in] SLOW ACTING MANURES 25 



and Fig. 8) and with hay (p. 52) : it is also demonstrated in the 

 Irish experiments with potatoes: 



Yield of potatoes, 

 Manures applied 5 years, 1908-12 



tons cwts 

 15 tons farmyard manure, 4 cwts superphosphate, 1 cwt 



muriate of potash + 1 cwt sulphate of ammonia 11 2 



15 tons farmyard manure, 4 cwts superphosphate, 1 cwt 



muriate of potash + 2 cwts sulphate of ammonia ... 11 6 



15 tons farmyard manure, 4 cwts superphosphate, 1 cwt 



muriate of potash + 3 cwts sulphate of ammonia ... 11 11 



In peace times the extra yields are often not worth having, 

 being produced at too great a cost, but in these days of high prices 

 the extra yield may prove more profitable, and in any case it 

 ought to be obtained if possible. 



Muriate of ammonia is just as good as sulphate of ammonia. 



Nitrolim. In general properties this is much like sulphate of 

 ammonia, and has given very useful results. It has recently 

 been made in granulated form, which is easier to handle than the 

 older samples. 



Slower acting nitrogenous manures. Shoddy. This waste 

 product from the Yorkshire cloth mills has considerable fertilising 

 value, and can be used without hesitation wherever it can be 

 got cheaply. The best way of determining its value per ton is 

 to get an analysis (nitrogen only) through the County Authority, 

 and then to multiply each percentage of nitrogen by 6s. ; the 

 result gives a reasonable price at the Yorkshire mill. Thus, if 

 the sample contained 7-5 per cent, of nitrogen a reasonable price 

 would be 7-5 x 6s. = 46s. per ton, and it might be worth while 

 to pay more. Carriage, of course, is extra. 



Shoddy can be used on any crop, and gives a good return at 

 once; thus, at Rothamsted the following results were obtained 

 by the use of 10 cwts per acre: 



