29 



Table XXII. — Relative ask composition, a/ s/ceet cassava from the different plots. 

 LEAVES. 



Relative composition of ash (percent- 

 ages in plants from Plat 1=100). 



The amount of total ash in the loaves, stalks, and roots increased 

 in all the lime plats by percentages varying between 2 and 14 per cent 

 The amount of lime in the dry substance of the plant increased with 

 the amount of lime in the soil in contradistinction to bush beans. 

 Magnesia increased \vith the lime, although in smaller proportion. 

 Phosphoric acid and potash remained practically constant in tliu 

 plants from all the plats, but in the stalivs from Plats II and IV thero 

 was an appreciable increase in the phosphoric acid. In the case of 

 the leaves there seemed to be a tendency for the iron content to 

 diminish mth the increase of carbonate of lime in the soil, but in tlie 

 stalks and roots the iron content, though a little irregular, tended to 

 be constant. For the plant as a whole, the iron content was little 

 affected by the different soils, except for a small depression in tlie 

 plants from Plat IV. The nitrogen content of the leaves was con- 

 stant for aU four plats. The nitrogen contents of the stalks and 

 roots from Plat II were the same as the check, while there was a 

 depression in tlie nitrogen contents of the stalks and roots from 

 Plats III and IV. 



UPL.VND RICE. 



Of the seven crops of rice grown, six were grown for periods ranging 

 from 84 to 129 days and one for only 25 days. The crop grown for 



