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

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

Which one of the following elements is least likely to be found in commercial fertilisers?

A

Nitrogen

B

Phosphorous

C

Potassium

D

Silicon

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

A

Nitrogen

B

Potassium

C

Phosphorous

D

Sulphur

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

A

Nitrogeneous fertiliser

B

Potassic fertiliser

C

Phosphatic fertiliser

D

None of these

Which of the following fertilisers is used as a cattle feed?

A

Urea

B

Calcium ammonium nitrate

C

Superphosphate

D

Ammonium sulphate

Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?

A

Ammonium sulphate

B

Ammonium nitrate

C

Ammonium phosphate

D

None of these

Commercial fertilisers are available mostly in the form of

A

Powder

B

Grannules

C

Lumps

D

Flakes

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 of the above

Commercial production of hydrogen for the manufacture of nitrogeneous 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 of the above

The three elements most needed in common fertilisers are :

A

Sulphur, Phosphorous and Sodium

B

Nitrogen, Potassium and Phosphorous

C

Phosphorous, Sodium and Nitrogen

D

Calcium, Phosphorous and Potassium

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

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