
c. Arid areas
* d. a+b+c

5. Salt affected soils are those in which salts are present in
a. Soluble form
b. Insoluble form
c. Crystal form
* d. a+b

6. Saline soils are those soils which have
* a. Ece > 4
b. Ece < 4
c. Ece > 4
d. Ece < 4

7 Sodic soils are those which have
* a. Ece < 4, ESP > 15 SAR > 13 pH 8.5-10
b. Ece < 4, ESP < 15 SAR < 13 pH > 10
c. Ece > ESP < 15 SAR < 13 pH > 10
d. Ece < 4 ESP < 15 SAR > 13 pH > 10

8 The pH of acid phosphate soils arounded 50 cm depth ranges between
a. 4.5 – 5.5
* b. 3.5 – 4.0
c. 2.5 – 3.5
d. 5.5 – 6.5

9. The colour of compact layer of subsoil in degraded soil is
a. White
b. Brown
* c. Dark
d. Dark Brown.

10. Saline soil may contain sufficient quantity of soluble
* a. CaSO4
b. NaCl
c. MgCl
d. FeSO4

11. Sodic soils are generally high in
a. NaCO3
b. NaHCO3
* c. a+b
d. CaCl2

12. Plant growth in sodic soils is adversely affected due to
a. Depressive affect of Na
b. High soil pH
c. Toxicity of some specific ions
* d. a+b+c

13. Extensive leaf injury occure due Na accumulation at a concentration
* a. Less than 0.05%
b. More than 0.05%
c. At 0.03%
d. At 0.06%

14. Marginal burn developed in leaves due to accumulation of
a. Na-1
b. HCO3-1
* c. Cl-1
d. NaHCO3-1

15 In beans and correct high concentration of Ca in soil solution restrict uptake of
a. Essential Nitrogen
b. Essential Phosphorus
* c. Essential K
d. Essential Zn

16. In sodic soil crop growth is adversely affected due to
a. Poor rooting
b. Poor aeration
c. Malnutrition
* d. a+b+c

17. In arid regions the dominant cation in normal soils are
a. Ca++
b. Mg++
* c. a+b
d. SO4

18. Soluble salts in the soil move from
a. High elevation to low elevation
b. Wet to dry areas
c. Irrigated field to unirrigated field
* d. a+b+c

19. The causes of salinity are
a. Dry condition
b. Inherent parent material
c. Canal water and wind
* d. a+b+c

20. The tolerance of Barley against salinity at germination stage is
a. Good
* b. Very good
c. Poor
d. Very poor

21. The plants can develop tolerance against salinity by
* a. Ormatic adjustment
b. Growth development
c. Transpiration
d. Irrigation application

22. In southern areas of Indus plain salt accumulated through irrigation water
* a. One t salts / acre / year
b. 0-5 t salts / acre / year
c. 1-5 to salts / acre / year
d. 2 t salts / acre / year

23. In northern areas salt accumulated through irrigation is
a. 0.2 t salts / acre / year
b. 0.3 t salts / acre / year
* c. 0.4 to salts / acre / year
d. 0.5 t salts / acre / year

24. Crop species shows greater tolerance in
a. Hot climate
b. Dry climate
* c. Cool & humid climate
d. Humid climate

25. Salt tolerance can be induced in crop varieties through
a. Breading programme
b. Selection of tolerant plants
* c. a+b
d. Radiation

26. Reclamation is process of removal of salts from
* a. Saline soil
b. Saline sodic soils
c. Degraded sodic soils
d. Sodic soils

27. Chemical amendments are used for the removal of salts from
a. Normal soils
b. Saline soils
c. Eroded soils
* d. Sodic soils

28. Reclamation is a process which involves
a. Scrapping
b. Flushing
c. Leaching
* d. b+c

29. Salt affected soil crops can be grown successfully through
a. Sowing on leveled field
b. Sowing on ridges
* c. Sowing on flat top ridges
d. Sowing on round top ridges

30. In west sowing the roots of seedling cause
a. Loosening of soil
b. Increased aeration
c. Increased activity of soil micro-flora
* d. a+b+c

31. Crop grown in saline soil must be
* a. Frequently irrigated
b. Delayed irrigated
c. Normal irrigated
d. Flood irrigated

32. Ryzohv concluded that saline soil in case of cotton should be irrigated at field capacity of
* a. 70%
b. 50%
c. 60%
d. 65%

33. In salt affected soil the irrigation should be applied by
a. Flood irrigation
b. Sprinkler irrigation
c. Drip irrigation
* d. b+c

34. In water logged soil crops should be sowing
a. On leveled soil
* b. On ridges
c. On flat top ridges
d. On round top ridges

35. In water logged soils pore spaces are filled with water by
a. 70%
b. 80%
* c. 100%
d. 90%

36. In waterlogged soils anaerobic conditions results in built up of
* a. CO2, Ethylene, H2S, SO2, etc.
b. O2, NO2, Amonium nitrate, Hydrogen etc.
c. Amonium, NO3, Helium, H2O2
d. H2SO4, Ammonium sulphate, Fe2SO4

37. Under waterlogged soils accumulation of
a. Inorganic acid
* b. Organic acid
c. Harmones
d. Growth regulator

38. In waterlogged soils the day temperature tends to be
a. Higher
* b. Lower
c. Optimum
d. Medium

39. In waterlogged soils the night temperature tends to be
a. Lower
b. Optimum
c. Medium
* d. Higher

40. In submerged or aquatic plants O2 may also enter
a. In gas form
b. In vapour form
c. a+b
* d. Combined form as water

41. Radox potential is measure of its tendency to
a. Accept electron
b. Donate electron
* c. Accept or donate electron (a+b)
d. To use O2

42. Under waterlogged condition the enzymetic activities in plants
a. Increased
b. Decreased
c. Stopped
* d. a+b

43. In waterlogged soils the aeranchyma formation takes place in
a. Leaves
b. Stem
* c. Roots
d. Shoots

44. Under waterlogged condition the hormonal metabolism becomes
* a. Up set
b. Stopped
c. Regulated
d. Motivated

45. The mineral & water uptake under flooded conditions are affected due to
a. Low transpiration
b. Increased Osmatic pressure
* c. a+b
d. High transpiration

46. The name of signal harmone produced in plants under waterlogged condition is
a. Cytokinin
* b. 1-aminocylo-propane-1-carboxylic acid
c. Gibberellins
d. ABA

47. The nodules mass or weight decreased under waterlogged condition due to non-availability of
a. CO2
b. Hydrogen
* c. O2
d. Ammonia

48. In acidic soil in rice crop the alternate wetting and drying in early growth season
a. Improve the aeration
b. Reduce the severity of reducing condition
* c. a+b
d. Saving water

49. Erosion is detachment and removal of soil particles by
a. Wind
b. Water
* c. a+b
d. Tillage

50. The types of water erosion are
a. Sheet erosion
b. Rill erosion
c. Gully erosion
* d. a+b+c

51. Mulching is a process of reducing water losses from soil by
a. Natural mulch
b. Artificial mulch
* c. a+b
d. Harvesting crops

52. In barani areas moisture can be saved by
a. Chemicals
b. Adding organic matter
c. Growing crops
* d. a+b+c

53. Wind erosion can be reduced by
a. Growing crops
b. Wind brakers
c. Adding organic matter
* d. a+b+c

54. In barani areas water can be conserved by
a. Reducing run off
b. Construction of minidams
c. Adding humus and organic matter
* d. a+b+c