Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?

Related Mcqs:

1. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?

   A. Nitrogenous fertiliser
   B. Potassic fertiliser
   C. Phosphatic fertiliser
   D. None of these

2. -10-5 fertilisers mean that they contain______________?

   A. 5, 10, 5% respectively of N2, P2O5 and K2O
   B. Only 5 to 10% active fertiliser constituents

   C. 5 to 10% filler & carrier of soil conditioners
   D. None of these

3. Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?

   A. Nutrient supply
   B. Texture
   C. Water holding capacity
   D. All A., B. and C.

4. Which of the following is not a measure component necessarily to be present in fertilisers ?

   A. Nitrogen
   B. Potassium
   C. Phosphorous
   D. Sulphur

5. Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?

   A. Steam reforming of naphtha and cracking of natural gas
   B. Electrolysis of water
   C. Cryogenic separation of hydrogen from coke oven gas
   D. All A., B. and C.

6. Commercial fertilisers are available mostly in the form of__________________?

   A. Powder
   B. Granules
   C. Lumps
   D. Flakes

7. Potassic fertilisers do not promote the development of ______________________?

   A. Stems & leaves during early stage of plant growth
   B. Starches of potatoes & grains
   C. Sugar of fruits & vegetables
   D. Fibrous materials of plants

8. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ?

   A. Calcium nitrate
   B. Calcium ammonium nitrate (CAN)
   C. Urea
   D. Ammonium sulphate

9. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?

   A. Nitrogenous fertilisers
   B. Phosphatic fertilisers
   C. Potassic fertiliser
   D. None of these

10. Which of the following fertilisers contains the least percentage of nitrogen ?

    A. Liquid ammonia
    B. Urea
    C. Ammonium phosphate
    D. Ammonium sulphate