1. Exanthema is due to deficiency of

2. Presence of phosphorus

3. Which one of the following organism help in absorption of phosphorus from soil by plants

4. The requirement of micro nutrient are always low if the concentration increases it leads to

5. NPK denotes

6. Oxygen scavangers present in root nodules of legumes is

7. The enzyme involved in biological nitrogen fixation are

8. In cabbages, ‘Whiptail’ is a characteristic deficiency disease. It is caused by the deficiency of

9. Insectivorous plants grow where

10. Phosphorous is a constituent of

• A. Cell membrane
• B. Nucleic acids
• C. cellwall
• D. chlorophyll
  

11. Minerals present in the soil are absorbed by

12. Toxicity of which element leads to the appearance of brown spots on leaves

13. Phytotron is meant for

14. Analysis of xylem sap shows

15. Which of the following is not a macronutrient

16. The nitrogen exists as two nitrogen atoms joined by

17. Biological nitrogen fixation was discovered by

18. Which one of the following is not a micronutrient?

19. Conversion of ammonia into nitrates through Nitrosomonas is called

20. Which element is required for opening and closing of stomata?