FERTILIZEES. 348 



Manures and manuring", O. Lemmermann (Die Di'ingerlehrc. Lt'ij>i<ig: Morltz 

 Schafcr, 1902, pp. i240, Jiytf. 8). — This book is based largely upon the author's own 

 investigations and is intended for the general reader as well as for the use of students 

 and teachers of agriculture. It contains chapters on the conditions of growth of 

 plants, the general subject of manuring , and on the source, nature, and use of dif- 

 ferent kinds of fertilizing materials, including l)arnyard manure, green manures, and 

 conunercial fertilizing materials. 



Commercial fertilizers, AV. W. Miller and N. W. Lord {Offic. Rpf. Sec. Ohio 

 Stale Bd. Agr. on Com. Ferts. 1901, pp. 93). — This is a report of analyses of 537 sam- 

 ples of fertilizers examined by the State chemist during the year 1901, with a list of 

 certificates tiled by manufacturers, etc., under the State law. The analyses are 

 accompanied by explanatory notes and the text of the State fertilizer law. 



Analysis of commercial fertilizers sold in Maryland, H. B. McDonnell et 

 AL. (Mdnjland Agr. College (Jiiort., 1902, No. 17, p]>. 65). — A report in the usual form 

 of analyses and valuations of 494 samples of fertilizers examined from February to 

 June, 1902, inclusive. 



Fertilizer analyses, R. C. Kedzie {Michigan Sia. Bui. 202, pp. 219-243). — Analy- 

 ses of 91 samples of fertilizers, with explanatory notes. 



On the relative availability for ag-ricultural plants of the phosphoric acid 

 of mineral phosphates, P. Kossovich (Zhnr. Opnitn. Agron. \_Jour. Erpt. Landir.'] 

 2 (1901), Xo. 0, pp. 711-732, pi. 1). — Pot experiments are reported which show that 

 mustard and buckwheat gave about the same yield with mineral phosphate as with 

 Thomas slag; clover and flax showed less capacity for utilizing the mineral phos- 

 phate; and winter rye utilized the phosphoric acid of such phosphates to only a lim- 

 ited extent. 



Basic superphosphate, its composition and use as a manure, J. Hughes 

 {Jour. Bath and West and South. Counties Soc. [Enghrnd'], 4- ser., 12 {1901-2), pp. 

 6.5-78, fig. i).— See E. S. R., 13, p. 234. 



Relation between the amounts of phosphoric acid and ammonia in plants, 

 especially in sugar beets, H. Pellet {Ztsrhr. TVr. Dent. Znckerind., 1902, Xo. 555, 

 pp. 390-393; ahs. in Jour. Chem. Soc. [London], 82 {1902), Xo. 478, JI, p. 526).— 

 Results of examinations of Egyptian beets grown on soil formed by the gradual 

 accumulation of Nile mud and containing only traces of ammonia or nitric acid are 

 reported, which contirm the conclusion of Champion and Pellet that plants contain 

 ammoniacal nitrogen and phosphoric acid in the proportions to form ammonium 

 magnesium phosphate. 



Ammonia salts as a source of nitrogen for plants, P. Kossovich {Zhnr. Opuitn. 

 Agron. [Jour. Exjit. La)idu\], 2 {1901), Xo. 5, pp. 62,5-638, figs. 3). — Experiments 

 made under conditions which precluded the presence of any form of nitrogen except 

 ammonia salts showed that jieas utilize such nitrogen in their growth about as well 

 as that of nitrates. Other investigations on this subject are reviewed and the appa- 

 ratus and method used by the author are described in detail. The article is in Rus- 

 sian, but contains a summary in German. 



The solvent action of ammonia salts on phosphorites, I. Shulov {Izv. Mos- 

 cow Selsk. Klioz. Inst. {Ann. Inst. Agron. Moseou), 8 {1902), Xo. 2, pp. 161-167). — 

 Vegetation experiments which were carried out in the Moscow Agricultural Institute 

 in 19C0 under the direction of Professor Prianishnikov showed that ammonium sul- 

 phate and nitrate further the assimilation by the plants of phosphoric acid from 

 phos}ihorites. The cause of this favorable assimilation is presumably the so-called 

 physiologically-acid nature of the ammonium salts. Vegetation experiments carried 

 out by the author with barley corroborated these observations. When calcium 

 nitrate was used as nitrogen fertilizer with phosphorite the yield was only 7.2 gm., 

 containing 11.38 mg. phosphoric acid; l)ut the croj) increased to 44.8 gm. with 151.15 



