Which of the following statements regarding soil is/ are correct?
1. Alluvial soils are rich in nitrogen content.
2. Black soils are rich in iron and lime but deficient in nitrogen.
3. Laterite soils are rich in iron and aluminium but deficient in nitrogen and potassium.
Select the correct answer using the code given below.

Which one of the following with regard to Aridisol, one of the soil orders, is not correct?
 

Match List I with List II and select the correct answer using the code given below the lists:

List I

List II

(Institute)

(Location)

A. National Institute of Ayurveda 1. Chennai

B. National Institute 2. Bengaluru of Homoeopathy

C. National Institute 3. Kolkata

of Unani Medicine

D. National Institute of Siddha 4. Jaipur
 

The term soil impoverishment relates to which one of the following?