Soil Science Quiz 1
1 / 50
Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?
2 / 50
Which soil is suitable for nce________________?
3 / 50
Transportation & cementation of primary rocks:
4 / 50
Boron concentration is irrigation water is considered safe only upto_________________?
5 / 50
The water diffusivity has the units of:__________?
6 / 50
The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?
7 / 50
Product of microorganism that appears to chelate calcium is called_________?
8 / 50
Conservation agriculture improves the water use efficiency of dryland systems. It has components:
9 / 50
The safe limit of No2 in drinking water is_________?
10 / 50
The process of deposition of soil materials in the lower layer is termed as:_________?
11 / 50
Material deposited by the wind is called________?
12 / 50
About 40% of the total area of Pakistan is affected by wind erosion. this includes:_________?
13 / 50
Corrositivity of water is an indication of___________________?
14 / 50
Equation of Ozone is____________?
15 / 50
Igneous rock whose crystal is 1 cm called________?
16 / 50
A compound toxic to crop formed by the thermal decomposition of urea is_________________?
17 / 50
Fe, Zn, Mn, Mo, Co, Ni, Cu, are also called __________:
18 / 50
Mollic refers to________?
19 / 50
Which rock is harder_________________?
20 / 50
A set of soils with same parent material, topography, climate and biota but different age is called_________?
21 / 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%)?
22 / 50
Elements essentially required for growth of all plants species are___________________?
23 / 50
Clear water with organic matter or sediment and minimum biological activity is known as__________________?
24 / 50
In land capability classification, class I-Iv are suitable for:_________?
25 / 50
The resistance of a soil at various moisture contents to mechanical stresses or manipulations:
26 / 50
Buffer solution is a solution which resist change in __________________ ?
27 / 50
What is the concentration of pure water?
28 / 50
Lithosphere refers to________?
29 / 50
The little clay mineral is_________?
30 / 50
The seventieth element included in the list of essential nutrient element is:__________?
31 / 50
Kaolinite can be identified by__________?
32 / 50
Permanente wilting point of clayey soils is not less than________?
33 / 50
The soil air contains a number of gases ______________ & water vapours:
34 / 50
Essentiality criteria of an element :
35 / 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:
36 / 50
The site of grains present in sands structuring range__________________?
37 / 50
Which element is found highest in earth crust?
38 / 50
Most of the productive soils in Pakistan have pH__________?
39 / 50
Structure and size of aphantic rock is________________?
40 / 50
__________ particles range in diameter between 0.02 to 0.002 mm:
41 / 50
Which one of the following are macro nutrients__________________?
42 / 50
The mineral component of soil consists of_________?
43 / 50
Most common rocks, after exposed to weathering which cover about ______% 0f the earth:
44 / 50
Permanent change in soil is due to__________________?
45 / 50
The basic form of present day Universal soil loss equation (USLE), initially involved the use of factors such as ________?
46 / 50
Nitrification is the microbial conversion of________?
47 / 50
Rate of entry of water in soil is__________?
48 / 50
Potassium (K) fixation capacity is maximum in:____________?
49 / 50
Soil erosion Occurs mainly in:_________?
50 / 50
Water is the major constituent of all living creatures. Biomass of plants is composed of ________% water:
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