CSS Agriculture Questions & Answers - Part-2 - Set 14

1)   Nitrogen, phosphorous, potassium, calcium, magnesium and sulphur, which are used by plants in relatively large quantities, are referred to as:

a. Macro nutrients
b. Micro nutrients
c. Trace nutrients
d. Bulk nutrients
Answer  Explanation 

ANSWER: Macro nutrients

Explanation:
No explanation is available for this question!


2)   Nitrogenous fertilizer's are classified into:

a. Two groups
b. Three groups
c. Four groups
d. None of the above
Answer  Explanation 

ANSWER: Four groups

Explanation:
No explanation is available for this question!


3)   Non-humic substances are less complex and are _____ to microbial attack than those belonging to humic group:

a. More resistant
b. Less resistant
c. More susceptible
d. Less susceptible
Answer  Explanation 

ANSWER: Less resistant

Explanation:
No explanation is available for this question!


4)   Non-symbiotic bacteria fixes _______ amount of N2 than symbiotic N2 fixers:

a. Less
b. More
c. Equal
d. Not known
Answer  Explanation 

ANSWER: Less

Explanation:
No explanation is available for this question!


5)   Nutrient index is used to prepare the:

a. Soil productivity map
b. Soil fertility map
c. Both of the above
d. None of the above
Answer  Explanation 

ANSWER: Soil fertility map

Explanation:
No explanation is available for this question!


6)   Nutrient absorbed by plants are carried upward through the:

a. Xylem
b. Phloem
c. Both (a) & (b)
d. None of these
Answer  Explanation 

ANSWER: Xylem

Explanation:
No explanation is available for this question!


7)   Occurrence of quartz, in high amounts makes a rock:

a. Hard
b. Soft
c. Alkaline
d. Acidic
Answer  Explanation 

ANSWER: Acidic

Explanation:
No explanation is available for this question!


8)   Olsen method of P determination is more effective in:

a. Acidic soil
b. Alkaline ail
c. Normal soils
d. None of these
Answer  Explanation 

ANSWER: Alkaline ail

Explanation:
No explanation is available for this question!


9)   On the basis of pH measurements, the nearly neutral soils have pH value between:

a. 6.0 to 6.5
b. 6.6 to 7.5
c. 7.5 to 8.5
d. 5.0 to 6.0
Answer  Explanation 

ANSWER: 6.6 to 7.5

Explanation:
No explanation is available for this question!


10)   On the basis of total mass, the relative abundance of the given elements in the earth's crust is such that:

a. Si > O2 > Fe = Al
b. O2 > AI > Sl > Fe
c. O2 > Si > Fe > Al
d. O2 > Si > Al > Fe
Answer  Explanation 

ANSWER: Si > O2 > Fe = Al

Explanation:
No explanation is available for this question!


11)   Organic carbon content in the soil is a measure of:

a. Available potassium
b. Available phosphorus
c. Available nitrogen
d. Available magnesium
Answer  Explanation 

ANSWER: Available nitrogen

Explanation:
No explanation is available for this question!


12)   Organic matter contains about ______ percent organic carbon:

a. 32
b. 18
c. 68
d. 58
Answer  Explanation 

ANSWER: 58

Explanation:
No explanation is available for this question!


13)   Organic matter content of 'histosols' and "hydromorphic" soils is:

a. 30-40%
b. 50-57%
c. 60-70%
d. 12 - 18%
Answer  Explanation 

ANSWER: 60-70%

Explanation:
No explanation is available for this question!


14)   Organism used as biofertilizer in wheat cultivation:

a. Azotobacter
b. Rhizobium
c. Nostoc
d. All of these
Answer  Explanation 

ANSWER: Azotobacter

Explanation:
No explanation is available for this question!


15)   Oxidation of sulfure to sulphate is carried out by:

a. Bacillus spp
b. Aspergillus spp
c. Azotobacter spp
d. Thiobacillus spp
Answer  Explanation 

ANSWER: Thiobacillus spp

Explanation:
No explanation is available for this question!


16)   Oxygen requirement of the plant is met by absorbing:

a. Respiration
b. Transpiration
c. Photosynthesis
d. Chlorophyll formation
Answer  Explanation 

ANSWER: Respiration

Explanation:
No explanation is available for this question!


17)   Peat soils are ______ in nature:

a. 5 - 8%
b. 10-40%
c. 50-55%
d. 60-65%
Answer  Explanation 

ANSWER: 50-55%

Explanation:
No explanation is available for this question!


18)   Peat soils have _____ organic matter:

a. 5 - 8%
b. 10-40%
c. 50-55%
d. 60-65%
Answer  Explanation 

ANSWER: 10-40%

Explanation:
No explanation is available for this question!


19)   Pedology is the study of:

a. Rocks
b. Soils
c. Nutrient management
d. Crop production
Answer  Explanation 

ANSWER: Soils

Explanation:
No explanation is available for this question!


20)   Percent nitrogen is equal to:

a. Percent organic matter x 5
b. Percent organic matter x 0.05
c. Percent of organic matter x 0.06
d. None of the above
Answer  Explanation 

ANSWER: Percent organic matter x 0.05

Explanation:
No explanation is available for this question!


21)   Percent of total N present in soil is in the form of organic N:

a. 95.99
b. 40.8
c. 100
d. 20
Answer  Explanation 

ANSWER: 95.99

Explanation:
No explanation is available for this question!


22)   Percentage of soil solids in soil is:

a. 30%
b. 40%
c. 50%
d. 60%
Answer  Explanation 

ANSWER: 50%

Explanation:
No explanation is available for this question!


23)   pH value of 7.0 denotes that the soil reaction is:

a. Acidic
b. Alkaline
c. Neutral
d. High alkaline
Answer  Explanation 

ANSWER: Neutral

Explanation:
No explanation is available for this question!


24)   Phosphates enzyme play a major role in ______ of organic phosphates in soil:

a. Adsorption
b. Mineralization
c. Immobilization
d. None of these
Answer  Explanation 

ANSWER: Mineralization

Explanation:
No explanation is available for this question!


25)   Phosphorous occurs in soil in:

a. Inorganic form only
b. Organic form only
c. Both (a) & (b)
d. None of these
Answer  Explanation 

ANSWER: Both (a) & (b)

Explanation:
No explanation is available for this question!


26)   Phosphorus fixation refers to the phenomenon of:

a. Absorption of P2O5 by plant
b. Leaching of P2O5 from soil by percolating waters
c. Conversion of soluble phosphorus into plant unavailable forms
d. Anion exchange with colloidal constituents of soil
Answer  Explanation 

ANSWER: Conversion of soluble phosphorus into plant unavailable forms

Explanation:
No explanation is available for this question!


27)   Phosphorus is esential for:

a. Cell division
b. Development of meristematic tissues
c. Both of these
d. None of these
Answer  Explanation 

ANSWER: Both of these

Explanation:
No explanation is available for this question!


28)   Physical weathering causes:

a. Alternation of rocks and minerals
b. Disintegration of rocks and minerals
c. Decomposition of rocks and minerals
d. Synthesis of rocks and minerals
Answer  Explanation 

ANSWER: Disintegration of rocks and minerals

Explanation:
No explanation is available for this question!


29)   Plants meet their oxygen requirement by:

a. Breakdown of water in the plant body
b. Absorbing oxygen from air
c. Absorbing oxygen from soil
d. All the above methods
Answer  Explanation 

ANSWER: All the above methods

Explanation:
No explanation is available for this question!


30)   Poor quality water contains:

a. Higher amount of soluble salts
b. Lower amount of soluble salts
c. Higher amount of calcium
d. None of the above
Answer  Explanation 

ANSWER: Higher amount of soluble salts

Explanation:
No explanation is available for this question!


31)   Potassium fixation is higher in:

a. 1:1 type clays
b. 2:1 type clays
c. Oxide of Fe and Al
d. None of the above
Answer  Explanation 

ANSWER: 1:1 type clays

Explanation:
No explanation is available for this question!


32)   Potassium is considered vital in:

a. Synthesis of protein and amino acids
b. Photosynthetic activity of leaves
c. Movement of manufactured food from leaves to root
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


33)   Process of immobilization refers to:

a. Conversion of inorganic form to organic form
b. Conversion of organic form to inorganic form
c. Conversion of N-compound to protein
d. None of the above
Answer  Explanation 

ANSWER: Conversion of inorganic form to organic form

Explanation:
No explanation is available for this question!


34)   Q = KA (P1-P1)/n1 denotes the:

a. Fick's law of diffusion
b. Stoke's law of velocity of particle falling
c. Darcy's equation of gas flow
d. None of these
Answer  Explanation 

ANSWER: Darcy's equation of gas flow

Explanation:
No explanation is available for this question!


35)   Q = Ki is the ______ equation:

a. Darcy's equation
b. Fick's law
c. Both
d. None of these
Answer  Explanation 

ANSWER: Darcy's equation

Explanation:
No explanation is available for this question!


36)   Radioactive tracer technique is used for determining:

a. Translocation of minerals in plants
b. Cations exchange capacity of soil
c. Both these
d. None of these
Answer  Explanation 

ANSWER: Translocation of minerals in plants

Explanation:
No explanation is available for this question!


37)   Which one of the following organic matter has the narrowest C/N ratio?

a. Mustard
b. FYM
c. Compost
d. Groundnut cake
Answer  Explanation 

ANSWER: Compost

Explanation:
No explanation is available for this question!


38)   Refers to the study of the origin of soils in there natural environment, its classification and description:

a. Edaphology
b. Pedology
c. Geology
d. None of the above
Answer  Explanation 

ANSWER: Pedology

Explanation:
No explanation is available for this question!


39)   Refers to the study of the soil properties in relation to crop production:

a. Soil taxonomy
b. Geology
c. Pedology
d. Edaphology
Answer  Explanation 

ANSWER: Edaphology

Explanation:
No explanation is available for this question!


40)   Refers to the upper most biochemical weathered portion of the regolith:

a. Soil
b. Earth
c. Rock
d. None of the above
Answer  Explanation 

ANSWER: Soil

Explanation:
No explanation is available for this question!


41)   Release of nutrients like nitrogen, phosphorus and sulphur from the added organic matter by M.O. at the initial stage of degradation will depend upon:

a. Soil pH
b. Soil temperature
c. Chemical composition of added organic matter
d. Method of incorporation
Answer  Explanation 

ANSWER: Chemical composition of added organic matter

Explanation:
No explanation is available for this question!


42)   Rhizobia infect the host legumes through:

a. Eqidermal cells
b. Cortex cells
c. Root bairs
d. All of the above
Answer  Explanation 

ANSWER: Root bairs

Explanation:
No explanation is available for this question!


43)   Rhizobium after infection converts to a form, which is irregular in shape and is called:

a. Spore
b. Cyst
c. Bacteriod
d. None of the above
Answer  Explanation 

ANSWER: Bacteriod

Explanation:
No explanation is available for this question!


44)   Rhizohium culture is used to increase biological nitrogen fixation in:

a. Pulse crops
b. Cereals crops
c. Oilseeds
d. Cotton
Answer  Explanation 

ANSWER: Pulse crops

Explanation:
No explanation is available for this question!


45)   Rhizobium japonicum can fix the nitrogen in the roots of:

a. Soyabean
b. Cowpea
c. Beans
d. Lentil
Answer  Explanation 

ANSWER: Soyabean

Explanation:
No explanation is available for this question!


46)   Rhizobium leguminoserum can fix the nitrogen in the roots of:

a. Alfalfa, Sweet clover
b. Clovers
c. Pea, Sweetpea, lentil
d. Beans
Answer  Explanation 

ANSWER: Pea, Sweetpea, lentil

Explanation:
No explanation is available for this question!


47)   Rhizobium phaseoli can fix the nitrogen in the roots of:

a. Lentil
b. Soyabean
c. Pea
d. Bean
Answer  Explanation 

ANSWER: Bean

Explanation:
No explanation is available for this question!


48)   Rhizobium sp fix atmospheric nitrogen:

a. As symbiouts on whet
b. As symbiouts on cucumber
c. As symbiouts on pulses
d. In free soil
Answer  Explanation 

ANSWER: As symbiouts on pulses

Explanation:
No explanation is available for this question!


49)   Rhizobium trifolii can fix the nitrogen in the roots of:

a. Sweet clover
b. Clover
c. Lupines
d. Soyabean
Answer  Explanation 

ANSWER: Clover

Explanation:
No explanation is available for this question!


50)   Rhizosphere refers to the small area:

a. Around the root
b. On the root
c. Near the primary root
d. All of the above
Answer  Explanation 

ANSWER: Around the root

Explanation:
No explanation is available for this question!