FIELD CROPS. 841 



8.44, insoluble 2.5U), pota.sh o.S\) per cent; station valuation $20.77, 

 selling price 127.26. 



From the data obtained "it appears that the manufacturers arc 

 delivering- on the av^erage practically the same amounts of total plant 

 food as in ISUO, in slightly ditt'erent proportions, but at an average 

 price per ton that is 40 cts. lower, notwithstanding the increase in 

 the wholesale prices of ammoniates." The tendency noted in previous 

 reports toward furnishing less nitrogen and more phosphoric acid and 

 potash is still more marked in the average for 1900. The average 

 cost per pound of nitrogen in 5 samples of nitrate of soda examined 

 was 12.94 cts.; of 2 samples of sulphate of ammonia, 15.82 cts.; 3 

 samples of dried blood and ammonite, 14.17 cts. ; 13 samples of ground 

 fish, 13.66 cts. The average cost per pound of available phosphoric 

 acid in 17 samples of superphosphate was 4.09 cts. The average cost 

 per pound of potash in 5 samples of muriate of potash, 4.11 cts.; of 1 

 sample of sulphate of potash, 4.77 cts. ; and 1 sample of kainit, 3.37 cts. 



Nitrate of soda and sulphate of ammonia, R. Warington {Ann. Agron., 26 

 {1900), Xo. 11, pp. 5.30-361), — This is a translation from the English by E. Demoussy 

 of an article which has already been noted in the Record (E. S. R., 12, p. 529). 



Inspection and analyses of fertilizers, W. F. Hand et al. {Mississippi Sta. Bui. 

 64, pp. 31). — This bulletin contains jjrief statements regarding the collection of sam- 

 ples, the management of the fertilizer control during the season of 1899-1900, expla- 

 nations of terms used in fertilizer analyses and of the valuation of fertilizers, sugges- 

 tions regarding the form of certificate to be used on samples sent for examination 

 and of guaranties to be used on packages of fertilizers, and tabulated analyses and 

 valuations of 211 samples of fertilizers examined during the season of 1899-1900. 



Another warning in regard to compost peddlers, W. A. Withers {North Car- 

 olina. Sfa. Bui. 17S, pp. SS-90). — The i)urpose of this bulletin is to repeat a warning 

 given in an earlier bulletin (E. 8. R., 9, p. 123). This warning is emphasized by 

 pointing out the defects in 2 fertilizer formulas which have been offered for sale in 

 North Carolina. The bulletin also contains a list of books and other publications 

 relating to fertilizers which the author recommends to those desiring information on 

 this subject. 



FIELD CROPS. 



Field experiments, J. G. Lee {Louisiana Stas. Bui. G^^^.ser., 

 pp. JiJJS-Ji,73). — -Results secured in cultural and variety tests and in rota- 

 tion experiments are here recorded. An account of the three-course 

 rotation of corn, oats followed l)y cowpeas, and cotton has been previ- 

 ously noted (E. S. R., 7, p. 398). Data are here given for the crops 

 grown during each of the years 1889 to 1899. A part of the experi- 

 mental plats has been regularly manured. An examination of the 

 results obtained shows that "the fertilized half has been built up 400 to 

 500 per cent in 11 j^ears while that without fertilizer has gained from 

 12 to 25 per cent." 



In a test of 27 varieties of cotton, the largest yield of seed cotton 

 was afforded by Hawkins Prolific, closely followed by Texas Bur, 



17622— No. 9 4 



