PROFITABLE FARMING. 47 



Tons. Cwt*. Qrs. 



Farm-yard manure alone, average about 



15 tons, per acre, gave 24 12 I per acre 



Farm -yard manure, as above, with a 

 complete manure supplying 20 Ibs. 

 nitrogen, 200 Ibs. soluble phos- 

 phate, and 60 Ibs. potash per acre, 

 and 2\ cwts. salt, with I cwt. nitrate 

 soda as top dressing at singling ... 32 14 I ,, 



Gain over Farm -yard manure 



alone 8 20 



Increased Profit per acre after paying 



for Fertilisers i 13 10 



The roots were valued at local market 

 prices. 



A special series of experiments was conducted, 

 comparing superphosphate, basic slag, steamed 

 bone meal, &c., so as to ascertain the best 

 source of phosphates for this crop. In the Col- 

 lege Report for 1905-6 it is stated as the result 

 that " superphosphate and steamed bone meal 

 are to be recommended. Steamed bone meal 

 gave a considerable profit, and one only as. id. 

 per acre less than superphosphate. Basic slag 

 gave a loss/ 1 



Similar records from Devonshire, where the 

 County Board of Education carried 

 out extensive trials during the three 

 years 1904-6, at various farm centres, 

 the most profitable combinations 

 of fertilisers, in addition to farm-yard manure, 

 resulted thus : 



