MCQs Soil Science-4

1. __________ is, a form of carbon, generated catalytically in the gas phase

2. ________ is the study of soil formation, classification, and morphology

3. ________ is the study of the origin, composition, distribution, and structure of rocks

4. The soil area around the root zone is______________

5. With reducing soil pH, availability of __________ increased for plants

6. ___________ , not available to plants

7. ___________ describes the relationship between the amount of water a soil can hold and the tension with which that water is held

8. If a solution has a pH of 5, the hydrogen ion concentration is ________ greater than a solution with a pH of 6.

9. The upper and most weathered part of the soil profile (A-horizons) is called _____

10. The water held between field capacity and permanent wilting point is ___________

11. With reducing soil pH, availability of soil __________ is reduced for plants

12. CO2 concentration in the soil is ________the CO2 in the atmosphere

13. ____________ is the main function of seeds

14. _______ is the role of root hairs in plants

15. Salt affected soils are generally formed in ________________ climate.

16. ________ investigates how soil influences living things, soil flora and fauna

17. If a solution has a pH of 5, the hydrogen ion concentration is ________ greater than a solution with a pH of 6.

18. Indus water treaty, between Pakistan and India, was signed in __________

19. In ______________  nitrogen and hydrogen gases combine under high pressure and temperature with a catalyst

20. ___________ element is the most abundant element in the Earth’s crust