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Soil Science Quiz 4

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Soil Science Quiz 4

1 / 50

Oxygen and Silicon together comprise approximately ______ %of the earth crust?

2 / 50

The dominance of acidity creates toxicity?

3 / 50

Chromium (Cr) is a________?

4 / 50

The science of growing terrestrial plants in an aerated solution is known as___________________?

5 / 50

The molar mass of NaCl is_________?

6 / 50

The atmospheric layer lies closest to the earth surface is known as___________________?

7 / 50

The unit of electrical conductivity is________?

8 / 50

The nutrient particularly influencing root growth is___________________?

9 / 50

Examples of prismatic structures are found in the _______________ mapped in KPK and the northern part of Punjab.

10 / 50

The credit for identifying the essentality of K, Ca, Mg and P to planta goes to________?

11 / 50

Size of clay particle is___________________?

12 / 50

Fe is trivalent in which of the chemical compound:

13 / 50

According to one estimate, wind and water erosion over ______ % of the Pakistan?s total area?

14 / 50

Availability of Zn is higher to crops in:_________?

15 / 50

Antioxidant is used to reduce the process of_________?

16 / 50

Which leaf of rice is sampled for tissue nutrient analysis?

17 / 50

There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?

18 / 50

Soil samples are collected:

19 / 50

The configuration of a surface and the relations among its man-made and natural features is called:________?

20 / 50

The capacity of a soil to function on sustained basis promoting plant & animal health:

21 / 50

The Tree sends down roots from its branches to the soil is known as:___________?

22 / 50

The exact formula for calculating the base saturation percentage is_________?

23 / 50

Common soils found in Pakistan are___________________?

24 / 50

The most abundant metal in the earth?s crust and toxic to plants in low concentration is________?

25 / 50

The tree sends down roots from its branches to the soil is know as:_______?

26 / 50

While handing concentrated acids. bases or other hazardous chemicals use_________________?

27 / 50

Soil erosion is __________ of soil from one place ti another place by natural agencies (wind & water):

28 / 50

International Union of Soil Sciences?(IUSS),?founded?in___________?

29 / 50

Soils that have more than 20% organic matter are termed as organic soils. These are also called:________?

30 / 50

Which of the following statement is wrong regarding, Soil ____________?

31 / 50

Who gave the defination of humic acid ?

32 / 50

What is a soil horizon?

33 / 50

The exact formula for sodium hexametaphosphate is___________________?

34 / 50

The device used for the measurement of positive pressure potential of soil water is known as_________________?

35 / 50

The very high temperatures required for ICP-AES are attained by__________?

36 / 50

The suitable species for reclamation of saline & sodic soil is:__________?

37 / 50

Process of mixing soil by fauna and flora is called__________________?

38 / 50

The net reaction of photosynthesis is_________?

39 / 50

The following types of check dams have been tried in Pakistan:

40 / 50

Specific heat of organic matter is______?

41 / 50

The maximum amount of water which a soil can hold after free drainage has ceased is called as_______?

42 / 50

In Pakistan, Nitrophos is manufactured in_________?

43 / 50

The marble is a__________?

44 / 50

The term rhizosphere was coined by:___________?

45 / 50

Examples of micro biota are________?

46 / 50

The most suitable species for reclamation of sandy soils is:_________?

47 / 50

The moisture content below which a cohesive soil does stick to metal tools is known as__________?

48 / 50

Potassium (K) occurs as a constituent of the earth?s crust in the proportion of_________?

49 / 50

The time for which water and ion remains in vicinity is called_________?

50 / 50

Soil is a mixture of__________?

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