A SURVEY OF THE FERTILIZER INDUSTRY. 7 
SOURCES OF NITROGENOUS MATERIALS. 
Table VI and a graph (fig. 1) show the sources of ammonia used 
in mixed fertilizers. The table shows the total amount of each 
material used, as reported by the fertilizer manufacturers, the aver- 
age ammonia content, the total quantity of ammonia in each 
material, and the proportion of the total ammonia derived from 
each source. 
TaBLE VI.—Sources of ammonia in mixed fertilizer. 
Quantity of mate-| Units of ammonia in |- Percentage of 
Average | Tial used (2,000- materials used (unit | ammonia from 
NMatertalt percent | pound tons). =20 pounds). each source. 
of am- 
monia 
1917 1918 1917 1918 1917 1918 
PAIS OUTCESH ssa aes hoe eel ORES Beale oS oe | Miele ics weve 18, 620, 200 | 15, 039, 300 100 100 
Sodium nitrates... 2. ss 5. 18.8 | 285,983 | 234,794 | 5,376,500 | 4,414, 100 28.9 29.4 
Ammonium sulphate.........-. 24.3 | 125,283 | 103,356 | 3,044,400 | 2,511,600 16.3 16.7 
Cramamidinn 22 cee k saat 15.6 37, 230 6, 099 580, 800 95, 100 3.1 6 
Nitrate oflime................- 15.6 33 595 500 953000 |e See: 1 
Ammonium phosphate. .....-.. 13.0 20, 237 7,098 263, 100 92,300 1.4 6 
Tankage: 
Animal (high grade)......-- 11.0 | 185,491 | 134,446 | 2,040,400 | 1,478,900 11.0 9.8 
Animal (low grade)......... 7.0 | 108,775 | 82,209 761, 400 575, 500 4.1 3.8 
Gaernbacein ese fee ae ei, 3.3 | 123,835 96, 142 408, 700 317, 300 2.2 2.1 
Tankage (n. 0.S.)........--- 6.3 5, 994 4,770 37, 800 30, 100 .2 5%} 
Dried bloods 32 sheet cs, 13.8 37, 189 25, 799 513, 200 356, 000 2.8 2.4 
Cottonseed meal..............-- 8.4 | 306,399 | 273,876 | 2,573,800 | 2,300, 600 13.8 15.3 
Fish scrap (dried).........-...- 9.0 28, 769 28, 813 258, 900 259, 300 1.4 Lez, 
Fish scrap (acidulated)......... 610) 15. .174234.| 24, 915 103, 400 145, 300 .6 1.0 
Castor bean pomace.......-..-.- 6.6 19, 948 36, 481 131, 700 240, 800 Sef 1.6 
ENGR erent iets oe ies eran. 18.0 9, 254 7,179 166, 600 129, 200 9 9 
UG OMIM CA ec serine Seine cise - 15.0 6,340 5, 681 95, 100 85, 200 5 6 
18 OTP Cees aeaciOSh Ge SCe OS CRI 15.0 200 74 3,000 1 CU tears Cicaaesracitac 
HTAGOISCLAD ES cake secjie bose inci ae 12.0 PAY ete Eat | 2, 600 TEARS IO Oi pes Secs 1 
Acidulated leather.........2-:-- 9.0 MDI SES Cie Ss DOOD NES SUD cE oe ee ae ect a a 
Leather scrap or meal.........-- 13.0 18, 078 13, 892 235, 000 180, 600 1.3 1.2 
NVoolowasteres. co8. 0h oe oe 7.0 1, 135 1,002 7, 900 TE Q00) ee. oe ene 
Tartar pomace...........--.---- 9 2, 709 2, 893 2, 400 25600) fe coals ie eelaee 
eat (Gime) eee ccm cect oe oS 5 1.5 742 1, 892 1, 100 2, 800-452 See eee 
Naturalisnano: feo. 2220 0.2) 2) 7.8 67, 715 52, 549 528, 200 409, 900 2.8 2.7 
IB ASC\LOUGS ial eeae os Set = 2s 2.4 | 518,378 | 502,132 | 1,244,100 | 1,205,100 6.7 8.0 
Other nitrogenous materials. ... 6.1 39, 162 29, 259 238, 900 178, 500 1.3 1.2 
The total amount of ammonia used during 1917 was more than 
18,600,000 units of 20 pounds, and the total amount used during 1918 
exceeded 15,000,000 units. 
The principal source of ammonia during both years for which data 
were obtained was sodium nitrate, nearly 30 per cent of the ammonia 
being derived from that one source. 
The second source in importance was ammonium sulphate, from 
which about one-sixth of the ammonia was derived. 
Among the organic sources of ammonia, tankage and cottonseed 
meal are by far the most important. The proportion of ammonia 
derived from animal tankage of high and of low grade was less in 1918 
than in 1917, owing, probably, to the great demand for tankage as 
feed. The proportion derived from cottonseed meal increased from 
13.8 per cent in 1917 to 15.3 per cent in 1918. 
