lO 



Journal of Agricultural Research 



Vol. V, No. 



described. To this sand salts were added in solution with the quantity 

 of water necessary to bring the sand to the desired moisture content. 

 Twenty-five kernels of Turkey Red wheat were planted in each pan, 

 which was then covered with window glass to retain the moisture. Any 

 loss in moisture was made up from time to time. The percentage of 

 germination at the end of three weeks is given in Table VII. 



Table VII. — Percentage of germination at the end of three weeks of the seeds of Turkey 

 Red wheat in sand with different quantities of moisture and alkali salts. Salts added 

 in solution 



Salt and concentration (p. p. m. 

 dry soil). 



Sodium chlorid: 



None 



800 



1,800 



2,400 



2,900 



3.600 



4,000 



4.500 



S.700 



6,000 



Sodium carbonate: 



None 



1,200 



1,600 



2,000 



2,700 



3.300 



4,000 



4.700 



Sodium sulphate: 



None 



2,000 



4,000 



6,000 



8,000 



Percentage of water in sand. 



10,000. 

 12,000. 

 14,000. 

 16,000. 

 18,000. 



Magnesium sulphate: 

 None. 



12,000. 

 14,000. 

 16,000. 

 18,000. 



20,000. 

 22,000. 

 24,000. 

 26,000. 

 28,000. 



28 



84 



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