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Agronomy-10

Q.1
Gypsum is commonly used for reclamation of_________.

Saline
Sodic soil
Acidic soil
All of these


Q.2
Unit of measuring electrical conductivity is__________.
Micro- gram/sq.cm
Angstran/cm.
Millimhos/cm
None of these


Q.3
Which of the following soil control measures is a mechanical measure?
Stubble cropping
Green manuring
Strip cropping
Basin listing


Q.4
Soil erosion of mostly affected by_________.
Rainfall intensity
Rainfall variability
Rainfall erosivity
Total annual rainfall


Q.5
Tillage is most important to crop production because it________.
Destroy soil structure
Prepares a good seed bed
Improved soil colour
Increase the acidity of the soil


Q.6
A green manure crop would_______.
Lower water penetration
Decrease aeration
Increase nitrogen content
None of the above

Q.7
Micro organism such as bacteria and fungi are useful in the soil because they_________.

Are fed by plant
Remove carbon dioxide
Increase pore space
Decay organic matter


Q.8
Inter-culture operation are meant for__________.
Rouging
Destroying weeds
Thinning
Maintaining plant stand


Q.9
The main objective of intercultivation is to_________.
Conserve soil moisture
Increase aeration
Control weeds
Increase water holding capacity


Q.10
which of the following developments has helped in the success of "Zero tillage "?
Insecticides
Herbicides
Fungicides
Soil amendment


Q.11
The difference between photosynthesis and respiration which is referred as___________.
Crop growth rate
Net assimilation
Relative growth rate
None


Q.12
The optimum temperature range for germination of most seeds is___________degree C.
20-25
15-30
25-30
None


Q.13
A fraction of the biological yield which is useful to mankind is known as___________.
Biological yield
Harvest index
Economic yield
Grain yield


Q.14
Inverse yield nitrogen law proposed by__________.
Wilcox
Von Liebig
Black man
Mitscherlich


Q.15
__________is the cheaper and long lasting source of carbon dioxide.
Dry ice
CaCo3
Water
Organic matter


Q.16
In a situation with different levels of plant population where the seeds per inflorescence and size of seeds are more resulting in higher yield..
Low population density
Moderately dense stands
Extreme dense stands
None


Q.17
Plant lose about_________percent of the absorbed water just to maintain the optimum temperature .
65
75
80
70


Q.18
Baul unit indicate the amount of nutrient that when added result in moving yield_________way closer to maximum possible yield.
One half
One third
One fourth
None


Q.19
Leaf orientation/ angle exceeds 60o intercept maximum sun light is known as_________.
Errectophile
Planophile
Plagiophile
Both A & B


Q.20
____________is one factor under which many environment is limiting and cannot be supply artificially to the crop.
Nutrient
Water
Co2
Solar radiation


Q.21
The organic matter content in arid sandy soils is____________%.
> 1
< 1
>2
1-2


Q.22
High temperature influence sex ratio in flower in__________crop.
Maize
Castor
Pearl mill ate
Cotton


Q.23
Expansion of the leaf blades is maximum in__________portion of the spectrum.
Orange-red
Blue violet
Infra red
Ultra violet


Q.24
Relative humidity and wind velocity are inter related and have___________relationship.
Negative
Positive
Antagonistic
None of above


Q.25
Water is main constituent of the protoplasm comprising up to about_________% of its total weight.
80-85
90-95
70-75
60-70

Number of score out of 25 = Score in percentage =


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