39 



4. Hynite Tankage. 



(a) Both of the laboratory methods graded the nitrogen in this product as of 

 passing quahty. The total nitrogen availability by the vegetation test, on the 

 basis both of yield of dry matter and of recovery of nitrogen, where the smaller 

 amount was used, averaged as good as for dried blood. Where the larger amount 

 was used, on the basis of dry matter yield, it gave an availability of about 45 per 

 cent; on the basis of nitrogen recovered, it showed an availability of about 39 

 per cent. 



(6) On the water insoluble nitrogen the laboratory methods gave satisfactory 

 nitrogen activities. The vegetation test showed low availabilities, about 35 per 

 cent being recorded on basis of both dry matter yield and nitrogen recovered, as 

 compared with blood at 80. 



(c) The conflicting results secured on total nitrogen availabihty by the smaller 

 and larger nitrogen applications still leave the question undecided. The uniform 

 low results secured on the water insoluble nitrogen class it as being of inferior 

 quality. 



6. Horn and Hoof Meal. 



Both laboratory methods and vegetation tests class the nitrogen in this product 

 as of good quality, although the water insoluble nitrogen was of somewhat lower 

 grade than that found in dried blood. 



It is hoped that further availability data may be secured on these products in 

 1927. 



