i88 



Journal of Agricultural Research 



Vol. XIII, No. 3 



In Table XIV are stated (i) the corrected loss of the several soils in 

 burning, (2) the excess of such loss shown by the manurial mixture 

 as compared with the unmanured soil, (3) the corresponding weights 

 of these excesses in 2,000,000 pounds of the soil, (4) the weights of organic 

 matter originally added in the manurial substances, (5) the weights, 

 and (6) the percentages of the added organic matter that had disappeared 

 during the nine months of the experiment. 



Table XIV. — Total organic matter of the manured soils {Series I) 



Material. 



Losses on 

 burning. 



Excess of 

 losses by 



manured v. 



control soil. 



Weifrht of 

 excess in 

 2,000.000 

 pounds. 



Weight of 



manurial 



organic 



matter 



originally 



added. 



Loss of added organic 

 matter by fermentation. 



Weight. 



Per cent. 



Control soil 



Legume mixtures: 



Soybean 



Canada field pea . . 



Sweet clover 



Alfalfa 



Red clover 



Hairy vetch 



Siibaverage 



Nonlegume mixtures: 



Wheat 



Rape 



Oats 



Com 



Rye 



Timothy , 



Redtop 



Sorrel 



Subaverage 



Bamj^ard manure mix 

 ture 



Poultry manure mix 

 ture a 



Grand average . . 



Per cent. 

 4-873 



Pounds. 



Pounds. 



Pounds. 



304 

 479 

 482 



346 

 112 



535 



o. 426 

 .669 

 . 604 

 .468 



1-234 

 •657 



8,520 

 13.380 

 12, 080 



9.360 

 24, 680 

 13. 140 



29, 216 



35. 540 

 36, 864 

 36. 548 

 37,100 

 37,216 



20, 696 

 22, 160 

 24, 784 

 27, 188 

 12, 420 

 24, 076 



5-543 



5-547 

 5-315 

 5-539 

 5- 419 

 5.812 



5- 746 

 5.644 

 5-455 



5- 560 



5-563 

 5-368 



.676 



13. 527 



35.414 



669 



437 

 661 



541 

 939 

 868 

 766 



577 



13. 380 

 8,740 

 13,220 

 10, 820 

 18, 780 

 17.360 

 15.320 

 11,540 



682 



13, 645 



490 



13, 700 

 9, 800 



35. 744 

 32, 132 

 35.384 

 36,516 

 38, 160 

 37. 504 

 37. 596 

 36.072 



22,364 



23.392 

 22, 164 

 25, 696 

 19.380 

 20, 144 

 22, 276 

 24, 532 



36, 138 



22, 483 



24,352 

 28, 552 



10, 652 

 18,752 



5-553 



680 



13.601 I 35.063 



21, 462 



70.84 



62.35 

 67. 23 



74-39 

 33-48 

 64. 69 



61.80 



62.57 

 72. 80 

 62. 64 



70-37 

 50.81 



53-71 

 59-25 

 68.01 



62. 21 



43-74 

 65.68 



61. 21 



a Omitted from grand average. 



With respect to the soils of Series I, these general facts appear: All 

 the organic manures left the soil richer in organic matter nine months 

 after their addition. In the application of this result to practice it must 

 be recalled that the moisture condition was most favorable and that 

 the temperatures were also somewhat more favorable to fermentation 

 and decomposition than a corresponding nine months outdoor season 

 from March to November would be. Furthermore, it is to be recalled 

 that the soil was a fine silty loam, and was, on the one hand, less favorable 



