43 



this difference materially Jiffects our conclusions. Each plot when 

 between two nothings is c(Miiparcd with the average of the two. In 

 other cases it is compared with the nearest nothing. No use is made 

 of plot 6 in these comparisons. 



This experiment was under our immediate observation throughout 

 the season, and from a very early period it became evident that potash 

 was proving much more beneficial than either phosphoric acid or 

 nitrogen.. No difference in relative standing of plots could be detected 

 with advance in si'asou. The plots which were ahead at the time of 

 the first measurement ended ahead. 



RESULTS OF MEASUREMENTS. 



Of 

 Plot. 



FERTILIZER USED. 



Nitrate of Soda, 



Dissolved Bone-black, 



Nothing, 



Muriate of Potash, 



Lime, 



Nothing, 



Barn-yard Manure 



Nitrate and Hoiie-black . ...... 



Nothing , 



Nitrate and Potash, 



Bone-black and Potash, 



Nothing, 



Plaster, 



Nitrate, Bone-black and Potash 



Average of Measurements. 



June 26. 



12.6 



13.4 

 12.0 

 15.6 

 12.8 

 11.8 

 21.4 

 15.8 

 15.6 

 20.0 

 21.8 

 14.4 

 17.6 

 24.2 



July 5. 

 25.4 



25.0 

 21.0 

 27.8 

 22.8 

 23.4 

 35.8 

 28.8 

 28.2 

 33.8 

 34.0 

 24.2 

 25.4 

 37.4 



July 15. 



38.1 

 39.5 

 35.5 

 44.6 

 34.4 

 35.8 

 50.0 

 37.2 

 39.0 

 48.6 

 51.1 

 34.2 

 36 

 54.2 



July 25. 



58.3 



52.2 

 48.2 

 55.5 

 44.6 

 50.7 

 69.4 

 57.5 

 55.4 

 69.4 

 71.2 

 68.7 

 50.5 

 72.6 



These figures are the averages of a very large number of actual 

 determinations of the height of individual plants. They are chiefly 

 interesting in that they make it evident that any slight advantage 

 which the nitrate of soda gave was well sustained throughout the 

 season. I judge that we should have obtained no better results had 

 this fertilizer been applied in fractional dressings. This point will 

 be tested hereafter. 



ANALYSIS OF MANURE USED. 



