36 FERTILISERS AS AN AID TO 



a complete fertiliser, supplying about 16 Ibs. 

 nitrogen, 70 Ibs. soluble phosphate, 



Domwwtra- an( * 2 5 ^ S * P otasn P er acre > nas 

 Uon8i proved invariably most profitable, 



as witness these average figures for 

 the manured plots over those with no manure. 



Gain in Saleable Grain, 8$ bushels per acre. 

 Straw 9 cwts. 



which gives a clear profit of i. 6s. 6d. per 

 More than acre P er vear > after paying for the 

 too percent, manure. 



dear profit The West of Scotland Agricultural 

 on outlay. College have conducted similar ex- 

 periments on light loam, and record an 



Increase in Grain of nj bushels per acre. 

 ,, Straw of 12 cwts. ,, 



showing a clear profit of i. 8s. 8d. per acre, 

 after paying for the fertiliser. 



Further confirmation is afforded by the 

 manurial trials conducted at the 

 Harper-Adams College Farm during 

 the three years 1909 to 1911, where a complete 

 manure supplying no Ibs. soluble phosphate, 

 16 Ibs. nitrogen and 10 Ibs. potash on light 

 loam, gave the following very profitable re- 

 turns : 



Increase in Grain of 1 1 bushels per acre. 

 ,, Straw of 7$ cwt. ,, 



According to Mr. A. D. Hall, the question of 

 potash for barley of high quality is 

 High erade doubtfuL j n his book "Fertilisers 

 and Manures" he says : " While 

 potash manures have been found to 

 stiffen the straw and increase the size of the 



