150 THE WHOLE ART OF RUBBER-GROWING 



once the whole of the growing crop. When this is 

 done, the ground is again levelled, and the crop 

 proper at once drilled in at a distance of six inches 

 apart in the rows and four inches between the plants. 

 Under this system the soil is thoroughly and effec- 

 tively inoculated, and the crop, other things being 

 equal, will mature in eight or nine weeks from the 

 time of sowing. 



The average yield from inoculated soil is three- 

 quarters of a ton per acre. In Ceylon, if planted 

 early enough, three crops should be easily raised in 

 the course of a year. 



Many analyses have lately been made of the soya 

 bean, and the percentage of dry weight of oil has 

 been found to vary from 17 to 29 per cent, according 

 to kind grown, the country in which it was raised, 

 and the completeness and method in which the bean 

 was dried. But in a general way the following is 

 a fair average analysis of the bean at present under 

 manipulation in the oil mills at Hull, Antwerp, and 

 elsewhere : 



The residue cake gives as much as 79 per cent, 

 of hypophosphites, and is therefore of very high 

 feeding value. During the past year eminent millers 

 both in England and on the Continent turned their 

 attention to this residue material, and have discovered 



