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Soil Science Quiz 6

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Soil Science Quiz 6

1 / 50

The soils in which the weathered material is taken away to other place by several agents are called__________?

2 / 50

Percentage of N in Ammonium ritract fertilizer is___________________?

3 / 50

The available from of nitrogen for plant is________________?

4 / 50

The wearing away of the land surface by wind, water, ice or other geological agents is called________?

5 / 50

Some times, AB/EB/BA/BE horizons in soil profile are present which are called__________?

6 / 50

Geochemical weathering processes occurs__________?

7 / 50

Organic (O) horizon is absent in_________?

8 / 50

The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth?s crust is_________?

9 / 50

The water loss through transpiration from vegetative and evaporation from soil surface is known as__________________?

10 / 50

The kind, rate and intensity and pedogenic processes are controlled by ________ ,soil-forming factors?

11 / 50

Urea in manufactured form gases____________?

12 / 50

If a manure pile is exposed to the rain, what nutrient will be lost the most ?

13 / 50

Main product of photosynthesis is_________?

14 / 50

Inorganic constituents vary in size from fine clay particles _________ mm to large _________ mm gravel and rock:

15 / 50

Felsic rocks consists of___________________?

16 / 50

According to WAPDA, the ECe of the salt free soil should remain__________________?

17 / 50

Systematic examination of soil in the field and laboratories, their description and grouping according to classification system:

18 / 50

Source of negative charges on silicate clays is/ are________?

19 / 50

A soil is categorized as saline when EC of saturation extract is__________?

20 / 50

Which of the following crops is most tolerant to salty soils?

21 / 50

Color off basic matic rock is_________?

22 / 50

Which nutrients are immobile in plants?

23 / 50

Volcanic soils:

24 / 50

Organic Soils are classified as ____________ and are also known as ____________ soils:

25 / 50

Acid soil contain pH________?

26 / 50

An intrazonal group of dark calcareous soils high in clay and having mainly montmorillonitic type clay are called as:________?

27 / 50

Schist is example of________?

28 / 50

The symbol of Na stands for___________________?

29 / 50

The largest soil order in Pakistan?

30 / 50

Being a soil scientist, do you know which is the popular book of soil science of Nyle.C.brady, 14th edition available in markets:

31 / 50

Rocks formed from molten magma are called__________________?

32 / 50

Aridisols cover the largest in Pakistan_______?

33 / 50

Most abundant mineral in the earth crust is__________?

34 / 50

One ha cm of water is equal to__________?

35 / 50

A group of soils with same parent material but located at different positions of slope?

36 / 50

Soil structure without aggregation is known as________?

37 / 50

pH in coniferous forest is__________________?

38 / 50

following are types of weathering:

39 / 50

Gold is___________________?

40 / 50

Following are types if erosion:

41 / 50

The complex fertilizer Nitrophos available in the market contains_________?

42 / 50

Soil water can be determined by_________?

43 / 50

An ion or molecule in the coordination sphere central ion is called__________________?

44 / 50

Gravimetric water is present in__________?

45 / 50

Which mulch reduce soil temperature?

46 / 50

The credit for identifying the essentality of nitrogen to plants goes to________?

47 / 50

The exact chemical formula of DAP fertilizer is___________________?

48 / 50

Which one of the following clay mineral has the highest CEC?

49 / 50

Algal photosynthesis increases pH of water and releases___________________?

50 / 50

The particlesw density of a mineral soil is about________?

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