4. Soil Science

Question 1

Law of minimum was proposed by

Answer 1

J. V. Liebig, 1840

Question 2

Diameter of clay particles

Answer 2

Less than 0.002mm

Question 3

Particle density of most of the soil

Answer 3

2.65 g/cc

Question 4

Bulk density of general soil

Answer 4

1.33 g/cc

Question 5

Total pore space highest in

Answer 5

Clay soil

Question 6

Black cotton soils are found in

Answer 6

Maharashtra, MP

Question 7

Which Pulse crop does not fix nitrogen from the atmosphere

Answer 7

Rajma

Question 8

First Manufactured fertiliser in India is

Answer 8

SSP

Question 9

ICAR classifies soil in

Answer 9

8 Groups

Question 10

Apical bud dominance is caused by which hormone

Answer 10

Auxin

Question 11

The crops which absorb nitrogen in ammonical form directly are

Answer 11

Paddy And potato

Question 12

Pascal Is the S I unit of

Answer 12

Pressure

Question 13

Formula of baking sofa is

Answer 13

NaHCO3

Question 14

Formula of castic soda is

Answer 14

NaOH

Question 15

Organic matter content in Indian soil is generally

Answer 15

Less than 0.5%

Question 16

Red soils are found in

Answer 16

Tamil Nadu

Question 17

Which soils are best suited for agriculture

Answer 17

Red soil

Question 18

Process of mixing of soils

Answer 18

Pedoturbation

Question 19

What percent of organic matter is present in organic soil

Answer 19

More than 20%

Question 20

One an of surface soil over 1ha land weight is

Answer 20

150 tonnes

Question 21

Major source of nitrogen absorption by plants in which form

Answer 21

Nitrate ( NO3) form

Question 22

Smallest volume of soil is called

Answer 22

Pedon