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Soil Science Quiz 1

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Soil Science Quiz 1

1 / 50

The basic form of present day Universal soil loss equation (USLE), initially involved the use of factors such as ________?

2 / 50

Transportation & cementation of primary rocks:

3 / 50

Lithosphere refers to________?

4 / 50

The seventieth element included in the list of essential nutrient element is:__________?

5 / 50

Material deposited by the wind is called________?

6 / 50

Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?

7 / 50

Boron concentration is irrigation water is considered safe only upto_________________?

8 / 50

The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?

9 / 50

Structure and size of aphantic rock is________________?

10 / 50

Fe, Zn, Mn, Mo, Co, Ni, Cu, are also called __________:

11 / 50

Equation of Ozone is____________?

12 / 50

Which rock is harder_________________?

13 / 50

Rate of entry of water in soil is__________?

14 / 50

Potassium (K) fixation capacity is maximum in:____________?

15 / 50

Conservation agriculture improves the water use efficiency of dryland systems. It has components:

16 / 50

Which soil is suitable for nce________________?

17 / 50

Which element is found highest in earth crust?

18 / 50

The process of deposition of soil materials in the lower layer is termed as:_________?

19 / 50

The water diffusivity has the units of:__________?

20 / 50

What is the concentration of pure water?

21 / 50

Buffer solution is a solution which resist change in __________________ ?

22 / 50

The safe limit of No2 in drinking water is_________?

23 / 50

In land capability classification, class I-Iv are suitable for:_________?

24 / 50

A set of soils with same parent material, topography, climate and biota but different age is called_________?

25 / 50

The mineral component of soil consists of_________?

26 / 50

Essentiality criteria of an element :

27 / 50

Permanente wilting point of clayey soils is not less than________?

28 / 50

Soil erosion Occurs mainly in:_________?

29 / 50

The process by which nutrients chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil:

30 / 50

The site of grains present in sands structuring range__________________?

31 / 50

Most common rocks, after exposed to weathering which cover about ______% 0f the earth:

32 / 50

__________ particles range in diameter between 0.02 to 0.002 mm:

33 / 50

Which one of the following are macro nutrients__________________?

34 / 50

Corrositivity of water is an indication of___________________?

35 / 50

Clear water with organic matter or sediment and minimum biological activity is known as__________________?

36 / 50

Elements essentially required for growth of all plants species are___________________?

37 / 50

Nitrification is the microbial conversion of________?

38 / 50

Mollic refers to________?

39 / 50

The soil air contains a number of gases ______________ & water vapours:

40 / 50

Kaolinite can be identified by__________?

41 / 50

Most of the productive soils in Pakistan have pH__________?

42 / 50

Igneous rock whose crystal is 1 cm called________?

43 / 50

Although some acid soils do exist in the northern mountainous regions of Pakistan (Mansehra, Sawat, Dir). Almost all cultivated soils of the country are ________________, with high base saturation and low organic matter content (generally less than 1%)?

44 / 50

Permanent change in soil is due to__________________?

45 / 50

The resistance of a soil at various moisture contents to mechanical stresses or manipulations:

46 / 50

The little clay mineral is_________?

47 / 50

About 40% of the total area of Pakistan is affected by wind erosion. this includes:_________?

48 / 50

Water is the major constituent of all living creatures. Biomass of plants is composed of ________% water:

49 / 50

A compound toxic to crop formed by the thermal decomposition of urea is_________________?

50 / 50

Product of microorganism that appears to chelate calcium is called_________?

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