C. CrOWTHBR and a. (J. RUSTON 



209 



alternately (dung for 1911 crop). Of the five plots sampled in 1914, 

 the "contmuous dung" plot (Plot 2) compares unfavourably with 

 Plot 7 in feeding value per acre. On examining further the records 

 of this plot (dung annually) it is noted that in each year although the 

 crop on this plot was much heavier than that on Plot 7, it was generally 

 so inferior in feeding value that the actual value per acre was distinctly 

 less. 



Removal of Maniirial Ingredients by Crop. 



In addition to the ordinary analysis of the hays from the plots 

 in 1911, determinations were made of the phosphoric acid, potash and 

 lime present in them, with the results sununarised in Table VII. 



Table VII. Manurial Ingredients ■present in Hay (1911). 



* Average of Plots 1 and 13. 



The data show clearly that, with perhaps the exception of the potash, 

 the composition of the hay with regard to manurial ingredients is a 

 very uncertain guide to the actual manurial treatment. The phosphoric 

 acid figures show far less variation than the potash, whilst the nitrogen 

 varied least of all. The proportions of lime are uniformly low in accord- 

 auce with the poverty of the soil in this ingredient. More especially 

 are the ratios of lime to phosphoric acid much below those taken as 

 normal for meadow hay (2-2| : 1). The point is of interest as having 

 a possible bearing upon the feeding value of the grass^. 



' CJ. Ingle, This Journal, 1910, ui. 22. 



