Engineering :: Fertilizer Technology

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Nitrogenous fertilizer is required

A.	during early stages of plant growth to promote development of stems and leaves	B.	to accelerate seeding or fruit formation in later stages of growth
C.	for the development of the starches of potatoes and grains	D.	for the development of the sugar of fruits and vegetables and the fibrous material of plants

Phosphatic fertilizer is required

A.	during early stages of plant growth to promote development of stems and leaves	B.	to stimulate early growth and accelerate seeding or fruit formation in later stages of growth
C.	for the development of the starches of potatoes and grains	D.	for the development of the sugar of fruits and vegetables and the fibrous material of plants

Potassic fertilizer is required

A.	for the development of the starches of potatoes and grains	B.	for the development of the sugar of fruits and vegetables
C.	for the development of the fibrous material of plants	D.	all of these answers

Excessive application of synthetic fertilizers often causes shrivelling of the roots and wilting of the plant. This is because

A.	the soil becomes too acidic	B.	the soil becomes too alkaline
C.	the osmotic pressure of the soil water becomes higher than that of the plant sap	D.	the osmotic pressure of the soil water becomes less than that of the plant sap

Fertilizer value of a nitrogenous fertilizer is expressed in terms of its

A.	N content	B.	NH3 content
C.	HNO3 content	D.	NO content

Phosphatic fertilizer is graded based on its

A.	P2O5 content	B.	P content
C.	PCI3 content	D.	H3PO4 content

Potassic fertilizer is graded based on its

A.	K2O content	B.	KOH content
C.	KNO3 content	D.	K content

Mixed fertilizers contain three principal elements (nitrogen phosphorus and potassium). 5-10-5 mixed fertilizer contains

A.	5 wt. % P2O5 10%N 5% K2O	B.	5 wt. % N 10% P2O5 5% K2O
C.	5 wt. % N 10% P2O5 85% K2O	D.	10 wt. % N 10% P2O5 5% K2O

NPK fertilizer is a

A.	nitrogenous fertilizer	B.	phosphatic fertilizer
C.	potassic fertilizer	D.	mixed fertilizer

10.

The nitrogenous fertilizer with highest percentage of nitrogen is

A.	urea	B.	ammonium sulphate
C.	ammonium nitrate	D.	calcium nitrate