Agriculture MCQs

Page No. 29

The net reaction of photosynthesis is_____________________?


aCO2 + H2O light O2 + (CH3O)


bCaCO3 + 2HCl CaCl2 H2O+CO3


c((CH2O) + O2 CO2 + H2O)


dNone of the above



The little clay mineral is_____________________?


aExpending


bNone expending


cNone or little expending


dNone of the above



The chemical formula of Hematite is_____________________?


aAL (OH)2


bFe2O3


cFe OOH


dNone of the above


View Answer Fe2O3

The deficient level of N (%) in plants suggested by various workers is____________________?


a0%


b3%


c5%


d10%


View Answer 3%

Most of the productive soils in Pakistan have pH______________________?


aBetween 7.5 to 8.5


b8.5


cBoth A and B


dNone of the above


View Answer Between 7.5 to 8.5

The reaction of Na2 CO3 salt is____________________?


aAlkaline


bNeutral


cAcidic


dNone of the above


View Answer Alkaline

The unit of electrical conductivity is____________________?


adsm-1


bmmhos/m


cms/cm


dAll of the above


View Answer dsm-1

A compound toxic to crop formed by the thermal decomposition of urea is_________________?


aUric acid


bBiuret (NH2CONH CONH2 H2O)


cDiuret


dboth B & C



The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?


a3-15 meq/100g CEC


b40 meq/100g CEC


c50 meq/100g CEC


dNone of the above


View Answer -15 meq/100g CEC

The term applied to a material which tends to absorb moisture from the atmosphere is called__________________?


aCapillary


bHydroscopic


cAvailable


dGravitational


View Answer Hydroscopic

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