No. 7„ 



DEPARTMENT OF AGRICULTURE. 



457 



LoacliLd Manure, 

 rounds of Nitrogen Recovered in every 100 Pounds Applied. 



Corn, 

 Oats, .. 

 Wheat, 

 Timothy 



1 to +1.64 

 +2.05 



-1.21 

 +1.24 



Stated in another way, the nitrogen in the solid and liquid manure, 

 fresh, on the average, is 48 per cent, better than in the solid manure, 

 fresh. The nitrogen in the solid and liquid, leached, is on the aver- 

 age 42 per cent, better than in the solid, leached. The nitrogen in 

 the solid, fresh, is 15.8 per cent, better than in the solid, leached, 

 and the nitrogen in the solid and liquid, fresh, is 34.7 per cent, bet- 

 ter than in the solid, leached. 



A study of these figures, reveals some very interesting facts, par- 

 ticularly in reference to the differences obtained when the manures 

 are applied to the spring crop, and when applied to crops seeded in 

 the fall. In the case of corn, it is shown that the nitrogen in the solid 

 and liquid manure, combined, fresh, is nearly three times as valuable 

 as in the case of the solid manure, alone. The same is practically 

 true in the case of the manures when applied to oats. That is, every 

 ton or every unit of nitrogen in the solid and liquid manure, com- 

 bined, is worth 2.8 times as much as that contained in the solid 

 manure, alone. When it is remembered, that in a great many cases, 

 animals are stabled in such a way as to lose a large proportion, at 

 least of the liquid part of the manure, the loss falls upon the most 

 valuable portion. These facts are also strikingly instructive in 

 reference to the relatively high availability of the nitrogen in fresh 

 manures, comparing very favorably with the nitrogen in commercial 

 supplies. The comparison between the solid, alone, and the solid 

 and liquid, combined, in the leached products, shows (hat while the 

 relations are the same in a general way, they are less striking. That 

 is, the leaching having carried away the larger proportion of the 

 liquid parts, makes the use of a unit of nitrogen in the leached ma- 

 terial less effective, than in the case of the fresh. Nevertheless, the 

 combined material is per unit of nitrogen from 1.6 to 2 times as 

 effective as in the solid portion. It was stated, that in the planning 

 of these experiments, the amounts used were so adjusted as to com- 

 pare favorably with those used in pracdce. That is, the measures 

 were so adjusted as to make the application correspond with about 

 16 tons of good manure per acre. In the case of the spring crops, 

 the returns showed a larger utilization of the nitrogen, particularly 



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