The AgTicultural Value of Bone-meal. 



Reviewed by Charles Wellington, Ph. D. 



Associate Chemist Mass. Ayricitltural College. 



The purpose of this bulletin is to place before farmers the 

 latest results of comparative experiments with Bone-meal and other 

 phosphates, applied as fertilizers, on various soils for various crops. 



In the succeeding pages are data established by Wagner^ of 

 Darmstadt, and Steffek and Maercker- of Halle, in Germany, and 

 others. These are believed to oHer sufficient proof of the following- 

 statements. 



SUMMARY OF BULLETIN. 



Page. Table. 



1 . The SUPERIOR VALUE which has hitherto been accorded 



to undissolved Bone-meal as a fertilizer is due 

 SOLELY to the nitrogen which it contains. 



2. Undissolved Bone-meal as a phosphate fertilizer is 



NO MORE valuable THAN are the raw mineral 

 phosphates. 6 



3. Hereafter ii must be classed with the latter, rather 



than with high grade phosphates containing avail- 

 able phosphoric acid. 



4. As a PHOSPHATE FERTILIZER it yields NO BETTER'TeSultS 9 I 



THAN MINERAL PHOSPHATES, whether tried ALONE OR 



WITH SUPERPHOSPHATE, ou loains or sandy soils, on 

 soils rich or very poor in phosphoric acid, whether 10 II 

 with grains or with turnips, mustard, or other cru- 

 ciferous plants ; either in the first or in succeeding 

 crops. 13 III 



5. The VARIOUS kinds of Bone-meal show no essential 



DIFFERENCE in thcsc results. -9 I 



6. The best form in which to apply Bone-meal is as 



"Dissolved Bone-meal," i. e. mixed with 60 

 degree sulfuric acid, at the rate of 20 per cent for 

 raw, and 40 per cent for glue-free Bone meal. 16 VI 



7. For stocking LAND with a supplj' of phosphoric acid, 



' ' Dissolved Bone meal " is better adapted than is 

 superphosphate. 18 



Special attention is directed to the short tables on pages 6, 9, 10, 12, 13, 17. 

 'All references may be found on page 18. 



