mo 



EXPERIMENT STATION RECORD. 



tliew' (lata tlic utilization of tlie nitrogen of the various fertilizers during the first 

 and second year is ealculated. The results are summarized in the following table: 



Utilization of nitrogen in various fertilizers. 



Kiiiii of iiUroKi'uoiis fertilizer. 



In the first year. 



First se- Second Third se- 

 ries, series. ries. 



In both years. 



First se- Second 

 ries. series. 



Nitrate of soda 



Sulphate of ammonia 



Horn meal 



Dried blood 



LiiHiid manure 



Dry i)igf manure 



Green vetches turned under in the fall 



Alfalfa hay turned under in the fall 



Alfalfa hay turned under in the spring 



Well-rotted liurnyard manure aiiplied in the fall .. 



Fresh barnyard manure applied in the spring 



Fresh barnyard manure applied in the fall 



Well-rotted barnyard manure applied in the spring . 



Per cent. 

 71 

 62 

 68 

 56 

 53 

 44 

 44 

 39 



Per cent. 

 46.0 

 41.0 

 38.0 

 22.0 

 19.0 

 19.0 

 35.0 

 25.0 

 29.0 

 14.0 



4.6 

 16.0 



1.0 



Per cent. 

 77 

 60 

 61 

 40 

 24 

 31 

 50 

 30 

 50 

 19 

 20 

 16 

 10 



Per cent. 

 71 

 67 

 67 

 69 

 54 

 52 

 60 

 41 



Per cent. 

 53 

 46 

 46 

 27 

 26 

 27 

 45 

 32 

 33 

 22 

 18 



The relative effectiveness of the different fertilizers as compared with nitrate of 

 soda is shoM'n in the following table: 



Relative effectiveness of different nitrogenous fertilizers, taking nitrate of soda as 100. 



Kind of nitrogenous fertilizer. 



Sulphate of ammonia 



Horn meal 



Dried blood 



Liquid manure 



Dry pig manure 



Green vetehes txirned under in the fall 



Alfalfa hay turned under in the fall 



Alfalfa hay turned under in the spring 



Well-rotted barnyard maniire applied in the fall 



Fresh barnyard manure applieil in the spring 



Fresh barnyard manure aiijilied in the fall i 



Well-rotted barnyard manure applied in the spring 



Average. 



Per cent. 



90 



90 



67 



62 



67 



781 



59^69 



62j 



49 "I 



41 



60 



42(27) 



45 



The metliods of exact field manurial trials {Jour. Bd. Agr. [^London'], 10 

 {190S), No. 2, pp. 220-225). — This is a summary of Wagner's views regarding the 

 principles whi(;h should be borne in mind in conducting field experiments with 

 fertilizers. The main factors upon which emphasis is laid are uniformity of soil; the 

 use of numerous control plats; the employment of accurately laid out, square, 

 fortieth-acre plats; the careful preparation, measurement, weighing, and application 

 of fertilizers; and the weighing and sampling of the crop on the plats as soon as 

 harvested. 



The fermentation of tooengkil, H. A. C. Van der Jagt {Meded. Proefstat. Suiker- 

 riet Me.^t Java, 1903, No. 66, pp. 25; reprint from Arch. Java Snikerind, 1903, No. 17) . — 

 Boengkil is a fertilizer made from peanut-oil cake. This material, when piled in 

 large heaps, ferments and the heat has been known to cause spontaneous combustion. 

 Since the rise in temperature may be prevented by the addition of chloroform or 

 carbolic acid, the'author concludes that it is due to micro-organisms. The addition of 

 water to the boengkil was found to be necessary to start fermentation. It is explained 

 that tiie water brings some of the material into solution and thus enables the organ- 

 isms not only to multiply rapidly, hut also to make use of those portions of the food 

 material not already in solution. 



