592 



EXPERIMENT STATION RECORD. 



"(3) When turnips are grown with artificial manures only, the manure used should 

 contain all the 3 important ingredients— phosphoric acid, nitrogen, and potash. 



"(4) The combination most successfully employed in these experiments was 672 

 lbs. superphosphate, 112 lbs. nitrate of soda, and 112 lbs. sulphate of potash. 



"(.')) The use of a eomiilete manure containing the 3 important manurial ingre- 

 dients gives more certain and more uniform results than the use of incomplete manures, 

 and the complete manures render the crops less susceptible to unfavorable influences 

 of weather or season. 



"{&) The omission of jiotash causes, on the majority of farms in the west of Scot- 

 land, a considerable, and in many cases a large, reduction of crop, and a diminution 

 of profits. 



"(7) On a number of farms good crops can be grown with superphosphate alone, 

 and the addition of nitrogenous and potassic manures does not on them produce a 

 profitable return in the first crop. 



"(8) Superphosphate is a more generally effective and reliable manure than basic 

 slag when applied alone in spring to the turnip crop." 



Report on the composition of turnips, J. Hendrick {Glasgoic and 

 West of Scofland Technical College, Agl. Dept. lipts. 1895, pp. 23-27). — 

 The soil on which these experiments were made was very uniform in 

 quality and was in such poor condition that almost no crop was iiro- 

 duced without manure. The plats were differently fertilized and planted 

 with the same variety of turnips. Care was used to select representa- 

 tive samples and from 14 to 19 roots were analyzed from each plat. 

 Tables are given showing the yields per acre of roots and tops upon 

 each x)lat and the composition as affected by the different fertilizers. 

 The principal data are shown below : 



Effect of fertilizers upon the composition of turnips. 



The turnips from the unmanured plat were very small and contained 

 much more than tlie normal amount of dry matter and of nitrogenous 

 substances. The author believes that the excess of nitrogenous mat- 

 ters in these stunted turnips proves that the turnip is quite capable of 

 obtaining a sufiBcient supply of nitrogen from a soil moderately sup- 

 plied with this element and that the stunting is due to lack of ash 



