PLATE s 



A. — Rice grown in calcareous and noncalcareous soils and sprayed with ferrous 

 sulphate solution (experiment I). 



1-4. Noncalcareous soil; plants in 1 and 3 unsprayed, those in 2 and 4 sprayed. 

 5-8. Soil containing 30 per cent carbonate of lime; plants in 5 and 7 unsprayed, 

 those in 6 and 8 sprayed. 

 B. — Apparatus used in growing plants in experiment VII. 



(62) 



