6 BULLETIN 798, U. S. DEPARTMENT OF AGRICULTURE. 
importance. The production of but two of the other kinds amounted 
to 50,000 tons. _ 
Table V shows the quantity of phosphate rock marketed in the 
United States during the six months from January to June, 1918, 
distinguishing between the amount that was used in the manufac- 
ture of acid phosphate and the amount that was sold directly to 
farmers for application to the soil. It also shows the quantity 
exported and the stocks on hand at three given dates. 
TABLE V.—Phosphate rock marketed January-June, 1918, and stocks on hand Jan. 1, 
1917 and 1918, and June 30, 1918. 
[2,000-pound tons.] 
Quantity marketed in 
United States Janu- Stocks on hand. 
ary—-June, 1918. Quantity 
exported 
Kind of rock. January- 
Toacid |Tofarmers} June, 
phosphate | for direct 1918. Jan. 1, Jan.1, | June 30, 
1 
manufac- | applica- 1917. 1918. 918. 
turers. tion. 
AMOS HN [Ee 2 =e eS Ren Ar tra 805, 735 65, 225 27,664 | 713,290 | 974, 564 944, 665 
Florida: 
PLOTCT OG Rootes ae ane fees ee eae | eee eee 2,732 | 174,530 | 220,824 228, 162 
Soli pHosphates uso eo ee | 58 6, 559 1,002 326 370 170 
icand wpebblesivjos5. 2242 SEE! 706, 935 45, 203 21,385 | 499,407 | 748,243 708, 780 
Tennessee: : 
(Browalrocks! besieys. Fee ke Fede: 93, 854 11, 364 2, 545 39, 020 5, 121 7, 547 
Bie mOCKe es cep eee eons ae 587 2 100k soso sesso | Wee. ot Sales aces eee 
SouthtCanolinalss5. 2 RNG. hs. SIS SS PETES DOES EES PEL eee 7 6 6 
(Chey ed ne See ee ete LOGE ose oe sak |e eee er ee ec | 
LOB tease ee Fes mee soe eS ee, So Seth S201 |e EE ieee des. eee eee Pe eee | ee 
Mentuck yee. <2 san eae eee ciel es Se pepe ica rete ees pall ere eee rat hee aes | ee oe 2 
The great mass of the rock marketed during the period under dis- 
cussion was in the form of Florida land pebble, of which 774,000 
tons were marketed during the first six months of 1918, and the 
next most important quantity was of Tennessee brown rock. It 
should be noted that most of the rock is sold to manufacturers of 
acid phosphate, and that only small quantities, amounting to about 
7 per cent of the total marketed in the United States, are sold to 
farmers for direct application to the soil. The exports for the six 
months of 1918 were very small, owing to the difficulty of obtaining 
cargo space. A notable fact is that the accumulation of phosphate 
rock in the hands of the mining companies is large. Very little 
hard rock was produced during the first six months of 1918, and the 
small quantity produced was exported, but a very considerable 
amount of that rock, more than 200,000 tons, was in stock. The 
stocks of the Florida land pebble rock were large and increased from 
499,000 tons at the beginning of 1917 to 748,000 tons at the begin- 
ning of 1918, but declined somewhat during the six months period, 
January—June, 1918. 
