[VSQ]SOIL SCIENCE, SET 14

SOIL SCIENCE

Q.1

N% in Thio urea.

Ans. 

36.8%.

Q.2

AM & N serve are.

Ans. 

Nitrification inhibitors.

Q.3

Rhizobium melilots is used for the crops.

Ans. 

Medicago (Alfalfa), Trigonella (Fenugreek).

Q.4

R. trifoli is used for.

Ans. 

Trifoliem (Clover).

Q.5

R. leguminosarum is used for.

Ans. 

Pisum (Pea), Lens (Lentil).

Q.6

Azospirillum is used for.

Ans. 

Sorghum.

Q.7

Low status of N in soil when it is less than.

Ans. 

250 kg/ha.

Q.8

Analyzing process for determination of available N.

Ans. 

Alkaline permanganate method.

Q.9

Phosphorus is extracted by. 

Ans. 

Olsen's method & Bray No. 1 method.

Q.10

K± & Na± is determined by.

Ans. 

Flame photometer.

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