MCQs Soil Science-49

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

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

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

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

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

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

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

8. 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.

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

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