330 EXPEEIMENT STATION RECORD." 



inouia. 4 cwt. siiperphospbate, and 1 cwt. muriate of potash. Tests of sprout- 

 ing potatoes at various points show average gains following sprouting which 

 ranged from 3 cwt. to 3 tons 17 cwt. per acre in 1910. During the period 1903- 

 1910, the average results of 676 tests show an average gain per acre following 

 sprouting amounting to 2 tons 4 cwt. 



In a test of applications of farmyard manure, superphosphate, sulphate of 

 ammonia, kainit, salt, and nitrate of soda in various mixtures to mangels, in- 

 crea.ses in yield were secured ranging from 14 tons after an application of 20 

 tons of farmyard manure to 24 tons 1 cwt. after an application of 20 tons of 

 farmyard manure, 4 cwt. superphosphate, 2 cwt. sulphate of ammonia, and 

 4 cwt. salt. The same relative results are shown by the average yields of the 

 4 years 1906-1909. Applications of 3, 4, and 5 cwt. superphosphate with dung, 

 sulphate of ammonia, and salt gave apparently equal average profits during 

 the years 1908 and 1909. An application of 1 cwt. of sulphate of ammonia per 

 acre supplemented by dung, superi^hosphate, and salt resulted in a slightly 

 smaller total yield of mangels per acre but a somewhat greater average profit 

 during 1908 and 1909. An application of 4 cwt. of salt supplemented by dung 

 superphosphate, and sulphate of ammonia was followed by a higher average 

 yield per acre and a higher average net profit per acre during 1908 and 1909 

 than when 2 cwt. or 6 cwt. were used. The mixture recommended for the 

 mangel crop, therefore, is 4 cwt. superphosphate, 2 cwt. sulphate of ammonia, 

 and 4 cwt. salt per acre. 



In a test of applications of sulphate of ammonia, superphosphate, and kainit 

 applied singly and in various combinations to oats, the increases in yield se- 

 cured ranged from 2 cwt. 2 qrs. after an application of 1 cwt. of sulphate of 

 ammonia to 7 cwt. of grain after the application of a mixture of 1 cwt. of 

 sulphate of ammonia, 3 cwt. superphosphate, and 3 cwt. kainit. The average 

 yield secured during the 4 years 1906-1909 give to various applications the same 

 relative standing as those indicated by the yields of 1910. An application of 

 3 cwt. superi^hosphate, supplemented by sulphate of ammonia and kainit was 

 followed by a greater grain yield and a greater profit due to the use of arti- 

 ficial manures during 1908 and 1909 than when 2 or 4 cwt. of superphos- 

 phate was used with the same supplementary fertilizers. Similarly the use of 

 2, 3, and 4 cwt. of kainit each supplemented by sulphate of ammonia and 

 superphosphate was followed by approximately equal grain and straw yields 

 during 1908 and 1909, but the greatest profit resulted from the use of 2 cwt. 

 Although the results have not been uniform during the last 3 years distinctly 

 the best results have, on the whole, followed the use of a mixture of 1 cwt. 

 sulphate of ammonia, 3 cwt. superphosphate, and 3 cwt. kainit per acre. 



In a test with turnips of farmyard manure, superphosphate, sulphate of am- 

 monia, and kainit, singly and in various combinations, the increases in yield 

 due to the manures ranged from 11 tons 9 cwt. in case of 10 tons of farmyard 

 manure to 17 tons 16 cwt. after an application of a mixture of 10 tons of 

 farmyard manure and 4 cwt. superphosphate, 1 cwt. sulphate of ammonia, and 

 3 cwt. kainit. In a fertilizer test made without farmyard manure, when super- 

 phosphate, sulphate of ammonia, and kainit were applied singly and in various 

 mixtures, the increase in yields over the check plat ranged from 12 tons 17 cwt. 

 after 4 cwt. of superphosphate to 20 tons 9 cwt. after an application of a mix- 

 ture of 6 cwt. superphosphate, 1* cwt. of sulphate of ammonia, and 4* cwt. 

 kainit per acre. In a test of applications of 4, 5, and 6 cwt. of superphosphate, 

 each supplemented by dung, approximately equal profits were secured from the 

 2 larger applications during the years 190S and 1909. Similarly, applications 

 of 4, 5, and 6 cwt. of basic slag, each supplemented by dung, gave approximately 

 equal values of crop after deducting the cost of manure, but in case of appli- 



