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MCQs

Total Questions : 199 | Page 20 of 20 pages
Question 191. The most abundant metal in the earth’s crust and toxic to plants in low concentration is____________________?
  1.    Mo
  2.    Al
  3.    Fe
  4.    All the above
 Discuss Question
Answer: Option B. -> Al
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 192. In flood rice, snail feed on bacteria called__________________?
  1.    Helix
  2.    Limnea
  3.    Azolla
  4.    None of the above
 Discuss Question
Answer: Option C. -> Azolla
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 193. Which bacteria convert nitrite to nitrate___________________?
  1.    Frankia
  2.    Nitrobacter
  3.    Pseudomonas
  4.    None of the above
 Discuss Question
Answer: Option B. -> Nitrobacter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 194. Point of zero change means____________________?
  1.    All the covalent bonds
  2.    Zero charge at surface
  3.    All are ionic bond
  4.    None of the above
 Discuss Question
Answer: Option B. -> Zero charge at surface
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 195. Examples of macrobiota are______________________?
  1.    Enchytrids
  2.    Fungus
  3.    Bacteria
  4.    Plants
 Discuss Question
Answer: Option A. -> Enchytrids
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 196. Part of soil which is in contact with root surface is called___________________?
  1.    Rhizoshpere
  2.    Lithoshpere
  3.    Atmoshpere
  4.    None of the above
 Discuss Question
Answer: Option A. -> Rhizoshpere
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 197. Which mulch reduce soil temperature?
  1.    Polythene
  2.    White polythene
  3.    Black polythene
  4.    Both B&C
 Discuss Question
Answer: Option A. -> Polythene
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 198. Humic acid is soluble in____________________?
  1.    Acid
  2.    Alkali
  3.    Both a & b
  4.    None of the above
 Discuss Question
Answer: Option B. -> Alkali
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 199. The tree sends down roots from its branches to the soil is know as:_______?
  1.    Oak
  2.    Pine
  3.    Banyan
  4.    Palm
 Discuss Question
Answer: Option C. -> Banyan
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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