Soil Science Quiz 4
1 / 50
The atmospheric layer lies closest to the earth surface is known as___________________?
2 / 50
According to one estimate, wind and water erosion over ______ % of the Pakistan?s total area?
3 / 50
The exact formula for calculating the base saturation percentage is_________?
4 / 50
Which leaf of rice is sampled for tissue nutrient analysis?
5 / 50
Who gave the defination of humic acid ?
6 / 50
The very high temperatures required for ICP-AES are attained by__________?
7 / 50
Oxygen and Silicon together comprise approximately ______ %of the earth crust?
8 / 50
The credit for identifying the essentality of K, Ca, Mg and P to planta goes to________?
9 / 50
Potassium (K) occurs as a constituent of the earth?s crust in the proportion of_________?
10 / 50
The time for which water and ion remains in vicinity is called_________?
11 / 50
The capacity of a soil to function on sustained basis promoting plant & animal health:
12 / 50
International Union of Soil Sciences?(IUSS),?founded?in___________?
13 / 50
Common soils found in Pakistan are___________________?
14 / 50
The unit of electrical conductivity is________?
15 / 50
The term rhizosphere was coined by:___________?
16 / 50
Which of the following statement is wrong regarding, Soil ____________?
17 / 50
Soils that have more than 20% organic matter are termed as organic soils. These are also called:________?
18 / 50
The configuration of a surface and the relations among its man-made and natural features is called:________?
19 / 50
Size of clay particle is___________________?
20 / 50
In Pakistan, Nitrophos is manufactured in_________?
21 / 50
The Tree sends down roots from its branches to the soil is known as:___________?
22 / 50
The molar mass of NaCl is_________?
23 / 50
Soil is a mixture of__________?
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
Process of mixing soil by fauna and flora is called__________________?
27 / 50
The nutrient particularly influencing root growth is___________________?
28 / 50
The moisture content below which a cohesive soil does stick to metal tools is known as__________?
29 / 50
The dominance of acidity creates toxicity?
30 / 50
Availability of Zn is higher to crops in:_________?
31 / 50
The marble is a__________?
32 / 50
What is a soil horizon?
33 / 50
Antioxidant is used to reduce the process of_________?
34 / 50
The science of growing terrestrial plants in an aerated solution is known as___________________?
35 / 50
Soil erosion is __________ of soil from one place ti another place by natural agencies (wind & water):
36 / 50
The device used for the measurement of positive pressure potential of soil water is known as_________________?
37 / 50
Fe is trivalent in which of the chemical compound:
38 / 50
The most suitable species for reclamation of sandy soils is:_________?
39 / 50
There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?
40 / 50
Specific heat of organic matter is______?
41 / 50
The suitable species for reclamation of saline & sodic soil is:__________?
42 / 50
The maximum amount of water which a soil can hold after free drainage has ceased is called as_______?
43 / 50
Examples of micro biota are________?
44 / 50
While handing concentrated acids. bases or other hazardous chemicals use_________________?
45 / 50
Examples of prismatic structures are found in the _______________ mapped in KPK and the northern part of Punjab.
46 / 50
Soil samples are collected:
47 / 50
The net reaction of photosynthesis is_________?
48 / 50
The exact formula for sodium hexametaphosphate is___________________?
49 / 50
Chromium (Cr) is a________?
50 / 50
The following types of check dams have been tried in Pakistan:
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