MCQs Soil Science-49

1. _______ are characterized by low rainfall; generally, total rainfall is less than the natural evapotranspiration rate

2. Homogeneous nucleation of ice occurs at approximately _______°C

3. Gypsum, used as a soil amendment, has ________ hardness on the Mohs’ scale

4. ________ is the basic unit of soil classification, consisting of soils with similar profile characteristics

5. __________ is soil or sediment most commonly deposited by flowing water, such as rivers, and is often found in river valleys and floodplains

6. A soil is considered ____________ if it has an electrical conductivity (EC) < 4 dS m-1 and a sodium adsorption ratio (SAR) > 13 (mmol L-1)1/2.

7. A crop grown on residual moisture after the harvest of rice crop is called_______

8. The _______________________ of soil is used for estimating the mass of a volume of soil too large to weigh

9. Which of the following is NOT a standard method for eradicating waterlogging in agricultural fields?

10. When irrigation water with high concentrations of carbonates and bicarbonates interacts with soluble calcium, it can lead to the formation of __________