556 Report of Experiments with different Manures 



Plot 7. 550 lbs. nitrate of soda* (equal in nitrogen to the ammo- 



niacal salts of plot 4). 

 Plot 8. Mixed mineral manure, composed of — 



200 lbs. bone ash ) , , ^ ,,. 



150 lbs. sulphuric acid (sp. gr. I'T I superphosphate of lime. 



300 lbs. sulphate of potash. f 



200 sulphate of soda.f 



100 lbs, sulphate of magnesia, f 



Plot 9. " Mixed mineral manure," as plot 8, and 2000 lbs. sawdust. 



Plot 10. " Mixed mineral manure," as plot 8, and 200 lbs. each 

 sulphate and muriate ammonia. 



Plot 11. " Mixed mineral manure," as plot 8, 200 lbs. each sul- 

 phate and muriate ammonia, and 2000 lbs. sawdust. 



Plot 12. " Mixed mineral manure," as plot 8, 200 lbs. each sul- 

 phate and muriate ammonia, and 2000 lbs. cut wheat- 

 straw. 



Plot 13. " Mixed mineral manure," as plot 8, and 400 lbs. each 

 sulphate and muriate ammonia. 



Plot 14. " Mixed mineral manure," as plot 8, and 275 lbs. nitrate 

 of soda.* 



Plot 15. "Mixed mineral manure," as plot 8, and 550 lbs. nitrate 

 of soda* (equal In nitrogen to the ammoniacal salts of 

 plots 4, 10, &c.). 



Plot 16. 14 tons farm-yard dung. 



Plot 17. 14 tons farm-yard dung, and 100 lbs. each sulphate and 

 muriate ammonia. 



It would have been desirable to have had some plots with the 

 superphosphate of lime, and the mixed alkali-salts, used sepa- 

 rately ; but it was considered, that to Increase the number of the 

 experiments, would be to extend the series beyond convenient 

 practicable limits. 



The artificial manures were, for the purpose of equal distribu- 

 tion, mixed with ashes prepared by burning soil with a portion 

 of weeds and turf. They were sown broadcast. The date of 

 sowing was, in 1856, the middle of February ; In 1857, the 24th 

 February; and In 1858, the 31st of March ; excepting that the 

 nitrate of soda (used in 1858 only) was not applied until the 8th 

 of April. The farm-yard manure and the sawdust, excepting" 

 in the first season, were put on in the previous November or 

 December. 



The first crop only, in each year, was mown ; and the produce 



* The experiments with nitrate of soda did not commence until the third season, 

 1858. 



t The sulphates of potash and soda used, are the rough commercial articles j 

 the sulphate of magnesia, Epsom salts. 



