MCQs Soil Science-49

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

2. 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.

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

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

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

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

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

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

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

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