Food fou Pi.axts. H7 



pliate, and the latter was supericn- to dried l^lood as a 

 source of nitrogen to crops. 



5. In the presence of nitrate, the manure and humus 

 nitrogen were utilized more' thoronuhly than in its 



absence. 



6. Under certain conditions, nitrates or other readily 

 available nitrogen compounds, may hasten the depletion 

 of the soil nitrogen. 



7. Ammonium sulphate and dried blood intensified the 

 development of acidity in the cylinder soils. 



8. The proportion of nitrogen in the crops was readily 

 affected by the nitrogen treatment. It was also affected 

 by the character of the crop itself. 



' 9. In the first rotation, the fresh manures produced 

 dry matter relatively someAvhat richer in nitrogen than 

 that produced by the leached manures ; in the second rota- 

 tion this relation was reversed. 



10. The solid and liquid manure, fresh, produced dry 

 matter relatively somewhat richer in nitrogen than that 

 produced by the solid, fresh. 



11. The smaller application of nitrate, when used 

 togetlier with manure, produced dry matter relatively 

 poorer in nitrogen than that produced by the larger 

 application of nitrate under the same conditions. 



12. The wide range in the proportionate content of 

 nitrogen in the crops, shows clearly that greater care 

 should be exercised in measuring out the nitrogen to our 

 cultivated crops. 



13. Out of every 100 pounds of nitrogen applied in the 

 form of nitrate, there were recovered in the first rotation 

 62.76 pounds, and in the second rotation 61.42 pounds. 

 The corresponding returns for ammonium sulphate were 

 49.51 pounds and 37.01 pounds respectively; and for the 

 dried blood 47. S9 pounds and 32.05 pounds respectively 

 This indicated that the acidity in the soils of series 17 

 and 18 had increased sufficiently to interfere with the 

 normal growth of the plants. 



14. Out of every 100 pounds of nitrogen ai)]»lie(l in the 

 form of animal manures, there were recovered in the 



