Soil Science Quiz 3

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Soil Science Quiz 3

1 / 50

The process of transformation of raw organic matter into humus:

2 / 50

According to the Soil survey of Pakistan, the total waterlogged summer-rain area in the country is:_________?

3 / 50

Electrical conductivity of saturated paste is written as________?

4 / 50

TSP contains________?

5 / 50

_______________ of alluvium (stratified sediment) by earth-worms is the most important soil-forming process in the alluvial plain of Pakistan:

6 / 50

Soil Organic Matter (SOM) serves not only as a reservoir of all the required plant nutrients, but it:

7 / 50

Most out standing green manure crop is__________?

8 / 50

Tunnel erosion is the form of:__________?

9 / 50

Most abundant organic compound in nature?

10 / 50

Total salt affected soils of Pakistan are________?

11 / 50

Attraction between similar particles is called________?

12 / 50

The chemical formula of Hematite is_________?

13 / 50

______________ consist of particles that are produced by disintegration of pre-existing rocks through the process of weathering:

14 / 50

The immobilization and accumulation of the eluviated constituents at some depth beneath the soil surface:________?

15 / 50

The earth core is made of the following metals __________?

16 / 50

International Union of Forest Research Organization (IUFRO) is located:

17 / 50

Journal ?Plant and Soil? is published from__________?

18 / 50

Biological Weathering involves:

19 / 50

Biochemical reduction of nitrate to nitrite or gaseous nitrogen is called ____________?

20 / 50

Sustainable technologies to improve soil fertility and physical condition:

21 / 50

Rhyolite in nature is__________?

22 / 50

The removal of excess water from the ground surface is called:________?

23 / 50

Plutonic rocks are also called________?

24 / 50

In Pakistan, approximately __________ mha of irrigated land is affected by salinization:

25 / 50

Phosphorus (P) is the second major nutrient essential for plant growth. With the exception of Nitrogen (N) and Potassium (K), Phosphorus is required by plants in_________?

26 / 50

Weathering of gabbros gives_________?

27 / 50

Which of the following soil has the highest water holding capacity_________?

28 / 50

The lands which are rich in soluble salts and exchangeable sodium:

29 / 50

Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

30 / 50

Which chemical used to prevent evaporation from surface of water in water bodies?

31 / 50

Accumulation of soluble salts root zone is known as________?

32 / 50

Rocks having coarse bubble holes are called___________?

33 / 50

Micas have isomorphous substitution:____________?

34 / 50

?Soil? word derive from which language?

35 / 50

International atomic weight of potassium is_________________?

36 / 50

When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as___________________?

37 / 50

Examples of macrobiota are__________?

38 / 50

Depending on the percentage of sand, silt, clay, soils are divided into _______ textural classes:

39 / 50

The formula used for calculating RSC is _________?

40 / 50

_________refers to the increase in density of a soil as a result of applied load or pressure?

41 / 50

Thick concordant bodies which force the overlying sediments to form dome-shaped hills are called_________?

42 / 50

C:N ratio of microorganism:

43 / 50

The indicator used for the the estimation of the organic matter or organic carbon is;_________?

44 / 50

Gravimetric water is present in__________________?

45 / 50

The soils most prone to structural crusts are those which are higher in_________?

46 / 50

The nutrient element silicon (Si) is:_________?

47 / 50

The soil quality is always deteriorated by:_________?

48 / 50

Humic acid is soluble in__________?

49 / 50

1 bar is equal to_________?

50 / 50

Specific heat is higher in:

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