MCQs Soil Science-4

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

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

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

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

5. ____________ is the main function of seeds

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

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

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

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

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

11. The soil area around the root zone is______________

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

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

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

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

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

17. ___________ , not available to plants

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

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

20. _______ is the role of root hairs in plants