How many type of soil colloids?

A. 4
B. 2
C. 6
D. 5

Submitted by: Sherjan Nazir

Related Mcqs:

Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have ________________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:
A. Extremely low
B. Extremely high
C. Very little
D. None of these
Submitted by: Shafiq Rehman
The internal & external surfaces of soil colloids are positively and or negatively charged. Mostly ____________ is dominant:
A. Positive
B. Negative
C. Zero
D. All of the above
Submitted by: Shafiq Rehman
Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:
A. Mull
B. Mulch
C. Mycorrhizae
D. Muck
Submitted by: Shafiq Rehman
Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:
A. Soil amendment
B. Soil conditioner
C. Both a & b
D. None of the above
Submitted by: Shafiq Rehman
A soil is classified as sodic soil when______________________?
A. EC is 8.5
C. SAR is >13
D. All the above
Organic P content in soil, by ignition method is estimated by igniting the soil at ____________________?
A. 250ºC
B. 1000ºC
C. 550ºC
D. 1250ºC
Being a soil scientist, do you know which is the popular book of soil science of Nyle.C.brady, 14th edition available in markets:
A. Fundamentals of soil
B. Essenttials of soil sciences
C. The nature and properties of soil
D. The mechanics of soil
Submitted by: Shafiq Rehman
The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo?
A. N, P, K
B. Ca, Mg, S
C. both A & B
D. The above statement is wrong
Submitted by: Shafiq Rehman
Pedogenic processes bring about changes in the parent materials in the form of _____________________, within the soil body (soil profile)?
A. Additions, losses
B. Transfers and transformations
C. both A and B
D. None of the above
Submitted by: Shafiq Rehman
Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:
A. Acid rain
B. Neutral rain
C. Both A & B
D. None of the above
Submitted by: Shafiq Rehman