LIMITS OF ENDURANCE OF DIFFERENT FARM CROPS. 391 



The pots were sown on December 3rd, 1902, with 13 

 grains of barley in each pot, the surface being covered as 

 in the other experiments with a mulch of shredded coco- 

 nut fibre and the soil kept moist during the experiment. 



The following notes were made on December 13th with 

 regard to the growth of the plants : — 



In No. 84 the seeds had germinated well, but the growth 

 had already been affected. 



In Nos. 85 and 86, the plants had germinated weakly and 

 the growth was very poor. In the remaining pots 

 the seed had not germinated at all. 



From these experiments it would appear that the limits 

 both to growth and germination had been struck, the growth 

 being affected by *10 per cent. NaOl and the germination 

 at about '25 per cent. 



Further pots were sown on July 30th, 1903, with the 

 following quantities of salt : — 



No. 92, '05 per cent. 

 „ 93, '07 

 „ 94, -10 

 „ 95, '15 



These were examined August 21st, 1903, when the follow- 

 ing notes were made : — 



No. 92, germination unaffected and growth unaffected. 

 No. 93, germination unaffected, growth very slightly 



affected. 

 No. 94, the germination had been slightly affected and the 



growth retarded. 

 No. 95, germination was weak and the growth was poor. 



Examination of the pots a month later, September 29th, 

 1903, showed that in Pot No. 92, the growth was quite un- 

 affected and the plants were growing vigorously. 



