FERTILIZERS. 235 



In case of the third series of experiments (rye and oats followed by 

 Hungarian grass), the crops were greatly damaged by excessive rains 

 and the results are withheld from publication. 



Improvement and fertilization of land, E. W. HlLGAKD (California Sta. Rpt. 

 1895-1897, pp. 1D7-111).— A brief discussion of the fertilizer requirements of plants 

 and the use of fertilizers, especially ou California soils; suggestions regarding fer- 

 tilizer experiments; and analyses of 15 samples of fertilizing materials, including 

 gypsum, dust from sheep lleeces, phosphate, soil from Indian burial ground, guano, 

 clay, shell rock, lime refuse, and waste water from sugar-beet factories. 



Survey of the most recent literature on the fertilizing of the soil (Selsk. Khoz. 

 i Lyesov., 187 (1897), Dec, pp. 606-624). 



General considerations relating to the valuation of fertilizers, H. Vanderyst 

 (Rev. Gen. Agron., 1898, Nos. 2,pp.80-88; 4, pp. 184-190; 5, pp. 226-289). 



Farm manure and denitrification, R. Warington (Ann. Agron.,24 (1898), Xo. 4, 

 pp.145— 171). — This is a French translation by E. Deinoussy of an article which 

 appeared first in Jour. Roy. Agr. Soc, 3. ser., 8 (1897), pt. iv, pp. 577-607 (E. S. R., 9, 

 p. 933). 



On the nitrogen feeding of phanerogamous plants by means of amins, am- 

 monium compounds, and alkaloids, L. LUTZ (Cdmpt. Bend. Arnd. Sci. Paris, 126 

 {1898), Xo. 17, pp. 1227-1229). 



The origin of the nitrate of soda of Chile, W. Newton (Ann. Sci. Agron., 189S, I, 

 Xo. 1, pp. 40-45). — A discussion of the theories of the formation of the nitrate de- 

 posits. 



Nitrate of soda and perchlorate of potash — remarks on certain failures -with 

 rye, L. Grandeau (Ann. Sci. Agron., 1S98, I, Xo. 1, pp. 84-91). — A discussion of this 

 subject based principally upon the observations of Sjollema, Wagner, and Stutzer. 



Report on injuries caused by the use of nitrate of soda in the spring of 1896, 

 M. Citispo (Ann. Sci. Agron., 1898, 1, Xo, l,pp. 92-120). 



Investigations on the action of ammonium sulphate and nitrate of soda, 

 E. Kloepfer (Essen: G. I). Baedeker, 1898, pp. 59, ill.). 



The production of potash (potassium carbonate) from ashes. Practical guide 

 for the preparation of potash from trees and grasses, P. Phedotyev (St. Peters- 

 burg, 1896, pp. 42; abs. in Selsk. Khoz. i Lyesov., 187 (1897), Oct., p. 235). 



Provisions of the new fertilizer law of New York, L. L. Van Slyke et al. (New 

 York State Sta. Rpt. 1896, pp. 125-137, pi. 1).— Reprint of Bulletin 103 of the station 

 (E. S. R., 8, p. 212). 



Report of analyses of commercial fertilizers for the spring of 1896, L. L. Van 

 Slyke et al. (New York State Sta. Rpt. 1896, pp. 138-208).— Reprint of Bulletin 107 of 

 the station (E. S. R., 8, p. 766). 



Report of analyses of commercial fertilizers for the fall of 1896, L. L. Van 

 Slyke et al. (Xew York State Sta. fijit. 1896, pp. 204-261). — Reprint of Bulletin 116 of 

 the station (E. S. R., 9, p. 122). 



The real value of natural plant food, L. L. Van Slyke (New York state Sta. Rpt. 

 1896, pp. 119-124).— A reprint of Bulletin 108 of the station (E. S. R., 8, p. 766). 



Alkali, C. H. Siiinn (California Sta. Pxpt. 1895-1897, pp. 850-352).— The rise of 

 alkali in the experimental fields of the San Joaquin Valley Substation is discussed 

 and experiments with gypsum for correcting alkali are reported. When this substa- 

 tion was first established alkali did not show, except in three or four spots on tbe 

 experimental field, but as cultivation has proceeded the rise and spread of the alkali 

 has been very rapid. Gypsum, in connection with irrigation and uuderdraining, has 

 given good results in correcting the alkali. 



