[VSQ]SOIL SCIENCE, SET 1

SOIL SCIENCE

Q.1

Granite & Basalt are type of rocks.

Ans. 

Igneous rocks.

Q.2

Major source of Mg.

Ans. 

Dolomite.

Q.3

Most resistant to weathering.

Ans. 

Quartz.

Q.4

Least resistant to weathering.

Ans. 

Calcite.

Q.5

Kankar nodules are found mostly in.

Ans. 

Red soils.

Q.6

C:N ratio of micro organism.

Ans. 

4:1 to 9:1.

Q.7

Wood is mainly decomposed by.

Ans. 

Actinomycetes.

Q.8

Organic matter content in Indian soils is generally.

Ans. 

<0.5%.

Q.9

Optimum temperature & pH for Nitrifying bacteria is.

Ans. 

Temp. 30-35°C, pH 6.5-7.5

Q.10

Loss of N2 in the form of NH3 in alkaline medium known as.

Ans. 

Volatilization.

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