What civil engineers called soil?
A. Soil
B. Land
C. Earth
D fragmented rock
Soil Science
In alkaline soil which form of phosphorus uptake by plants?
In alkaline soil which form of phosphorus uptake by plants?
A. Primary orthophosphate
B. Secondary orthophosphate
C. both
D. None of these
In acidic soil which form of phosphorus uptake by plants?
In acidic soil which form of phosphorus uptake by plants?
A. Primary orthophosphate
B. Secondary orthophosphate
C. Both
D. None of these
In which form plant uptake phosphorus?
In which form plant uptake phosphorus?
A. H2po4
B. HPO4-2
C. Both
D. Non of these
The forest soils have lower bulk density than agricultural soils because of their ______ content.
The forest soils have lower bulk density than agricultural soils because of their ______ content.
A. High organic matter
B. Low organic matter
C. Both a & b
D. None of these
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:
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
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:
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
Nutritive elements needed in large quantities to ensure normal plant development:
Nutritive elements needed in large quantities to ensure normal plant development:
A. N, P, K
B. S, Mg, Ca, Fe
C. Both a & b
D. None of a & b
Essentiality criteria of an element :
Essentiality criteria of an element :
A. In the absence of an element, its not possible for plant to complete its vegetative cycle.
B. The role played by an element is specific & can not be replaced by another element.
C. The element is directly involved in the nutrition of the plant.
D. All of these
In land capability classification, class I-Iv are suitable for:_________?
In land capability classification, class I-Iv are suitable for:_________?
A. Suitable for grazing
B. Suitable for forestry
C. Unsuitable for any agricultural use
D. Suitable for cultivated farming