PLATE 6 

 A.— Effect of carbonate of lime in depressing the availability of iron (experi- 

 ment vii): 



i Calcareous soil in bucket, silica sand plus iron in sieve. 



2 Calcareous soil in bucket, silica sand plus carbonate of lime and iron in sieve. 

 B — Effect of various substances on growth of rice in calcareous soil (experi- 

 ment VIII). 



i. Noncalcareous soil. 



2. Calcareous soil . 



3. Calcareous soil with molasses added. 



4. Calcareous soil with "ferric molasses" added. 



5. Calcareous soil with molasses and ferrous sulphate added. 



6. Calcareous soil with ferrous sulphate added. 



