292 The Wohum Field Experiments, 1914. 



produce was carted home, but not stacked, and the corn was 

 threshed out on September 8. 



The results are given in Table II., page 289. 



The crop was an improvement on that of 1913. This was 

 due, no doubt, in measure, to care having been taken to clean 

 the land well. So high a yield has not been obtained on these 

 plots since 1907, when the unmanured crop was 19 bushels 

 per acre. 



Of the two unmanured plots No. 1 is to be taken for 

 preference, the unmanured yield, plot 7, having been con- 

 siderably damaged by washing by rain, and the tilth on it in 

 consequence not having been so good. The unmanured yield 

 (plot 1) was 17'8 bushels per acre. 



Mineral manures alone (plot 4) gave an increase to 19*7 

 bushels. 



Sulphate of ammonia used by itself or with minerals, but 

 without lime, gave no crop in any case. Where 1 ton of lime 

 altogether (plot 2aa) had been used in four different appli- 

 cations of 5 cwt. each in addition to sulphate of ammonia, 

 only 6*9 bushels were obtained, this amount of lime clearly 

 not having been sufficient. 



The repetition of 2 tons per acre of lime in 1905, 2 tons per 

 acre having been previously given in 1897, produced 10*1 

 bushels only, but similar repetition in 1912 gave respectively 

 21-4 bushels (plot 2bj, 24-3 bushels (plot 5b), and 20-3 bushels 

 (plot 8aa). 



The use of 1 ton of lime only with sulphate of ammonia and 

 minerals (plot 5aa) gave 15*5 bushels. The omission, for a 

 single year, of sulphate of ammonia (plots 8aa and 8bb compared) 

 only lowered the produce by 1 bushel, the corresponding 

 omission of nitrate of soda giving (plots 9a and 9b compared) a 

 diminution of 5*6 bushels, the produce being even less than 

 with the minerals alone (plot 4). 



Nitrate of soda, used by itself, gave only 12'2 to 15*5 

 bushels, the heavier dressing not producing an increased crop. 



The addition of minerals to nitrate of soda gave (plot 6) 18 

 bushels, while the double dressing of nitrate of soda with 

 minerals (plot 9a) produced 19*5 bushels. 



The comparison of plots 10a and 11a would seem to show 

 that phosphates were more required than potash, while, as 

 between rape dust and farmyard manure (plots 10b and lib), 

 the advantage was decidedly with farmyard maiaure, this plot 

 giving 24-6 bushels, which was the highest produce of any of 

 the series. 



As regards the quality of the corn, the chief features were 

 that all the samples were sound and sweet, having been 

 harvested well. None of them were, however, quite up to 



