C. Crowther and A. Gr. Ruston 



205 



Chemical Composition and Estimated Nutritive Value of the Haij Cro]). 



In order to arrive at a complete record of the efiects of the dift'erent 

 maniirings upon the hay crop it is necessary to know not only the yields 

 of hay but also the relative nutritive value of the produce from each 

 plot. This latter can be assessed either directly by feeding experiments 

 or indirectly from the chemical composition of the hays. In the case 



Table IV. Chemical Com-position of Hay. 



Plot 



No. 



Crude 

 protein 



True 



protein 



Digestible 



true 

 protein * 



Crude 

 fibre 



Asii 



Etber 

 extract 



N-free 

 extractives 



Per eeut. in dry matter 

 1909 crop 



Moisture 

 in hayf 



1 



2 

 3 

 7 

 9 

 11 

 12 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



U 



12 



13 



1911 Crop 



51 

 5-3 

 5-4 

 5-7 

 4-9 

 5-0 

 61 

 4-6 

 6-2 

 5-7 

 01 

 5G 

 4-8 



1914 Crop 



* Laboratory determinations with acid solution of pepsin. ■\ At time of analysis. 



of the Garforth experiment the size of plot used precluded the application 

 of the direct method, so that recourse could only be had to chemical 

 analysis. Various observers^ have shown how unreliable are the indica- 

 tions of present methods of analysis as a guide to the relative feeding 



1 eg. Hall and Russell, This Journal, 1912, iv. 339. 



