Soil Science Quiz 8
1 / 50
_________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.
2 / 50
Mineral soil contain organic carbon___________________?
3 / 50
Which element is known as chemical police man of plant?
4 / 50
A soil is classified as sodic soil when__________?
5 / 50
Peat soils are not present in Pakistan because these are formed in___________?
6 / 50
The deficient level of N (%) in plants suggested by various workers is________?
7 / 50
Chitin and steroids are_________?
8 / 50
Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?
9 / 50
The available form of sulphur for plant is___________________?
10 / 50
Weathering is___________?
11 / 50
The chemical formula of Dolomite is________________?
12 / 50
Which bacteria convert nitrite to nitrate___________________?
13 / 50
Places where volcanoes occur are_________________?
14 / 50
Weathering is the natural process of__________?
15 / 50
Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:
16 / 50
How much percentage of soils of Pakistan are deficient in P__________?
17 / 50
A mineral horizon that is either too thin, too light in colour, too low in organic matter:
18 / 50
Age of Earth is_________?
19 / 50
Rocks formed from compacted clay or mud are called________?
20 / 50
Soil Organic Matter (SOM) which consists of about _______ % organic carbon plays a vital role by providing macro & micro nutrients:
21 / 50
Who consider the various properties of soil in relation to plant production?
22 / 50
Ligands that occur in Pakistan soils are__________________?
23 / 50
During decomposition of organic matter, inititial decomposition is dominated by:__________?
24 / 50
Fine-graned rocks formed on earth crust are called________?
25 / 50
The tension of the water at the upper plastic limit is equivalent to pF value:
26 / 50
A treeless artic plain is called as___________________?
27 / 50
Vertical movement of water was studied by_________________?
28 / 50
Metamorphic rocks are classified into:___________?
29 / 50
Which chemical used to prevent evaporation from surface of water in water bodies?
30 / 50
Granite and Basalt are examples of:___________?
31 / 50
Which one of the following is physical property of soil__________?
32 / 50
Which one of the following techniques is used for assessing available P in soil and does not include growing plants:
33 / 50
Particular matter consists of________?
34 / 50
In low-rainfall areas, huge shifting sand dunes are commonly found, particularly near human habitations. Techniques of afforesting the shifting dunes needed to be implemented. These techniques consist of___________?
35 / 50
Which of the following nutrient elements are regarded as energy exchangers:
36 / 50
Perfect hardness of any mineral is determined by___________________?
37 / 50
Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?
38 / 50
The problem of soil crosion Thal and Cholistan is predominantly due to___________________?
39 / 50
Organic matter in Pakistani soils is generally:_________?
40 / 50
Losses of soil water not includes_________?
41 / 50
Causes of Soil are:__________?
42 / 50
Which of the following fertilizers show maximum residual acidity with the continuous soil application:
43 / 50
Physical condition of soil for plant growth is called___________________?
44 / 50
The term applied to a material which tends to absorb moisture from the atmosphere is called__________________?
45 / 50
Sugar cane is_________?
46 / 50
Planets in our system are________?
47 / 50
Integrated Nutrient Management (INM) is a well-accepted approach for the sustainable management of________?
48 / 50
What kind of nitrogenous (N) fertilizers should not be used for flooded soil:
49 / 50
1 mg of H+ will be equal to_________?
50 / 50
hydrosphere refers to__________?
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