A good crop of potato yielding about 400 q/ha on an average removes _______ N + P2O5 + K2O kg/ha, respectively:
A.170-180 + 100 + 250
B.170-180 + 25 + 250
C.170-180 + 50 + 125
D.170-180 + 25 + 100
Category: Agriculture Engineering Mcqs
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Which of the following habitats is most unsuitable for primary productivity:
A.Meadow
B.Forested river bank
C.Cave
D.Pond
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because all of them:
A.Aid in regulating metabolism
B.Are proteins
C.Are synthesized within the body
D.Enhance the oxidative metabolism
Black scale insect of citrus is controlled by:
A.Metaphycus loundsbury
B.Rodolia cardinalis
C.Both of them
D.None of them
At the molecular level point mutations are due to:
A.Destruction of the bases
B.Destruction of the double helix
C.Shifting of a portion of the helix and bases
D.Alterations of sequences of base in DNA
The anti-knock quality of petrol fuel is determined by:
A.Cetane number
B.Octane number
C.Both (a) & (b)
D.None of these
The incorporation of minerals by microbes is called:
A.Mineralization
B.Humification
C.Nutrient immobilization
D.Microbe immobilization
According to land capability classification, the soils, which are not suitable for crop cultivation, belong to:
A.Class I
B.Class III
C.Class IV
D.Class VIII
Oil rings on the piston are located:
A.Below the compression ring
B.Above the piston skirt
C.Above the compression ring
D.Both (a) & (b)
The specific gravity of fuel is measured by:
A.Hygrometer
B.Thermometer
C.Hydrometer
D.All are correct
