100 Agronomy One Liner Questions for UAF entry Test Preparation Part-5

100 Agronomy One Liner Questions for UAF entry Test Preparation Part-5
100 Agronomy One Liner Questions for UAF entry Test Preparation Part-5

100 Agronomy One Liner Questions. 100 Agronomy One Liner Questions for Entry Test Preparation. 100 Agronomy One Liner Questions for M.Sc Students. 100 Agronomy One Liner Questions for Ph.D. students

StatementAnswer
Poor plant productivity on the acid soils is due to the__________________Al toxicity
Mn toxicity
Excess of H ions (All of the given options)
Chlorophyll absorbs the light at the_______________0.67 micrometer
Brady rhizobium is the……………….in nature.Symbiotic
…………. bacteria are called to produce the vitamin B.Azotobacter
Trichoderma is the_____________________Root pathogen
………….are responsible for the converting fixed P into the available P.AMF
……………reactions are responsible for the developing brown color of the residues.Oxidation and polymerization
Higher clay content will cause the_______________Lower mineralization
Excess of the N will………….the availability of the P.Decrease
Sometimes increase and sometimes decrease the ………….uptake is less affected by the competition between the neighboring roots.Phosphate
Concentration of the micronutrients (Fe, Cu, Mn, Zn) in the soil solution depends upon the________________Soil OM contents
Soil pH
Soil redox potential (All the three given options)
Under the submerged & flooded conditions, the whole system is the____________Reduced
Organic matter decomposition & mineralization decreases under the flooded conditions up to the_______________Twenty%
Phosphorous availability will………. under the flooded conditions.Increases
The redox potential under the extreme flooded conditions goes up to the minus 300 mV due to the production of the___________Hydrogen sulphide
Under the flooded conditions, the micronutrient that protects system from going into the extreme negative state is the_____________Iron
Mechanism by which the nutrients are converted into the cellular components is known as______________Metabolism
Water erosion is known as………………Splash erosion
Maximum loss of the nutrients occurs in the…………..Sheet erosion
………… is the most serious form of the erosionGully erosion
If the vertical slope increases by the eight times, the K.E of run-off water will increase by the…………………..Eight times
Addition of the silica……………………..Makes the soil loose
Crop residues can absorb the water…………. times more than the weightNone of the options is correct
The Waterlogging results in……………..Disappearance of oxygen
Oxygen deficient soil layer in characterized by the…………….. colourDark grey
Presence of the easily decomposable organic matter is an indication of the…………………….Soil reduction
If the Alkali soil gets waterlogged, its PH………………….Falls
In the waterlogged soil, the uptake of the Zn is lowered due to the……………….Its antagonistic interaction with p
………………….are not liming the materialsSulphur
If the quick results are required, is considered the best liming material …………………………….Slaked lime
Due to the more ABA, stomata……………..Are closed
………………. is an organic nitrogen sourceProline
Under the favourable soil moisture conditions, genotypes with the ………………….transpiration efficiency produceLow

…………………….helps in the root proliferation.
P
Antitranspirants is the…………………Reflect light and decrease canopy temperature
Soils having the kaolinite clay show the…………. PH than having the montmorillonite.Higher
In acidic the soils, manganese can occur the………………..Both in divalent or in soluble form
Deficiency of the…………….. is considered the real cause for the poor plant growth in the acidic soils.P
In strongly acidic soil, the dominant form of the microorganisms is the……………………Fungi
Rice is the grouped as…………………… responsive crop towards the limingLow
Under the normal conditions soils affect the yield through……………… primary factors.Three
………………..is mutually beneficial relationship between the plant roots and the bacteria.Symbiosis
Assuming that all nitrogen applied as the fertilizer is used by the soybeans, then what is the source of the most of remaining nitrogen needed by the plants growing in this field________________?The nitrogen released during the decomposition of dead organic matter.
Nitrogenase is destroyed by the___________________Oxygen
Nodulated legumes fixing the nitrogen, but then exposed to the mineral nitrogen from the soil & the fertilizer N will______________Reduce their biological nitrogen fixation activity in the proportion to the ability of the mineral N to meet the plants N requirements
The first detectable step in the interaction of the legumes and the soil rhizobium bacteria leading to the formation of the nodules on plant roots is_____________________Legume roots secrete flavoniods that, when detected by rhizobia, cause activation of rhizobia Nod genes
The primary function of the hemoglobin in the nodule cells containing the biological nitrogen fixing bacteroids______________To trap oxygen in the cell cytoplasm in order to protect the nitrogenase enzyme in the bacteroid from toxic amounts of oxygen.
A reasonable amount of the nitrogen fixation (kilogram ha-1 & lbs acre-1) annually for a highly active the legume system is the________________300
Root hairs originate the from the root_________________Epidermis.
The process of the de-nitrification is the________________Conversion of nitrates to nitrogen gas
Which of following does not lead to increase the fixed nitrogen________________?Biomass burning
Which of following gases is the least important in the problem of the global warming____________________?Hydrogen sulfide
Which is not the way in which Nitrogen is lost from ecosystem_______________?Weathering of parent material
Primary Producers are called………………………Autotrophs
Which of following is not the process of the internally cycled nitrogen________________________?Nitrogen demobilization
Nitrogenous compound more readily taken up by the microbes is the_____________________NH4
The conversion from the ammonium to the nitrate is termed as___________________Nitrification
Which of following forms of the N cannot be directly used by the plants___________________?N2
What is inhibitor on the nitrogenase___________________?Available O2
The key enzyme in the process of the BNF________________________Nitrogenase
……………are the special soil bacteria those responsible for the BNF with legumes.Rhizobia
In rhizobia legume symbiosis, rhizobia provide the plant with the­­­­­­­­­­­­­­­­_________________Fixed Nitrogen
…………strains of the rhizobia should be selected for the inoculantsSuperior
Most important factor affecting the amount of the BNF is_______________Number of rhizobia in the soil
Amount of the nitrogen left in soil by legumes for the subsequent crops depends on____________________Legume species
Entry of rhizobia to the root occurs by the formation of the____________________Infection thread
The shape and location of the Nodules are mostly determined by the_________________Host legume
BNF requires the biological energy from the__________________Host plant
Legume rhizobia symbiosis require the about kilograms of carbohydrates /kg of the N fixed________________10
Exchange of the plant sugars for the NH3 takes place in the______________Nodules
Young nodules that are effective are often  the…………………….. in colourPink to red
………………..form of the bacteria is known as bacteriodNon motile
If the inoculant is not stored properly, the number of the rhizobia in the inoculant will_________________________Decline
Liquid & solid substance containing the living rhizobia is known as______________Inoculant
Rhizobia are the soil bacteria that can infect the………………………..of legumes for N fixation.Root
Rhizobia require the temperature for the growth in the range of the……………………….25-30c
……………………..is the most serious threat to the good quality inoculants.Heating
…………………..is the poorest method of the seed inoculation.Lime pelleting can be the beneficial when the soils are highly………………………..Acidic
Rhizobia in the coated seeds die rapidly when legume seeds are planted in the………………………Hot and dry soil
Grains of the legumes are rich in the……………………….Proteins
The nitrogen fixation ability of the nodule is referred to the ………………………………….Effectiveness
The quality of the various inoculants can be tested by the………………………..Grow out tests
Urea Fertilizer contains the……………………..percent nitrogen.46
Chlorophyll occurs in the………………… of the plantChloroplast
cell………………….increases the amount of the inoculant that willSticker
…………………..are the major nitrogen fixing crops.Legumes
…………………….. is the ultimate source of the water.Rainfall
Turgor is the important because it gives the………………………… to the cellShape
The upper limit of the available water is the……………………Field Capacity
The ability of the water to enter into the different reactions is known as …………………………Water activity
Developmental plasticity is the mechanism of the………………………Drought escape
If the stomata are closed the water use efficiency…………………….Increases
The energy available in the system to perform the work is the………………………..Free energy
In the mature cells most of the water is present in the……………………..Vacuole
The water potential of the pure free water is the…………………Maximum
The energy developed in the solution due to the presence of the solutes is…………………………….Osmotic potential
________________is the permanent climatic feature of the region.Aridity
In Pakistan, more than the……………….million hectares area is subjected to the drought5
The opening and the closing of the stomata is known as ………………Stomatal regulation
Hydrophytes have the ………………..root hair.No
100 Agronomy One Liner Questions

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