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Soil Science Quiz 5

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Soil Science Quiz 5

1 / 50

Sulphur is an essential component of:__________?

2 / 50

Accumulation of soluble salts in soil________?

3 / 50

Silica tetrahedron is__________?

4 / 50

Based on their diameters, soil pores are divided into:_________?

5 / 50

Soils that have more than 20% organic matter are termed as:__________?

6 / 50

Which of the following is a component of nucleic acid and protein:

7 / 50

The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are________?

8 / 50

Mechanisms of material uptake by plants is by________?

9 / 50

The plant in which CO2 fixation is solely via the Calvin cycle is_________?

10 / 50

Surface removal of ice or snow from a glacier or snowfield by melting, sublimation, and/ or calving:

11 / 50

According to FCO, the maximum permissible total N content in the form of urea in DAP should be:_________?

12 / 50

Thickness of Dikes ranges from___________________?

13 / 50

Which of the following is not a metamorphic rock?

14 / 50

Which compound decay slowly__________?

15 / 50

Each layer of phyllosilicates is composed of two types of sheets:

16 / 50

What is the pH of calcareous soils?

17 / 50

Deep percolation from a soil profile is generally measured by a device known as_________?

18 / 50

Exposure of the manures to rains causes highest loss of___________?

19 / 50

Accumulation of Al and Fe oxides and clays coming from the upper profile layers:

20 / 50

The available soil is being polluted quickly by _____________ wastes.

21 / 50

Silt stones consists of grains whose size range from________?

22 / 50

In cotton, zn deficiency is known as_________?

23 / 50

Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have ________________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:

24 / 50

Select the water soluble phosphatic fertilizer from the following__________?

25 / 50

The internal & external surfaces of soil colloids are positively and or negatively charged. Mostly ____________ is dominant:

26 / 50

Which of the following are secondary minerals:

27 / 50

Association of two microorganisms in which one is benefited while other remains unaffected is known as:________?

28 / 50

The appropriate method to apply phosphatic fertilizers is__________?

29 / 50

Shrinking and swelling is property of__________________?

30 / 50

Auxins promote___________________?

31 / 50

Rhizoplane is________?

32 / 50

Nutritive elements needed in large quantities to ensure normal plant development:

33 / 50

Which of the following is wrong?

34 / 50

Combination of soil genesis and classification is collectively called_________?

35 / 50

Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:

36 / 50

The inner shell of earth consists of_________?

37 / 50

If the chlorophyll content in plant increases, the solar radiation transmitted:

38 / 50

Which instrument is used for determining soil texture___________________?

39 / 50

The instrument used for measuring the photosynthetically active radiations (PAR) is:________?

40 / 50

The deficient macronutrient in the sodic soils is:_______?

41 / 50

Composition of igneous rock is determined by___________?

42 / 50

Large pieces of erupted magma are called_________?

43 / 50

Soil moisture and ET losses are_________________?

44 / 50

International day of forest is celebrated on___________?

45 / 50

Formula used for the calculation of sodium absorption ratio is__________?

46 / 50

Metamorphic rocks are formed from________?

47 / 50

What is Vesicular Arbuscular Mycorrhiza (VAM)?

48 / 50

Pakistan being predominantly an arid and semiarid country, In addition to agricultural productivity losses and increasing poverty, desertification results in significant reductions in _________?

49 / 50

Decomposition of the organic matter in submerged soil is carried out by?

50 / 50

In Pakistan, Indus plains are formed from ___________ parent material which was transported by Indus river and its tributaries from Himalayas?

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